Chemistry The Halogens and Noble Gases Online Mcqs Test

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Question 1

1. Which one of the following elements belongs to halogen family?

Question 2

2. Which of the following has greatest reducing power?

Question 3

3. Which of the following alkaline earth metals is the strongest reducing agent?

Question 4

4. For two ionic solids CaO and Kl, identify the wrong statement among the following?

Answer

Lattice energy of CaO is much higher than that of Kl

Answer

Kl is soluble in benzene

Answer

Kl has high m.p.

Answer

CaO has high m.p.

Question 5

5. Which is the symbol of element whose atoms have the outermost configuration 2S²2P³ is

Question 6

6. Which of the following noble gases does not have an octet of electrons in its outermost shell?

Question 7

7. Variable valency is characteristic of

Answer

Transition elements

Answer

Alkali metals

Question 8

8. Which one of the following reacts with hemoglobin to form carboxuhaemoglobin?

Question 9

9. Which element react directly with Kr, Xe and Rn?

Question 10

10. On heating sodium metal in a current of dry ammonia, the compound formed is

Answer

Sodium azide

Answer

Sodium hydride

Answer

Sodium amide

Answer

Sodium nitride

Question 11

11. Select the weakest acid among the following

Question 12

12. When sulphur is boiled with Na₂SO₃ solution, the compound formed is

Answer

Sodiums sulphates

Answer

Sodium persulphate

Answer

Sodium sulphides

Answer

Sodium thiosulphate

Question 13

13. What causes nitrogen to be chemically inert?

Answer

Multiple bond formation in the molecule

Answer

Short internuclear distance

Answer

High bond energy

Answer

Absence of bond polarity

Question 14

14. Keeping in view the uses of Al, mark the incorrect statement. Al is used

Answer

As an oxidizer in metallurgy

Answer

For preparing artificial

Answer

In form of foil for wrapping

Answer

As an abrasive in the form of abundum

Question 15

15. Which one of the following allotropic forms of carbon is isomorphous with crystalline silicon?

Question 16

16. Choose a set which has both member from the same periods of periodic table

Question 17

17. In the electrolytic extraction of aluminum fused cryolite is added

Answer

To protect the anodes

Answer

To make a conducting solution of bauxite

Answer

To increase Al production

Answer

To act as reducing agent

Question 18

18. Because of its small size and due to restriction of its valence shell to an octet fluorine differs from other halogens, which behavior of fluorine is incorrect?

