Chemistry The Halogens and Noble Gases Online Mcqs Test

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Question 1

1. Freon-12 is used as a

Answer

Insecticide

Answer

Refrigerant

Question 2

2. Which of the following metal is present in chlorophyll?

Question 3

3. All the following decompose easily on heating to give oxygen except

Answer

Manganese dioxide

Answer

Lead nitrate

Answer

Potassium chlorate

Answer

Mercuric oxide

Question 4

4. Sea weeds are important source of

Question 5

5. Which of the following has greatest reducing power?

Question 6

6. The oxidizing power of halogens depends upon various factors. Which are not the correct reasons?

Answer

High atomic number

Answer

Hydration energy of ion

Answer

Electron affinity

Answer

Energy dissociation

Question 7

7. Variable valency is characteristic of

Answer

Alkali metals

Answer

Transition elements

Question 8

8. The correct order of electron affinity of B, C, N, O is

Answer

O > C > N > B

Answer

O > B > C > N

Answer

O > C > B > N

Answer

B > N > C > O

Question 9

9. Which of the following does not exhibit the periodicity in properties of the elements?

Answer

Atomic radius

Answer

Electro negativity

Answer

Ionization energy

Question 10

10. Which of the following isoelectronic ions has the lowest ionization energy?

Question 11

11. Which one halogen can show only-1 oxidation state?

Question 12

12. The halogens exist as halides. Which is not common place whose they are found?

Answer

In the atmosphere

Answer

As salts in ponds

Question 13

13. The noble gas He was discovered by

Answer

Rutherford

Answer

Frank land and Lockyer

Question 14

14. Keeping in view the uses of sodium silicate, select the incorrect statement:

Answer

It is used as fire proof in textile

Answer

It is used in the formation white cement

Answer

It is as filter for soap

Answer

It is used furniture polish

Question 15

15. The element with highest electron affinity among the halogen is

Question 16

16. The percentage of lead in lead pencil is

Question 17

17. Which one has highest electron affinity?

Question 18

18. The solubilities of carbonates decrease down the magnesium group due to a decrease in

Answer

Lattice energies if solids

Answer

Inter ionic attraction

Answer

Entropy of solution formation

Answer

Hydration energies of cations

Question 19

19. 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

Ionic character of the compound

Answer

The first ionization energy

Answer

The stability of +2 oxidation state

Question 20

20. Which one of them is monoatomic?

Question 21

21. The important ore of lead is

Answer

Chalcopyrites

Question 22

22. Which one of the following reactions is not associated with the Solvay process of manufacture of sodium carbonate?

Answer

NaCl + NH₄HCO₃ → NaHCO₃ + NH₄Cl

Answer

CO₃ + H₂O → H₂CO₃

Answer

NH₃ + H₂CO₃ → NH₄HCO₃

Answer

2NaOH + CO₂ → Na₂CO₃ + H₂O

Question 23

23. The correct sequence of elements in the decreasing order of first ionization energy is

Answer

Al > Mg > Na > Si

Answer

Na > Mg > Al > Si

Answer

Mg > Na > Al > Si

Answer

Si > Mg > Al > Na

Question 24

24. In Solvay ammonia process, sodium bicarbonate is precipitated due to

Answer

Reaction with brine solution

Answer

Presence of NH₃

Answer

Reaction with CO₂

Answer

Reaction with NaOH

Question 25

25. In the manufacture of bromine form sea water, the mother liquor containing bromides is treated with

Answer

Carbon dioxide

Answer

Sulphur dioxide

Question 26

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

Question 27

27. Point out the property which is not characteristic of alkali metals

Answer

Low melting point

Answer

Their ions are isoelectronic with noble gases

Answer

High ionization energy

Answer

Low electronegativity

Question 28

28. Which one of these is most reactive?

Question 29

