Chemistry The Halogens and Noble Gases Online Mcqs Test

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Question 1

1. Among the alkaline earth metals the element forming predominantly covalent compound is

Question 2

2. Mg is an important component of which biomolecule occurring extensively in living world?

Answer

Haemoglobin

Answer

Chlorophyll

Question 3

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

Answer

The basic character of the oxides

Answer

The first ionization energy

Answer

Ionic character of the compound

Answer

The stability of +2 oxidation state

Question 4

4. The bleaching action of chlorine is due to

Answer

Hydrogenation

Answer

Chlorination

Question 5

5. Mark the correct statement

Answer

None of these

Answer

Iodine is a solid

Answer

Br is more reactive than Cl₂

Answer

Cl₂ is more insoluble in water

Question 6

6. Which of the following is the lifesaving mixture for an asthma patient?

Answer

Mixture of xenon and nitrogen

Answer

Mixture of helium and oxygen

Answer

Mixture of argon and oxygen

Answer

Mixture of neon and oxygen

Question 7

7. Elements of which of the following groups will from anions most readily?

Answer

Oxygen family

Answer

Nitrogen family

Answer

Alkali metals

Question 8

8. Among HCL, HBr and Hl, Hi shows highest B.P due to

Answer

Dipole-dipole forces

Answer

Strongest vanderwaal’s force

Answer

None of these

Answer

H. bonding

Question 9

9. Sea weeds are important source of

Question 10

10. Several blocks of magnesium are fixed to the bottom of a ship to

Answer

Mark the ship lighter

Answer

To prevent the action of water and salt

Answer

Prevent puncturing by under sea rock

Answer

Keep away the sharks

Question 11

11. The noble gas forming the maximum number of compounds

Question 12

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

Answer

Weak oxidizing agents

Answer

Weak reducing agents

Answer

Strong oxidizing agents

Answer

Strong reducing agents

Question 13

13. To a clear solution of compound (X) a solution of BaCl₂ is added and a heavy white precipitate is formed which does not dissolve in dilute HCl. The compound X is