Answer

It has highest first I.E

Answer

It has highest E.N

Answer

It is more reactive than other halogens

Answer

It restricts to oxidation state – 1 only

Question 19

19. The electronic configuration of metal M is 1s², 2s², 2p⁶, 3s¹. The formula of its oxide would be

Question 20

20. In view of their low ionization energies, the alkali metals are

Answer

Strong reducing agents

Answer

Strong oxidizing agents

Answer

Weak reducing agents

Answer

Weak oxidizing agents

Question 21

21. Gradual addition of electronic shells in the noble gases causes a decrease in their

Answer

Boiling point

Answer

Ionization energy

Answer

Atomic radius

Question 22

22. Choose the correct statement about heat of vapourization of noble gases

Answer

It increases gradually down the group

Answer

None of these

Answer

Noble gases have o heat of vapourization

Answer

It decreases gradually down the group

Question 23

23. Which shows maximum catenation property?

Question 24

24. What is more true about alkali metals?

Answer

Oxidizing agents

Answer

Hydrolyzing agents

Answer

Reducing agents

Answer

Both oxidizing and reducing agents

Question 25

25. In curing cement plasters, water is sprinkled from time to time. This helps is

Answer

Converting sand into silici acid

Answer

Keeping it cool

Answer

Hydrating sand and gravel mixed with cement

Answer

Developing interlocking needle like crystals of hydrated silicates

Question 26

26. The noble gas He was discovered by

Answer

Frank land and Lockyer

Answer

Rutherford

Question 27

27. B, Al, Ga, In and Tl belong IV group of the period table show a decrease with increasing relative atomic mass:

Answer

The first ionization energy

Answer

The stability of +2 oxidation state

Answer

Ionic character of the compound

Answer

The basic character of the oxides

Question 28

28. Sea divers go deep in the sea water with a mixture of which of the following gases?

Answer

O₂ and CO₂

Answer

CO₂ and Ar

Answer

O₂ and Ar

Answer

O₂ and He

Question 29

29. The last member of the family of inert gases is

Question 30

30. Which of the following statement about fluorine is not correct?

Answer

Fluorine cannot be prepared by electrolysis of fused metal fluorides

Answer

Bond energy of fluorine is less than that of chlorine

Answer

Electron affinity of chlorine is greater than that of fluorine

Answer

Fluorine does not form oxoacid

Question 31

31. Bleaching powder reacts with a few drops of conc. HCl to give

Answer

Hypochlorous acid

Answer

Calcium oxide

Question 32

32. Which one has least dissociation energy?

Question 33

33. Which one is the biggest ion?

Question 34

34. Which is valence shell configuration of halogens?

Answer

nS₂, nP₃

Answer

NS₂, nP₄

Answer

nS₂, nP₆

Answer

ns₂, nP₅

Question 35

35. Which halogen acid is a liquid no room temperature?

Question 36

36. Which one boric acid is stable one?

Answer

H₂B₄O₇

Answer

None of these

Question 37

37. Which of the following is a man made element?

Question 38

38. Which of the following will liberate hydrogen by its reaction with hydrochloric acid?

Answer

Phosphorus

Question 39

39. Electron affinity depends on

Answer

Atomic size and nuclear charge both

Answer

Atomic size

Answer

Atomic number

Answer

Nuclear charge

Question 40

40. The halogen that is most easily reduced is

Question 41

41. Which is the strongest acid

Answer

Cannot be predicted

Question 42

42. Among noble gases (from He to Xe) only xenon reacts with fluorine to form stable xenon fluorides because xenon

Answer

Has the largest size

Answer

Has the highest heat of vaporization

Answer

Has the lowest ionization enthalpy

Answer

In the most readily available gas

Question 43

43. In the modern long form of the periodic table, elements are arranged in the increasing order of

Answer

Atomic number

Answer

Atomic mass

Answer

Mass number

Answer

Isotopic number

Question 44

44. Alkaline earth metals show standard electrode potential values which are very similar to their alkali metals due to

Answer

None of these of M²⁺ ions

Answer

Diamagnetic nature

Answer

High lattice energy of M²⁺ ions in the solid state

Answer

High energies of hydration of M²⁺ in solution

Question 45

45. Which of the following on heating at 125°C gives plaster of Paris?

Question 46

46. The compounds of alkaline earth metals have the following magnetic nature

Answer

Ferromagnetic

Answer

Diamagnetic

Answer

Antiferromagnetic

Answer

Paramagnetic

Question 47

47. The strongest reducing agent out of Na, K, Rb And Cs is

Question 48

48. Which is the most volatile compound?

Question 49

49. Choose the non metallic element whose molecules contain maximum number of its atoms

Question 50

50. The halogen which has only one oxidation state is

Question 51

51. Which one of them is monoatomic?

Question 52

52. The noble gases are

Answer

All of these

Answer

Polyatomic

Answer

Monoatomic

Question 53

53. The most powerful oxidizing agent among the halogens is

Question 54

54. The metal with highest electrical resistance at room temperature is

Question 55

55. Which of the following is most electronegative?

Question 56

56. Bromine can be liberated from KBr solution by the action of

Answer

Iodine solution

Question 57

57. AlCl₃ flumes in moist air because

Answer

It is covalent

Answer

It is highly hygroscopic

Answer

It is very volatile

Answer

HCl is formed in moist air

Question 58

58. The metal extracted by electrolysis of its fused salt is

Question 59

59. Match List I with List II and select the answer using the codes given below:

Code	List I	Code	List II
a	XeF₄	1	Distorted octahedral
b	XeF₆	2	Tetrahedral
c	XeO₃	3	Square planar
d	XeO₄	4	Trigonal pyramidal