29. 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 30

30. The ionization potential is lowest for the

Answer

Alkaline earth metals

Answer

Alkali metals

Answer

Inert gases

Question 31

31. Nitrolim is

Answer

CaCN₂ + C

Answer

CaC₂ + C

Answer

Ca(CN)₂ + C

Question 32

32. Which of the following is true for magnesium?

Answer

It is more electropositive than sodium

Answer

It is a strong reducing agent

Answer

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

Answer

It is manufactured by electrolysis of aqueous magnesium chloride

Question 33

33. The most acidic of the following compounds is

Question 34

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

Question 35

35. What is more true about alkali metals?

Answer

Oxidizing agents

Answer

Hydrolyzing agents

Answer

Both oxidizing and reducing agents

Answer

Reducing agents

Question 36

36. The correct order of electron affinity among the following is

Answer

F > Cl > Br

Answer

Cl > F > Br

Answer

F > Br > Cl

Answer

Br > Cl > F

Question 37

37. Which halogen has application in medicines mostly?

Question 38

38. NaOH is prepared by the method

Answer

Castner cell

Answer

Down’s cell

Answer

Solvay process

Answer

Castner Kellner cell

Question 39

39. Which halogen is most electropositive?

Question 40

40. Which of the following halogen does not exhibit positive oxidation state in its compounds?

Question 41

41. Which is the gas among the following that reacts with H₂ is darkness?

Question 42

42. Molten sodium chloride conducts electricity due to the presence of

Answer

Free molecules

Answer

Atoms of sodium and chlorine

Answer

Free electrons

Question 43

43. Which of the following halogens dose not form oxy acid?

Question 44

44. Which statement is correct about halogens?

Answer

They are all capable of exhibiting several oxidation states

Answer

They are all diatomic and form univalent ions

Answer

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

Answer

They are all diatomic and form divalent ions

Question 45

45. Orthophosphoric acid is

Answer

Tetrabasic

Question 46

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

Question 47

47. In which of the following groups, when he is placed, its all properties are satisfied?

Answer

None of these

Answer

With inert gases

Answer

With alkali metals

Answer

With halogens

Question 48

48. Plaster of Paris is used

Answer

As a plaster for walls

Answer

As a drying agent

Answer

In dentistry and surgery

Answer

In metallurgical process

Question 49

49. The acid which has a peroxy linkage is

Answer

Sulphurous acid

Answer

Carlo’s acid

Answer

Dithionic acid

Answer

Pyrosulphuric acid

Question 50

50. White enamel of our teeth is

Answer

Ca₃(PO₄)₂

Question 51

51. The structure of XeF₆

Answer

Tetrahedral

Answer

None of these

Answer

Distorted octahedral

Question 52

52. The element that does not form a monoxide is

Question 53

53. Which element forms an ion with charge +3?

Question 54

54. Polyanion formation is maximum in

Question 55

55. Reactivity of borazole is greter than that of benzene because

Answer

Borazole is polar compound

Answer

Borazole is electron deficient compound

Answer

Borazole is nonpolar compound

Answer

Of localized electrons in it

Question 56

56. Which one of the following properties of alkali metals increases in magnitude as the atomic number rises?

Answer

Electro negativity

Answer

Ionic radius

Answer

First ionization energy

Answer

Melting point

Question 57

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

Answer

Greater hardness of Li

Answer

Small size of lithium atom and Li⁺ ion

Answer

Hydration of Li⁺ ion

Answer

Extremely high electropositivity of Li

Question 58

58. The metal that dissolves in liquid ammonia, giving a dark blue coloured solution is

Question 59