Answer

A sulphate

Answer

A carbonate

Question 14

14. Alkaline earth metals comes under

Answer

Representative elements

Answer

Transition elements

Answer

Inner transition elements

Question 15

15. Which of the following element has the maximum electron affinity?

Question 16

16. Which one is the biggest ion?

Question 17

17. Which of the following species has the highest ionization potential?

Question 18

18. Lithium is strongest reducing agent among alkali metals due to which of the following factor?

Answer

Electron affinity

Answer

Hydration energy

Answer

Lattice energy

Answer

Ionization energy

Question 19

19. Which of the following is correct?

Answer

Magnesium reacts with cold water and liberates hydrogen

Answer

Sodium reduces CO₂ to carbon

Answer

Magnallium is one alloy of Mg and zinc

Answer

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

Question 20

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

Question 21

21. Which of the following is most volatile?

Question 22

22. Which one of the following substances is used in the laboratory for a fast drying of neutral gases?

Answer

Phosphorus pentoxidse

Answer

Anhydrous calcium chloride

Answer

Na₃PO₄

Answer

Active charcoal

Question 23

23. Which of the following has highest first ionization potential?

Question 24

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

Answer

Phosphorus

Question 25

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

Answer

Keeping it cool

Answer

Developing interlocking needle like crystals of hydrated silicates

Answer

Converting sand into silici acid

Answer

Hydrating sand and gravel mixed with cement

Question 26

26. Orthophosphoric acid is

Answer

Tetrabasic

Question 27

27. Bleaching powder loses its power on keeping for a long time because

Answer

It changes into CaCl₂ and Ca(OH)₂

Answer

It changes into calcium chloride and calcium chlorate

Answer

It absorbs moisture

Answer

It change into calcium hypochlorate

Question 28

28. Which noble gas is used earth quake prediction?

Question 29

29. Limestone is not used in which of the following manufacturing processes?

Answer

Iron from haematite

Answer

Solvay process of sodium carbonate

Answer

Ordinary (soda lime) glass

Answer

Phosphorus from phosphorite

Question 30

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

Answer

Diamagnetic

Answer

Ferromagnetic

Answer

Antiferromagnetic

Answer

Paramagnetic

Question 31

31. The halogen that is most easily reduced is

Question 32

32. Which member of the halogen family (X₂) does not show positive oxidation sate (X⁺₂)?

Question 33

33. Which oxide of nitrogen is obtained on heating ammonium nitrate at 250°C?

Answer

Nitrous oxide

Answer

Nitrogen dioxide

Answer

Nitric oxide

Answer

Dinitrogen tetraoxide

Question 34

34. How does the ionization energy of 1st group elements vary?

Answer

Increases down the group

Answer

Decreases down the group

Answer

Remains unchanged

Answer

Variation is not regular

Question 35

35. Aqueous NaCl solution is electrolyzed using platinum electrodes. What is the product formed at cathode?

Question 36

36. An atom with atomic number 20 is most likely to combine chemically with the atom whose atomic number is

Question 37

37. The one which does not show variable valency is

Question 38

38. The following has zero valency

Question 39

39. The metal used for making radiation shield is

Question 40

40. Which of the following is most electronegative?

Question 41

41. Aluminum is most abundant in earth’s crust, yet it is obtained from bauxite because

Answer

Bauxite contains maximum of Al

Answer

Of easy extraction of Al from it

Answer

Bauxite is less impure

Answer

Bauxite is available in large quantity

Question 42

42. Sodium sulphates is solute in water but barium sulphates is insoluble because

Answer

The hydration energy of Na₂SO₄ is more than its lattice energy

Answer

Both a and b

Answer

The lattice energy of BaSO₄ is more than its hydration energy

Answer

The lattice energy has no role to play in solubility

Question 43

43. Which of the following is an inert gas?

Question 44

44. Vander Waals forces are stronger in

Question 45

45. Which of the following substance is used for drying gases?

Answer

Calcium oxide

Answer

Sodium bicarbonate

Answer

Calcium carbonate

Answer

Sodium carbonate

Question 46

46. Pyrex glass is a mixture of

Answer

Sodium silicate and calcium silicate

Answer

Sodium borosilicate and aluminum borosilicate

Answer

Sodium silicate and lead silicate

Answer

Sodium silicate and aluminum borosilicate

Question 47

47. The elements with atomic numbers 9, 17, 35, 53, 85 and all

Answer

Heavy metals

Answer

Noble gases

Answer

Light metals

Question 48

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

Question 49

49. The type of hybridization of born in diborane is

Answer

Sp-hybridisation

Answer

Sp²-hybridisation

Answer

Sp³- hybridization

Answer

Sp³d²-hybridisation

Question 50

50. In certain respects, lithium differs from other alkali metals. The main reason for this is

Answer

Small size of lithium atom and Li⁺ ion

Answer

Hydration of Li⁺ ion

Answer

Extremely high electropositivity of Li

Answer

Greater hardness of Li

Question 51

51. The lowest boiling point of helium is due to its

Answer

Gaseous nature

Answer

Weak van der Waals forces between atoms

Answer

High polarisability

Question 52