Answer

a-4, b-1, c-3, d-2

Answer

a-2, b-3, c-1, d-4

Answer

a-1, b-4, c-2, d-3

Answer

a-3, b-1, c-4, d-2

Question 60

60. The following has zero valency

Question 61

61. Action of caustic soda on aluminum hydroxide gives a compound having formula

Answer

Na₃AlO₃

Answer

Na₂Al(OH)₄

Answer

Al₂(OH)₄

Question 62

62. SO3 is not dissolve directly in H2O because

Answer

SO₃ is insoluble in H₂O

Answer

The reaction is quite slow

Answer

The reaction does not go to completion

Answer

The reaction is highly exothermic

Question 63

63. If one liter of air is passed repeatedly over heated copper and magnesium till no further reduction in volume takes place, the volume finally obtained would be approximately

Question 64

64. Electropositive character increase down the group due to

Answer

Increase in atomic size of elements

Answer

Decrease in I.P

Answer

All of these

Answer

Decrease in electronegativity of the elements

Answer 117

Dissolving out unreacted silver bromide

Answer 118

Converting silver halides to metallic silver

Answer 119

Preventing overdeveloping and fogging

Answer 120

Reducing solubility of AgBr

Answer 121

Highest boiling points

Answer 122

Greater hardness

Answer 123

Lower ionization energies

Answer 124

Smaller ionic radii

Answer 125

Precipitate Mg metal

Answer 126

Have no effect

Answer 127

Leads to the dissolution of beryllium metal

Answer 128

Precipitate Mg

Answer 129

Flint glass

Answer 130

Crooke’s glass

Answer 131

Soda glass

Answer 132

Borosilicate glass

Answer 133

High ionization potential

Answer 134

Large size

Answer 135

Low ionization potential

Answer 136

Low electron affinity

Answer 137

Electron affinity

Answer 138

Energy dissociation

Answer 139

High atomic number

Answer 140

Hydration energy

Answer 141

Oxidizing as well as reducing agents

Answer 142

Oxidizing agents

Answer 143

Drying agents

Answer 144

Reducing agents

Answer 145

High polarisability

Answer 146

Weak van der Waals forces between atoms

Answer 147

Gaseous nature

Answer 148

Atoms of sodium and chlorine

Answer 149

Free molecules

Answer 150

Free electrons

Answer 151

Alkali metals do not reacts with metals

Answer 152

Alkali metal atom has the smallest size in its period

Answer 153

Alkali metals have ns’ configuring in outermost shells

Answer 154

Na cl on electrolyzing give sodium the anode and cl at cathode

Answer 155

It is as filter for soap

Answer 156

It is used furniture polish

Answer 157

It is used in the formation white cement

Answer 158

It is used as fire proof in textile

Answer 159

Small size of fluorine

Answer 160

More electron repulsion in fluorine

Answer 161

Non-metallic nature of fluorine

Answer 162

More electro negativity of fluorine

Answer 163

Some nitrogen molecules analogous to O₂

Answer 164

Greater amount of nitrogen molecules derived from N¹⁵ isotope

Answer 165

Electron deficiency

Answer 166

Ionization property

Answer 167

Covalent nature

Answer 168

Acidic nature

Answer 169

With halogens

Answer 170

With alkali metals

Answer 171

None of these

Answer 172

With inert gases

Answer 173

A marble states

Answer 174

Calcried gypsum

Answer 175

Sea shells

Answer 176

O > B > C > N

Answer 177

O > C > N > B

Answer 178

B > N > C > O

Answer 179

O > C > B > N

Answer 180

Atomic radius

Answer 181

Ionization energy

Answer 182

Boiling point

Answer 183

Show increasing electro negativity from Li to Cs.