59. A Major constituent of Portland cement (except lime) is

Answer

Iron oxide

Question 60

60. In the periodic table, the element with atomic number 16 will be placed in the group

Question 61

61. Fluorine is a stronger oxidizing agent than chlorine in aqueous solution. This is attributed to many factors except.

Answer

Ionization potential

Answer

Electron affinity

Answer

Heat of hydration

Answer

Heat of dissociation

Question 62

62. What causes nitrogen to be chemically inert?

Answer

High bond energy

Answer

Absence of bond polarity

Answer

Short internuclear distance

Answer

Multiple bond formation in the molecule

Question 63

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

Question 64

64. Bond angle is minimum for

Answer 126

None of these

Answer 127

Strongest vanderwaal’s force

Answer 128

H. bonding

Answer 129

Dipole-dipole forces

Answer 130

Sodium atoms

Answer 131

Sodium hydride

Answer 132

Solvated electrons

Answer 133

Sodium amide

Answer 134

Atomic mass

Answer 135

Isotopic number

Answer 136

Atomic number

Answer 137

Mass number

Answer 138

Atomic size

Answer 139

Atomic number

Answer 140

Atomic size and nuclear charge both

Answer 141

Nuclear charge

Answer 142

Hydrogenation

Answer 143

Chlorination

Answer 144

None of these

Answer 145

None of these

Answer 146

Sp²-hybridisation

Answer 147

Sp-hybridisation

Answer 148

Sp³- hybridization

Answer 149

Sp³d²-hybridisation

Answer 150

HCl is formed in moist air

Answer 151

It is covalent

Answer 152

It is very volatile

Answer 153

It is highly hygroscopic

Answer 154

d-orbitals

Answer 155

s-orbitals

Answer 156

p-orbitals

Answer 157

Sodiums sulphates

Answer 158

Sodium thiosulphate

Answer 159

Sodium sulphides

Answer 160

Sodium persulphate

Answer 161

9, 17, 35, 53

Answer 162

12, 20, 56, 88

Answer 163

1, 12, 30, 4, 62

Answer 164

37, 19, 3, 55

Answer 165

Fluorine is highly reactive

Answer 166

HF molecules form intermolecular H-bonds

Answer 167

Fluorine atom is smaller in size

Answer 168

HF is the weakest acid

Answer 169

Diamagnetic nature

Answer 170

None of these of M²⁺ ions

Answer 171

High energies of hydration of M²⁺ in solution

Answer 172

High lattice energy of M²⁺ ions in the solid state

Answer 173

ns₂, nP₅

Answer 174

NS₂, nP₄

Answer 175

nS₂, nP₆

Answer 176

nS₂, nP₃

Answer 177

Melting and boiling points of alkali metals decrease down the group

Answer 178

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

Answer 179

Ionic character of alkali metal halides decreases down the group

Answer 180

Sodium is the most abundant metallic element in sea water

Answer 181

Low electron affinity

Answer 182

Low ionization potential

Answer 183

Large size

Answer 184

High ionization potential

Answer 185

Nitride ion

Answer 186

Fluoride ion

Answer 187

Sodium ion

Answer 188

Chloride ion

Answer 189

Both a and b

Answer 190

The hydration energy of Na₂SO₄ is more than its lattice energy

Answer 191

The lattice energy of BaSO₄ is more than its hydration energy

Answer 192

The lattice energy has no role to play in solubility

Answer 193

Cage compound

Answer 194

Liquid crystal

Answer 195

Solid solution

Answer 196

It cannot act as a bleaching agent

Answer 197

It oxidizes lead sulphides

Answer 198

It oxidizes mercury

Answer 199

It oxidizes potassium iodide

Answer 200

Oxidizing agent

Answer 201

Reducing agent

Answer 202

All the three

Answer 203

Flint glass

Answer 204

Crooke’s glass

Answer 205

Soda glass

Answer 206

Borosilicate glass

Answer 207

Monoclinic sulphur

Answer 208

Plastic sulphur

Answer 209

Rhombic sulphur

Answer 210

Prismatic sulphur

Answer 211

None of these

Answer 212

H₂B₄O₇

Answer 213

None of these

Answer 214

Sulphuric acid

Answer 215

Marshall’s acid

Answer 216

Carlo’s acid

Answer 217

Heavy metals

Answer 218