52. One which is not dissolved by dilute hydrochloric acid is

Question 53

53. Bromine is obtained on a commercial scale from

Answer

Common salt

Answer

Carnallite

Question 54

54. AlCl₃ flumes in moist air because

Answer

It is covalent

Answer

HCl is formed in moist air

Answer

It is highly hygroscopic

Answer

It is very volatile

Question 55

55. Electron affinity depends on

Answer

Atomic number

Answer

Nuclear charge

Answer

Atomic size and nuclear charge both

Answer

Atomic size

Question 56

56. The halogen which has only one oxidation state is

Question 57

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

Answer

O₂ and CO₂

Answer

O₂ and Ar

Answer

O₂ and He

Answer

CO₂ and Ar

Question 58

58. The ionization potential is lowest for the

Answer

Alkali metals

Answer

Alkaline earth metals

Answer

Inert gases

Question 59

59. LiF is insoluble in water, while NaF and KF are soluble. This is due to

Answer

Small ionic size of Li⁺

Answer

High ∆H lattice

Answer

Low ∆H lattice

Answer

High covalent nature

Question 60

60. The substance not likely to contain CaCO₃ is

Answer

Sea shells

Answer

A marble states

Answer

Calcried gypsum

Question 61

61. Fluorine differs from other halogens due to

Answer

Small size

Answer

High dissociation energy

Answer

Low first ionization energy

Question 62

62. Which one boric acid is stable one?

Answer

H₂B₄O₇

Answer

None of these

Question 63

63. Which of the following statements is incorrect about halogens?

Answer

They have high electron affinity and ionization energy

Answer

All the halogens react with noble gases to form their halides

Answer

All the halogens have electronic configuration ns2P5

Answer

All are non-metals

Question 64

64. Indicate the correct statement

Answer

Alkali metals do not reacts with metals

Answer

Alkali metals have ns’ configuring in outermost shells

Answer

Alkali metal atom has the smallest size in its period

Answer

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

Answer 142

With halogens

Answer 143

With alkali metals

Answer 144

None of these

Answer 145

With inert gases

Answer 146

Hypochlorous acid

Answer 147

Calcium oxide

Answer 148

Inter ionic attraction

Answer 149

Hydration energies of cations

Answer 150

Lattice energies if solids

Answer 151

Entropy of solution formation

Answer 152

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

Answer 153

Three layers have different densities

Answer 154

Three layers are maintained at different temperatures

Answer 155

There is special arrangement is cell to keep the layers separate

Answer 156

In the atmosphere

Answer 157

As salts in ponds

Answer 158

It is more electropositive than sodium

Answer 159

It is manufactured by electrolysis of aqueous magnesium chloride

Answer 160

It is a strong reducing agent

Answer 161

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

Answer 162

Atomic radius

Answer 163

Boiling point

Answer 164

Ionization energy

Answer 165

Reaction with NaOH

Answer 166

Reaction with brine solution

Answer 167

Reaction with CO₂

Answer 168

Presence of NH₃

Answer 169

Developing picture

Answer 170

The colour of picture

Answer 171

Picture printed

Answer 172

The fixation of picture

Answer 173

Ionic character of alkali metal halides decreases down the group

Answer 174

Melting and boiling points of alkali metals decrease down the group

Answer 175

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

Answer 176

Sodium is the most abundant metallic element in sea water

Answer 177

I₂ > Br₂ > Cl₂ > F₂

Answer 178

Br₂ > Cl₂ > F₂ > I₂

Answer 179

F₂ > Cl₂ > Br₂ > I₂

Answer 180

Cl₂ > Br₂ > I₂ > F₂

Answer 181

Transition elements

Answer 182

Alkali metals

Answer 183

Violet phosphorus

Answer 184

Red phosphorus

Answer 185

Scarlet phosphorus

Answer 186

White phosphorus

Answer 187

Carlo’s acid

Answer 188

None of these

Answer 189

Marshall’s acid

Answer 190

Sulphuric acid

Answer 191

Small size of fluorine

Answer 192

More electron repulsion in fluorine

Answer 193

More electro negativity of fluorine

Answer 194

Non-metallic nature of fluorine

Answer 195

Rhombic sulphur

Answer 196

Monoclinic sulphur

Answer 197

Plastic sulphur

Answer 198

Prismatic sulphur

Answer 199

Borazole is polar compound

Answer 200

Borazole is nonpolar compound

Answer 201

Of localized electrons in it

Answer 202

Borazole is electron deficient compound

Answer 203

Elemental Na is insoluble in NH₃

Answer 204

Elemental Na is easily oxidized

Answer 205

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

Answer 206

Elemental Na is a strong oxidizing agent

Answer 207

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

Answer 208

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

Answer 209

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

Answer 210

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

Answer 211

Additive electrons are accommodated in new electron level

Answer 212

Atomic mass increases

Answer 213

Effective nuclear charge increases

Answer 214

Atomic number increases

Answer 215

Electron affinity

Answer 216

Hydration energy

Answer 217

Energy dissociation

Answer 218

High atomic number

Answer 219

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

Answer 220

Form salt like hydrides

Answer 221

Form salts which are predominantly covalent

Answer 222

Show increasing electro negativity from Li to Cs.