Answer 184

Form salts which are predominantly covalent

Answer 185

Form salt like hydrides

Answer 186

Show decreased chemical reactivity with dry oxygen in going form Li to Cs

Answer 187

Ionization energy

Answer 188

Electron affinity

Answer 189

Hydration energy

Answer 190

Lattice energy

Answer 191

Solvated electrons

Answer 192

Sodium hydride

Answer 193

Sodium amide

Answer 194

Sodium atoms

Answer 195

Cage compound

Answer 196

Solid solution

Answer 197

Liquid crystal

Answer 198

Both oxidized and reduced

Answer 199

Iron oxide

Answer 200

Br is more reactive than Cl₂

Answer 201

None of these

Answer 202

Iodine is a solid

Answer 203

Cl₂ is more insoluble in water

Answer 204

It reacts with chlorine gas

Answer 205

It is used in soda water

Answer 206

It reacts with fats to form soap

Answer 207

It corrodes the organic tissues

Answer 208

Iron from haematite

Answer 209

Ordinary (soda lime) glass

Answer 210

Phosphorus from phosphorite

Answer 211

Solvay process of sodium carbonate

Answer 212

Reduction of calcium chloride with carbon

Answer 213

Roasting lime stone

Answer 214

Electrolysis of solution of calcium chloride in water

Answer 215

Electrolysis of molten anhydrous or fused calcium chloride

Answer 216

Hydration energies of cations

Answer 217

Entropy of solution formation

Answer 218

Lattice energy solids

Answer 219

Inter – ionic attraction

Answer 220

Marshall’s acid

Answer 221

Sulphuric acid

Answer 222

None of these

Answer 223

Carlo’s acid

Answer 224

Linear, basic

Answer 225

Angular, disc

Answer 226

Linear acidic

Answer 227

Tetrahedral, acidic

Answer 228

Nitrogen dioxide

Answer 229

Dinitrogen tetraoxide

Answer 230

Nitrous oxide

Answer 231

Nitric oxide

Answer 232

Plastic sulphur

Answer 233

Monoclinic sulphur

Answer 234

Rhombic sulphur

Answer 235

Prismatic sulphur

Answer 236

None of these

Answer 237

Tetrahedral

Answer 238

Distorted octahedral

Answer 239

Acid decomposes water

Answer 240

It hydrolyses the acid

Answer 241

Acid forms hydrates with water

Answer 242

It decomposes the acid

Answer 243

Pyrosulphuric acid

Answer 244

Dithionic acid

Answer 245

Carlo’s acid

Answer 246

Sulphurous acid

Answer 247

None of these

Answer 248

Ionic and liquid

Answer 249

Covalent and liquid

Answer 250

Ionic and gas

Answer 251

Element sodium can be prepared and isolated by electrolyzed an aqueous solution of NaCl.

Answer 252

Elemental Na is a strong oxidizing agent

Answer 253

Elemental Na is easily oxidized

Answer 254

Elemental Na is insoluble in NH₃

Answer 255

More than O but less than Se

Answer 256

Less than O but more than SE

Answer 257

Equal to O and Se

Answer 258

More than O and Se

Answer 259

Oxyborates

Answer 260

Displacement methods

Answer 261

Reduction methods

Answer 262

Electrolytic methods

Answer 263

Double decomposition methods

Answer 264

Higher co-ordination can be achieved by Al

Answer 265

Al has high ionization energy

Answer 266

It cannot form a trimer

Answer 267

Al belongs to third group

Answer 268

Manganese dioxide

Answer 269

Mercuric oxide

Answer 270

Potassium chlorate

Answer 271

Lead nitrate

Answer 272

Calcium oxide

Answer 273

Calcium carbonate

Answer 274

Sodium bicarbonate

Answer 275

Sodium carbonate

Answer 276

All the halogens have electronic configuration ns2P5

Answer 277

All are non-metals

Answer 278

All the halogens react with noble gases to form their halides

Answer 279

They have high electron affinity and ionization energy

Answer 280

Tetrahedral

Answer 281

Magnesium only

Answer 282

Potassium only

Answer 283

Magnesium and chlorine

Answer 284

Potassium and magnesium

Answer 285

All the three

Answer 286

Reducing agent

Answer 287

Oxidizing agent

Answer 288

Electron affinity

Answer 289

Energy dissociation

Answer 290

High atomic number

Answer 291

Hydration energy of ion

Answer 292

It is a gas at room temperature

Answer 293

It forms R₂O₃

Answer 294

It forms RX₂

Answer 295

It has oxidation state of +4

Answer 296

Insecticide

Answer 297

Refrigerant

Answer 298

Less soluble in water

Answer 299

Insoluble in water

Answer 300

Highly soluble in water

Answer 301

Variable trend

Answer 302

Low electronegativity

Answer 303

Lower electro positivity

Answer 304

Low charge density

Answer 305

Electro negativity

Answer 306

First ionization energy

Answer 307

Melting point

Answer 308

Ionic radius

Answer 309

Various forms

Answer 310

Diatomic molecules

Answer 311

Cannot be predicted

Answer 312

Monoatomic molecules

Answer 313

Tetrabasic

Answer 314

Ca and CO₂

Answer 315

Both are found together in nature

Answer 316

Both have nearly the same size

Answer 317

Both have similar electronic configurations

Answer 318

The ratio of their charge to size is nearly the same

Answer 319

Frank land

Answer 320

J.J Thomson

Answer 321

Chlorination

Answer 322

Hydrogenation

Answer 323

I₂ > Br₂ > Cl₂ > F₂

Answer 324

Br₂ > Cl₂ > F₂ > I₂

Answer 325

Cl₂ > Br₂ > I₂ > F₂

Answer 326

F₂ > Cl₂ > Br₂ > I₂

Answer 327

It has highest first ionization energy

Answer 328

It has highest electronegativity

Answer 329

It restricts to oxidation state – 1 only

Answer 330

It is more reactive than other halogens

Answer 331

Magnallium is one alloy of Mg and zinc

Answer 332

Magnesium reacts with cold water and liberates hydrogen

Answer 333

In the Castner process of sodium extraction, NaCl is used as an electrolyte

Answer 334

Sodium reduces CO₂ to carbon

Answer 335

Noble gases have low m.p and b.p.

Answer 336

None of these

Answer 337

Noble gases will all burn in pure oxygen

Answer 338

Noble gases are all dense gases

Answer 339

Greater hardness of Li

Answer 340

Hydration of Li⁺ ion

Answer 341

Extremely high electropositivity of Li

Answer 342

Small size of lithium atom and Li⁺ ion

Answer 343

Their ions are isoelectronic with noble gases

Answer 344

High ionization energy

Answer 345

Low electronegativity

Answer 346

Low melting point

Answer 347

Violet phosphorus

Answer 348

Red phosphorus

Answer 349

White phosphorus

Answer 350

Scarlet phosphorus

Answer 351

‘Li’ has a great tendency to form hydrates

Answer 352

‘Li’ combine with nitrogen directly to form Lithium nitride

Answer 353

‘Li’ is not effected by air

Answer 354

When burn in oxygen, ‘Li’ forms super oxide LiO₂

Answer 355

I₂>F₂>Br₂>U₂

Answer 356

I₂>Br₂>U₂>F₂

Answer 357

F₂>Cl₂>Br₂>I2

Answer 358

U₂>Br₂>I₂>F₂

Answer 359

Carbon dioxide

Answer 360

Sulphur dioxide

Answer 361

It oxidizes potassium iodide

Answer 362

It oxidizes lead sulphides

Answer 363

It cannot act as a bleaching agent

Answer 364

It oxidizes mercury

Answer 365

It is manufactured by electrolysis of aqueous magnesium chloride

Answer 366

It is more electropositive than sodium

Answer 367

It resembles, in chemical properties, with its diagonally placed element Boron in III group of the Periodic Table