Answer 223

High energies of hydration of M²⁺ in solution

Answer 224

None of these of M²⁺ ions

Answer 225

High lattice energy of M²⁺ ions in the solid state

Answer 226

Diamagnetic nature

Answer 227

Ionization potential

Answer 228

Heat of dissociation

Answer 229

Electron affinity

Answer 230

Heat of hydration

Answer 231

Both are found together in nature

Answer 232

Both have nearly the same size

Answer 233

The ratio of their charge to size is nearly the same

Answer 234

Both have similar electronic configurations

Answer 235

It oxidizes mercury

Answer 236

It oxidizes potassium iodide

Answer 237

It cannot act as a bleaching agent

Answer 238

It oxidizes lead sulphides

Answer 239

Monoatomic

Answer 240

All of these

Answer 241

Polyatomic

Answer 242

Greater amount of nitrogen molecules derived from N¹⁵ isotope

Answer 243

Some nitrogen molecules analogous to O₂

Answer 244

CaSO₄. 3H₂O

Answer 245

CaSO₄.2H₂O

Answer 246

CaSO₄. 1/2H₂O

Answer 247

Sodium atoms

Answer 248

Sodium amide

Answer 249

Sodium hydride

Answer 250

Solvated electrons

Answer 251

Electrolysis of molten anhydrous or fused calcium chloride

Answer 252

Reduction of calcium chloride with carbon

Answer 253

Roasting lime stone

Answer 254

Electrolysis of solution of calcium chloride in water

Answer 255

Nitrogen is much less soluble in blood than helium

Answer 256

Helium is much less soluble in blood than nitrogen

Answer 257

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

Answer 258

Nitrogen is highly soluble in water

Answer 259

Aluminum and silicon

Answer 260

Gallium and Germanium

Answer 261

Proton and silicon

Answer 262

Iron and sulphur

Answer 263

None of these

Answer 264

Reducing agents

Answer 265

Hydrolyzing agents

Answer 266

Oxidizing agents

Answer 267

Both oxidizing and reducing agents

Answer 268

Pyrosulphuric acid

Answer 269

Sulphurous acid

Answer 270

Carlo’s acid

Answer 271

Dithionic acid

Answer 272

There is a regular gradation of properties from top to bottom

Answer 273

Abrupt change of properties

Answer 274

Whole group consist of non-metals

Answer 275

Marked change of properties

Answer 276

s-orbitals

Answer 277

p-orbitals

Answer 278

d-orbitals

Answer 279

It possess hydrogen bonding

Answer 280

Its molecule has a large size

Answer 281

It is highly electronegative

Answer 282

It has metallic bond

Answer 283

Cage compound

Answer 284

Liquid crystal

Answer 285

Solid solution

Answer 286

Energy dissociation

Answer 287

High atomic number

Answer 288

Electron affinity

Answer 289

Hydration energy of ion

Answer 290

Low electron affinity

Answer 291

Low ionization potential

Answer 292

Large size

Answer 293

High ionization potential

Answer 294

Equal to O and Se

Answer 295

Less than O but more than SE

Answer 296

More than O and Se

Answer 297

More than O but less than Se

Answer 298

Perchloric acid (CHIO₄) over hot silver oxide

Answer 299

Chlorine and oxygen over hot silver chlorate

Answer 300

Hydrogen chloride over phosphorus pentoxide

Answer 301

Chlorine gas over hot HgO

Answer 302

Displacement methods

Answer 303

Double decomposition methods

Answer 304

Reduction methods

Answer 305

Electrolytic methods

Answer 306

Acidic nature

Answer 307

Electron deficiency

Answer 308

Covalent nature

Answer 309