Answer 368

It is a strong reducing agent

Answer 369

Remains unchanged

Answer 370

Variation is not regular

Answer 371

Decreases down the group

Answer 372

Increases down the group

Answer 373

Alkali metals

Answer 374

Alkaline earth metals

Answer 375

Inert gases

Answer 376

Sp³- hybridization

Answer 377

Sp-hybridisation

Answer 378

Sp³d²-hybridisation

Answer 379

Sp²-hybridisation

Answer 380

Effective nuclear charge increases

Answer 381

Atomic number increases

Answer 382

Atomic mass increases

Answer 383

Additive electrons are accommodated in new electron level

Answer 384

Chromic chloride

Answer 385

Chromyl chloride

Answer 386

Chromous chloride

Answer 387

Oxygen family

Answer 388

Nitrogen family

Answer 389

Alkali metals

Answer 390

A sulphate

Answer 391

A carbonate

Answer 392

Nitrogen is much less soluble in blood than helium

Answer 393

Helium is much less soluble in blood than nitrogen

Answer 394

Nitrogen is highly soluble in water

Answer 395

Under the sea nitrogen and oxygen react to give poisonous nitric oxide

Answer 396

Fluoride ion

Answer 397

Chloride ion

Answer 398

Nitride ion

Answer 399

Sodium ion

Answer 400

2NaOH + CO₂ → Na₂CO₃ + H₂O

Answer 401

NH₃ + H₂CO₃ → NH₄HCO₃

Answer 402

CO₃ + H₂O → H₂CO₃

Answer 403

NaCl + NH₄HCO₃ → NaHCO₃ + NH₄Cl

Answer 404

Large size

Answer 405

Higher I-P

Answer 406

Zero electron affinity

Answer 407

Low ∆H lattice

Answer 408

High ∆H lattice

Answer 409

High covalent nature

Answer 410

Small ionic size of Li⁺

Answer 411

Loses water of crystallization

Answer 412

Absorbs moisture and turn into liquid

Answer 413

Absorbs moisture and remain solid

Answer 414

Increases the water of crystallization

Answer 415

Tri-calcium aluminate

Answer 416

Diclacium silicate

Answer 417

Tri-calcium silicate

Answer 418

Tetra calcium aluminoferrite

Answer 419

Gain 2 electrons

Answer 420

Lose 3 electrons

Answer 421

Gain 3 electrons

Answer 422

Lose 2 electrons

Answer 423

+2, +4, +6

Answer 424

-2, +2, +6

Answer 425

Leather printing

Answer 426

Paper printing

Answer 427

Cloth printing

Answer 428

Glass printing

Answer 429

Heat of hydration

Answer 430

Heat of dissociation

Answer 431

Ionization potential

Answer 432

Electron affinity

Answer 433

Borazole is polar compound

Answer 434

Borazole is nonpolar compound

Answer 435

Of localized electrons in it

Answer 436

Borazole is electron deficient compound

Answer 437

Sodium silicate and aluminum borosilicate

Answer 438

Sodium silicate and lead silicate

Answer 439

Sodium silicate and calcium silicate

Answer 440

Sodium borosilicate and aluminum borosilicate

Answer 441

F > Cl > Br

Answer 442

F > Br > Cl

Answer 443

Br > Cl > F

Answer 444

Cl > F > Br

Answer 445

Anhydrous calcium chloride

Answer 446

Active charcoal

Answer 447

Phosphorus pentoxidse

Answer 448

Na₃PO₄

Answer 449

Reaction with CO₂

Answer 450

Reaction with NaOH

Answer 451

Reaction with brine solution

Answer 452

Presence of NH₃

Answer 453

None of these

Answer 454

Three layers are maintained at different temperatures

Answer 455

There is special arrangement is cell to keep the layers separate

Answer 456

Three layers have different densities

Answer 457

The upper layer is kept attracted by cathode and lower layer is kept attracted by anode

Answer 458

Nitrosyl chloride

Answer 459

Nitrogen trichloride

Answer 460

Hyponitrous acid

Answer 461

Phosphorus trichloride

Answer 462

CaSO₄.2H₂O

Answer 463

CaSO₄. 3H₂O

Answer 464

CaSO₄. 1/2H₂O

Answer 465

Expense, but a very uncreative gas

Answer 466

Less dense then air and not flammable

Answer 467

Expensive but easy to store in cylinder

Answer 468

Lighter than air and cheap to produce

Answer 469

None of these

Answer 470

There is increase in the nuclear charge of the alkaline earth metals

Answer 471

There is decrease in the nuclear charge of the alkaline earth metals

Answer 472

There is no change in the nuclear charge

Answer 473

Plaster of Pairs can be obtained by partial oxidation of gypsum

Answer 474

Gypsum is obtained by heating plaster of pairs

Answer 475

Gypsum contains a lower percentage of calcium than plaster of pairs

Answer 476

Plaster of Paris is obtained by partial oxidation of gypsum

Answer 477

Atomic radius

Answer 478

Ionization energy

Answer 479

Electro negativity

Answer 480

There is a regular gradation of properties from top to bottom

Answer 481

Marked change of properties

Answer 482

Abrupt change of properties

Answer 483

Whole group consist of non-metals

Answer 484

Hypo phosphorous acid

Answer 485

Pyro phosphoric acid

Answer 486

Metaphosphoric acid

Answer 487

Orthophosphoric acid

Answer 488

Bauxite contains maximum of Al

Answer 489

Bauxite is less impure

Answer 490

Bauxite is available in large quantity

Answer 491

Of easy extraction of Al from it

Answer 492

Ferrous ammonium sulphate

Answer 493

Magnesium ammonium phosphate

Answer 494

Calcium sulphates

Answer 495

Magnesium sulphates

Answer 496

Radioactive

Answer 497

Metalloids

Answer 498

Polymorphic

Answer 499

Non-metals

Answer 500

Plaster of Paris

Answer 501

Epsom salt

Answer 502

Simple distillation of water

Answer 503

Removing impurities of calcium and magnesium form water

Answer 504

Prolonged electrolysis of water

Answer 505

Dissolving heavy salt in water

Answer 506

Al > Mg > Na > Si

Answer 507

Si > Mg > Al > Na

Answer 508

Mg > Na > Al > Si

Answer 509

Na > Mg > Al > Si

Answer 510

Weak acid and weak base

Answer 511

Weak acid and strong base

Answer 512

Strong acid and strong base

Answer 513

Strong acid and weak base

Answer 514

Hydrogen chloride over phosphorus pentoxide

Answer 515

Chlorine and oxygen over hot silver chlorate

Answer 516

Chlorine gas over hot HgO

Answer 517

Perchloric acid (CHIO₄) over hot silver oxide

Answer 518

Castner Kellner cell

Answer 519

Castner cell

Answer 520

Solvay process

Answer 521

Down’s cell

Answer 522

Thionyl chloride

Answer 523

Sulphuryl chloride

Answer 524

Sulphur monochloride

Answer 525

Sulphur tetrachloride

Answer 526

Melting and boiling points of alkali metals decrease down the group

Answer 527

Sodium is the not most abundant metal in earth’s crust

Answer 528

Ionic character of alkali metal halides decreases down the group

Answer 529

Sodium is the most abundant metallic element in sea water

Answer 530

Chlorophyll

Answer 531

Haemoglobin

Answer 532

It changes into calcium chloride and calcium chlorate

Answer 533

It changes into CaCl₂ and Ca(OH)₂

Answer 534

It change into calcium hypochlorate

Answer 535

It absorbs moisture

Answer 536

They can mutually displace each other from the solution of their compounds with metals

Answer 537

They are all diatomic and form univalent ions

Answer 538

They are all capable of exhibiting several oxidation states

Answer 539

They are all diatomic and form divalent ions

Answer 540

Coordinate

Answer 541

Heavy metals

Answer 542

Noble gases

Answer 543

Light metals

Answer 544

Entropy of solution formation

Answer 545

Inter ionic attraction

Answer 546

Lattice energies if solids

Answer 547

Hydration energies of cations

Answer 548

Inner transition elements

Answer 549

Representative elements

Answer 550

Transition elements

Answer 551

Mark the ship lighter

Answer 552

To prevent the action of water and salt

Answer 553

Keep away the sharks

Answer 554

Prevent puncturing by under sea rock

Answer 555

It possess hydrogen bonding

Answer 556

It has metallic bond

Answer 557

It is highly electronegative

Answer 558

Its molecule has a large size

Answer 559

They contain only one electron in their outermost shell

Answer 560

Their ionization potential is less than that of other elements

Answer 561

They are far above the hydrogen in electrochemical series based on oxidation potential

Answer 562

They are far below the hydrogen in electrochemical series based on oxidation potential