Ionization property

Answer 310

Removing impurities of calcium and magnesium form water

Answer 311

Simple distillation of water

Answer 312

Dissolving heavy salt in water

Answer 313

Prolonged electrolysis of water

Answer 314

Refrigerant

Answer 315

Insecticide

Answer 316

Converting silver halides to metallic silver

Answer 317

Dissolving out unreacted silver bromide

Answer 318

Reducing solubility of AgBr

Answer 319

Preventing overdeveloping and fogging

Answer 320

To act as reducing agent

Answer 321

To protect the anodes

Answer 322

To increase Al production

Answer 323

To make a conducting solution of bauxite

Answer 324

Sulphur monochloride

Answer 325

Thionyl chloride

Answer 326

Sulphur tetrachloride

Answer 327

Sulphuryl chloride

Answer 328

It is used in soda water

Answer 329

It corrodes the organic tissues

Answer 330

It reacts with chlorine gas

Answer 331

It reacts with fats to form soap

Answer 332

F > Cl > Br

Answer 333

F > Br > Cl

Answer 334

Cl > F > Br

Answer 335

Br > Cl > F

Answer 336

Iodine solution

Answer 337

37, 19, 3, 55

Answer 338

12, 20, 56, 88

Answer 339

9, 17, 35, 53

Answer 340

1, 12, 30, 4, 62

Answer 341

Tetrahedral

Answer 342

Sodium ion

Answer 343

Chloride ion

Answer 344

Fluoride ion

Answer 345

Nitride ion

Answer 346

Metallic properties

Answer 347

Large atomic size

Answer 348

Strongly bond valence electrons

Answer 349

Small ionic size

Answer 350

Carbon dioxide

Answer 351

Sulphur dioxide

Answer 352

Zero electron affinity

Answer 353

Large size

Answer 354

Higher I-P

Answer 355

Hypo phosphorous acid

Answer 356

Metaphosphoric acid

Answer 357

Orthophosphoric acid

Answer 358

Pyro phosphoric acid

Answer 359

Reducing agent

Answer 360

Oxidizing agent

Answer 361

All the three

Answer 362

Carbonates of Na, K, NH₄ are soluble in water

Answer 363

Li₂CO₃ is soluble in water

Answer 364

Basic carbonates of Mg and Cu are soluble in water

Answer 365

Carbonates of Ca, Ba, Sr are soluble in water

Answer 366

Absence of bond polarity

Answer 367

Multiple bond formation in the molecule

Answer 368

High bond energy

Answer 369

Short internuclear distance

Answer 370

U₂>Br₂>I₂>F₂

Answer 371

I₂>F₂>Br₂>U₂

Answer 372

F₂>Cl₂>Br₂>I2

Answer 373

I₂>Br₂>U₂>F₂

Answer 374

SO₃ is insoluble in H₂O

Answer 375

The reaction does not go to completion

Answer 376

The reaction is quite slow

Answer 377

The reaction is highly exothermic

Answer 378

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

Answer 379

They are all diatomic and form univalent ions

Answer 380

They are all capable of exhibiting several oxidation states

Answer 381

They are all diatomic and form divalent ions

Answer 382

Variable trend

Answer 383

Insoluble in water

Answer 384

Highly soluble in water

Answer 385

Less soluble in water

Answer 386

Tetra calcium aluminoferrite

Answer 387

Tri-calcium aluminate

Answer 388

Tri-calcium silicate

Answer 389

Diclacium silicate

Answer 390

Oxidizing as well as reducing agents

Answer 391

Drying agents

Answer 392

Reducing agents

Answer 393

Oxidizing agents

Answer 394

Radioactive

Answer 395

Non-metals

Answer 396

Polymorphic

Answer 397

Metalloids

Answer 398

Frank land and Lockyer

Answer 399

Rutherford

Answer 400

Ca and CO₂

Answer 401

CaO has high m.p.

Answer 402

Kl has high m.p.

Answer 403

Kl is soluble in benzene

Answer 404

Lattice energy of CaO is much higher than that of Kl

Answer 405

Hypo phosphoric acid

Answer 406

Hypo phosphorous acid

Answer 407

Phosphorous acid

Answer 408

Orthophosphoric acid

Answer 409

Lose 2 electrons

Answer 410

Lose 3 electrons

Answer 411

Gain 3 electrons

Answer 412

Gain 2 electrons

Answer 413

Linear acidic

Answer 414

Tetrahedral, acidic

Answer 415

Angular, disc

Answer 416

Linear, basic

Answer 417

Sodium atoms

Answer 418

Sodium hydride

Answer 419

Solvated electrons

Answer 420

Sodium amide

Answer 421

It has highest first I.E

Answer 422

It has highest E.N

Answer 423

It is more reactive than other halogens

Answer 424

It restricts to oxidation state – 1 only

Answer 425

Sulphur is present in the mixture as impurity

Answer 426

IV group radicals are precipitated as sulphides

Answer 427

Of the oxidation of H₂S gas by some acid radicals

Answer 428

III group radicals are precipitated as hydroxides

Answer 429

Ca₃(PO₄)₂

Answer 430

Potassium only

Answer 431

Magnesium only

Answer 432

Potassium and magnesium

Answer 433

Magnesium and chlorine

Answer 434

Iron oxide

Answer 435

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

Answer 436

None of these

Answer 437

Noble gases are all dense gases

Answer 438

Noble gases will all burn in pure oxygen

Answer 439

Leads to the dissolution of beryllium metal

Answer 440

Precipitate Mg metal

Answer 441

Have no effect

Answer 442

Precipitate Mg

Answer 443

‘Li’ combine with nitrogen directly to form Lithium nitride

Answer 444

‘Li’ is not effected by air

Answer 445

‘Li’ has a great tendency to form hydrates

Answer 446

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

Answer 447

Different resistance under different circumstance

Answer 448

Increase in resistance with increase in temperature

Answer 449

Decrease in resistance with increase in temperature

Answer 450

Decease in resistance with intensity of light

Answer 451

Plaster of Paris is obtained by partial oxidation of gypsum

Answer 452

Gypsum is obtained by heating plaster of pairs

Answer 453

Gypsum contains a lower percentage of calcium than plaster of pairs

Answer 454

Plaster of Pairs can be obtained by partial oxidation of gypsum

Answer 455

Al₂(OH)₄

Answer 456

Na₂Al(OH)₄

Answer 457

Na₃AlO₃

Answer 458

Epsom salt

Answer 459

Plaster of Paris

Answer 460

It cannot form a trimer

Answer 461

Al belongs to third group

Answer 462

Al has high ionization energy

Answer 463

Higher co-ordination can be achieved by Al

Answer 464

Melting point

Answer 465

First ionization energy

Answer 466

Ionic radius

Answer 467

Electro negativity

Answer 468

Crooke’s glass

Answer 469

Flint glass

Answer 470

Soda glass

Answer 471

Borosilicate glass

Answer 472

Smaller ionic radii

Answer 473

Highest boiling points

Answer 474

Greater hardness

Answer 475

Lower ionization energies

Answer 476

Sodium azide

Answer 477

Sodium hydride

Answer 478

Sodium nitride

Answer 479

Sodium amide

Answer 480

Both oxidized and reduced

Answer 481

Atomic number

Answer 482

Atomic mass

Answer 483

Mass number

Answer 484

Isotopic number

Answer 485

Fluorine cannot be prepared by electrolysis of fused metal fluorides

Answer 486

Bond energy of fluorine is less than that of chlorine

Answer 487

Fluorine does not form oxoacid

Answer 488

Electron affinity of chlorine is greater than that of fluorine

Answer 489

Low charge density

Answer 490

Low electronegativity

Answer 491

Lower electro positivity

Answer 492

Decrease in I.P

Answer 493

Increase in atomic size of elements

Answer 494

All of these

Answer 495

Decrease in electronegativity of the elements

Answer 496

Phosphorus trichloride

Answer 497

Nitrosyl chloride

Answer 498

Nitrogen trichloride

Answer 499

Hyponitrous acid

Answer 500

Coordinate

Answer 501

Chalcopyrites

Answer 502

Na > Mg > Al > Si

Answer 503

Mg > Na > Al > Si

Answer 504

Si > Mg > Al > Na

Answer 505

Al > Mg > Na > Si

Answer 506

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

Answer 507

They contain only one electron in their outermost shell

Answer 508

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

Answer 509

Their ionization potential is less than that of other elements

Answer 510

Low melting point

Answer 511

High ionization energy

Answer 512

Their ions are isoelectronic with noble gases

Answer 513

Low electronegativity

Answer 514

Magnesium ammonium phosphate

Answer 515

Ferrous ammonium sulphate

Answer 516

Magnesium sulphates

Answer 517

Calcium sulphates

Answer 518

Cannot be predicted

Answer 519

As a plaster for walls

Answer 520

As a drying agent

Answer 521

In metallurgical process

Answer 522

In dentistry and surgery

Answer 523

It decreases gradually down the group

Answer 524

Noble gases have o heat of vapourization

Answer 525

It increases gradually down the group

Answer 526

None of these

Answer 527

Mercuric oxide

Answer 528

Lead nitrate