Answer 563

None of these

Answer 564

Radish brown

Answer 565

Colourless

Answer 566

Bluish green

Answer 567

Small ionic size

Answer 568

Metallic properties

Answer 569

Strongly bond valence electrons

Answer 570

Large atomic size

Answer 571

Diatomic molecules

Answer 572

Atoms linked by weak bonds

Answer 573

Triatomic molecules

Answer 574

Single free atoms

Answer 575

Gallium and Germanium

Answer 576

Iron and sulphur

Answer 577

Aluminum and silicon

Answer 578

Proton and silicon

Answer 579

Ca(CN)₂ + C

Answer 580

CaC₂ + C

Answer 581

CaCN₂ + C

Answer 582

37, 19, 3, 55

Answer 583

9, 17, 35, 53

Answer 584

1, 12, 30, 4, 62

Answer 585

12, 20, 56, 88

Answer 586

Ca₃(PO₄)₂

Answer 587

As a drying agent

Answer 588

In metallurgical process

Answer 589

As a plaster for walls

Answer 590

In dentistry and surgery

Answer 591

Decrease in resistance with increase in temperature

Answer 592

Different resistance under different circumstance

Answer 593

Decease in resistance with intensity of light

Answer 594

Increase in resistance with increase in temperature

Answer 595

Ar is used in electric bulbs

Answer 596

HE is used in producing very low temperatures

Answer 597

Half-life of Rn is only 3-8 days

Answer 598

Ne is obtained during radioactive disintegration

Answer 599

d-orbitals

Answer 600

p-orbitals

Answer 601

s-orbitals

Answer 602

Li₂CO₃ is soluble in water

Answer 603

Carbonates of Ca, Ba, Sr are soluble in water

Answer 604

Basic carbonates of Mg and Cu are soluble in water

Answer 605

Carbonates of Na, K, NH₄ are soluble in water

Answer 606

Carnallite

Answer 607

Common salt

Answer 608

Mixture of argon and oxygen

Answer 609

Mixture of xenon and nitrogen

Answer 610

Mixture of helium and oxygen

Answer 611

Mixture of neon and oxygen

Answer 612

Chalcopyrites

Answer 613

In the atmosphere

Answer 614

As salts in ponds

Answer 615

The lattice energy of BaSO₄ is more than its hydration energy

Answer 616

Both a and b

Answer 617

The hydration energy of Na₂SO₄ is more than its lattice energy

Answer 618

The lattice energy has no role to play in solubility

Answer 619

Hypo phosphorous acid

Answer 620

Phosphorous acid

Answer 621

Orthophosphoric acid

Answer 622

Hypo phosphoric acid

Answer 623

Solvated electrons

Answer 624

Sodium atoms

Answer 625

Sodium amide

Answer 626

Sodium hydride

Answer 627

Low first ionization energy

Answer 628

High dissociation energy

Answer 629

Small size

Answer 630

HF molecules form intermolecular H-bonds

Answer 631

Fluorine atom is smaller in size

Answer 632

HF is the weakest acid

Answer 633

Fluorine is highly reactive

Answer 634

Picture printed

Answer 635

The colour of picture

Answer 636

Developing picture

Answer 637

The fixation of picture

Answer 638

Ozone is more reactive than dioxygen

Answer 639

Ozone is diamagnetic whereas dioxygen is paramagnetic

Answer 640

Ozone protects the earth’s inhabitants by absorbing gamma-radiations

Answer 641

Ozone is formed in the upper atmosphere by a photochemical reaction involving dioxygen

Answer 642

None of these

Answer 643

H. bonding

Answer 644

Dipole-dipole forces

Answer 645

Strongest vanderwaal’s force

Answer 646

None of these

Answer 647

Atomic masses

Answer 648

Nuclear neutron-proton number rations

Answer 649

Atomic numbers

Answer 650

Nuclear masses

Answer 651

Sulphur is present in the mixture as impurity

Answer 652

IV group radicals are precipitated as sulphides

Answer 653

III group radicals are precipitated as hydroxides

Answer 654

Of the oxidation of H₂S gas by some acid radicals

Total Questions:	330
Time Allowed:	80 Minutes
Total Marks:	330
How to Attempt Test:	Please choose the right Option in MCQ-type question.
Test Helpful For:	Chemistry Test ECAT Test MDCAT Test FPSC/PPSC/SPSC/KPPSC/BPSC/AJKPSC/NTS Chemistry Interview Question Answer

Chemistry The Halogens and Noble Gases Online Mcqs Test

Important Chemistry The Halogens and Noble Gases Question and Answer

Chemistry The Halogens and Noble Gases Practice Test Online With Explanation

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How to Score High in Chemistry The Halogens and Noble Gases Online Mcqs Test?

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Important Chemistry The Halogens and Noble Gases Question and Answer

Chemistry The Halogens and Noble Gases Practice Test Online With Explanation

Chemistry

How to Score High in Chemistry The Halogens and Noble Gases Online Mcqs Test?

Key Preparation Tips:

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Malik Tahir

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