Answer 529

Manganese dioxide

Answer 530

Potassium chlorate

Answer 531

Atoms of sodium and chlorine

Answer 532

Free molecules

Answer 533

Free electrons

Answer 534

Ozone is diamagnetic whereas dioxygen is paramagnetic

Answer 535

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

Answer 536

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

Answer 537

Ozone is more reactive than dioxygen

Answer 538

Oxyborates

Answer 539

J.J Thomson

Answer 540

Frank land

Answer 541

Electro negativity

Answer 542

Ionization energy

Answer 543

Atomic radius

Answer 544

Glass printing

Answer 545

Paper printing

Answer 546

Leather printing

Answer 547

Cloth printing

Answer 548

Colourless

Answer 549

Radish brown

Answer 550

Bluish green

Answer 551

nS₂, nP₆

Answer 552

ns₂, nP₅

Answer 553

nS₂, nP₃

Answer 554

NS₂, nP₄

Answer 555

HF is the weakest acid

Answer 556

Fluorine is highly reactive

Answer 557

Fluorine atom is smaller in size

Answer 558

HF molecules form intermolecular H-bonds

Answer 559

Ca(CN)₂ + C

Answer 560

CaCN₂ + C

Answer 561

CaC₂ + C

Answer 562

+2, +4, +6

Answer 563

-2, +2, +6

Answer 564

Solvay process

Answer 565

Castner cell

Answer 566

Down’s cell

Answer 567

Castner Kellner cell

Answer 568

Chromic chloride

Answer 569

Chromous chloride

Answer 570

Chromyl chloride

Answer 571

Absorbs moisture and turn into liquid

Answer 572

Increases the water of crystallization

Answer 573

Absorbs moisture and remain solid

Answer 574

Loses water of crystallization

Answer 575

None of these

Answer 576

Strong acid and strong base

Answer 577

Weak acid and weak base

Answer 578

Strong acid and weak base

Answer 579

Weak acid and strong base

Answer 580

For preparing artificial

Answer 581

As an oxidizer in metallurgy

Answer 582

In form of foil for wrapping

Answer 583

As an abrasive in the form of abundum

Answer 584

It forms R₂O₃

Answer 585

It has oxidation state of +4

Answer 586

It is a gas at room temperature

Answer 587

It forms RX₂

Answer 588

Ar is used in electric bulbs

Answer 589

Half-life of Rn is only 3-8 days

Answer 590

Ne is obtained during radioactive disintegration

Answer 591

HE is used in producing very low temperatures

Answer 592

Ionic and liquid

Answer 593

None of these

Answer 594

Ionic and gas

Answer 595

Covalent and liquid

Answer 596

None of these

Answer 597

It is more reactive than other halogens

Answer 598

It restricts to oxidation state – 1 only

Answer 599

It has highest electronegativity

Answer 600

It has highest first ionization energy

Answer 601

NH₃ + H₂CO₃ → NH₄HCO₃

Answer 602

NaCl + NH₄HCO₃ → NaHCO₃ + NH₄Cl

Answer 603

2NaOH + CO₂ → Na₂CO₃ + H₂O

Answer 604

CO₃ + H₂O → H₂CO₃

Answer 605

Acid decomposes water

Answer 606

It decomposes the acid

Answer 607

It hydrolyses the acid

Answer 608

Acid forms hydrates with water

Answer 609

Monoatomic molecules

Answer 610

Cannot be predicted

Answer 611

Various forms

Answer 612

Diatomic molecules

Answer 613

Atomic radius

Answer 614

Boiling point

Answer 615

Ionization energy

Answer 616

In the most readily available gas

Answer 617

Has the lowest ionization enthalpy

Answer 618

Has the largest size

Answer 619

Has the highest heat of vaporization

Answer 620

Inter – ionic attraction

Answer 621

Lattice energy solids

Answer 622

Hydration energies of cations

Answer 623

Entropy of solution formation

Answer 624

Atomic numbers

Answer 625

Nuclear neutron-proton number rations

Answer 626

Nuclear masses

Answer 627

Atomic masses

Answer 628

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

Answer 629

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

Answer 630

There is no change in the nuclear charge

Answer 631

None of these

Answer 632

O > B > C > N

Answer 633

B > N > C > O

Answer 634

O > C > N > B

Answer 635

O > C > B > N

Answer 636

Lighter than air and cheap to produce

Answer 637

Less dense then air and not flammable

Answer 638

Expense, but a very uncreative gas

Answer 639

Expensive but easy to store in cylinder

Answer 640

Distorted octahedral

Answer 641

None of these

Answer 642

Tetrahedral

Answer 643

Sodium thiosulphate

Answer 644

Sodiums sulphates

Answer 645

Sodium persulphate

Answer 646

Sodium sulphides

Answer 647

It is used in the formation white cement

Answer 648

It is used furniture polish

Answer 649

It is as filter for soap

Answer 650

It is used as fire proof in textile

Answer 651

Single free atoms

Answer 652

Triatomic molecules

Answer 653

Atoms linked by weak bonds

Answer 654

Diatomic molecules

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

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

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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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?

Key Preparation Tips:

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Malik Tahir

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