Noble gases

Answer 219

Light metals

Answer 220

Tetrahedral, acidic

Answer 221

Angular, disc

Answer 222

Linear, basic

Answer 223

Linear acidic

Answer 224

Lattice energy solids

Answer 225

Entropy of solution formation

Answer 226

Hydration energies of cations

Answer 227

Inter – ionic attraction

Answer 228

Al₂(OH)₄

Answer 229

Na₂Al(OH)₄

Answer 230

Na₃AlO₃

Answer 231

Absorbs moisture and turn into liquid

Answer 232

Absorbs moisture and remain solid

Answer 233

Increases the water of crystallization

Answer 234

Loses water of crystallization

Answer 235

Chlorine gas over hot HgO

Answer 236

Perchloric acid (CHIO₄) over hot silver oxide

Answer 237

Hydrogen chloride over phosphorus pentoxide

Answer 238

Chlorine and oxygen over hot silver chlorate

Answer 239

In form of foil for wrapping

Answer 240

As an abrasive in the form of abundum

Answer 241

For preparing artificial

Answer 242

As an oxidizer in metallurgy

Answer 243

Oxygen family

Answer 244

Nitrogen family

Answer 245

Alkali metals

Answer 246

Acidic nature

Answer 247

Covalent nature

Answer 248

Ionization property

Answer 249

Electron deficiency

Answer 250

Cannot be predicted

Answer 251

Ionic and gas

Answer 252

Ionic and liquid

Answer 253

Covalent and liquid

Answer 254

None of these

Answer 255

Nuclear neutron-proton number rations

Answer 256

Atomic numbers

Answer 257

Nuclear masses

Answer 258

Atomic masses

Answer 259

Sulphur tetrachloride

Answer 260

Thionyl chloride

Answer 261

Sulphur monochloride

Answer 262

Sulphuryl chloride

Answer 263

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

Answer 264

Elemental Na is a strong oxidizing agent

Answer 265

Elemental Na is insoluble in NH₃

Answer 266

Elemental Na is easily oxidized

Answer 267

U₂>Br₂>I₂>F₂

Answer 268

I₂>F₂>Br₂>U₂

Answer 269

F₂>Cl₂>Br₂>I2

Answer 270

I₂>Br₂>U₂>F₂

Answer 271

It reacts with fats to form soap

Answer 272

It corrodes the organic tissues

Answer 273

It reacts with chlorine gas

Answer 274

It is used in soda water

Answer 275

Atomic number increases

Answer 276

Effective nuclear charge increases

Answer 277

Additive electrons are accommodated in new electron level

Answer 278

Atomic mass increases

Answer 279

Both oxidized and reduced

Answer 280

It is more reactive than other halogens

Answer 281

It has highest electronegativity

Answer 282

It has highest first ionization energy

Answer 283

It restricts to oxidation state – 1 only

Answer 284

Reduction of calcium chloride with carbon

Answer 285

Electrolysis of solution of calcium chloride in water

Answer 286

Roasting lime stone

Answer 287

Electrolysis of molten anhydrous or fused calcium chloride

Answer 288

Boiling point

Answer 289

Ionization energy

Answer 290

Atomic radius

Answer 291

Boiling point

Answer 292

Atomic radius

Answer 293

Ionization energy

Answer 294

It cannot form a trimer

Answer 295

Al has high ionization energy

Answer 296

Higher co-ordination can be achieved by Al

Answer 297

Al belongs to third group

Answer 298

Preventing overdeveloping and fogging

Answer 299

Reducing solubility of AgBr

Answer 300

Dissolving out unreacted silver bromide

Answer 301

Converting silver halides to metallic silver

Answer 302

Potassium only

Answer 303

Potassium and magnesium

Answer 304

Magnesium only

Answer 305

Magnesium and chlorine

Answer 306

Decrease in I.P

Answer 307

Increase in atomic size of elements

Answer 308

Decrease in electronegativity of the elements

Answer 309

All of these

Answer 310

Weak van der Waals forces between atoms

Answer 311

High polarisability

Answer 312

Gaseous nature

Answer 313

Epsom salt

Answer 314

Plaster of Paris

Answer 315

Hypo phosphorous acid

Answer 316

Pyro phosphoric acid

Answer 317

Orthophosphoric acid

Answer 318

Metaphosphoric acid

Answer 319

It is more reactive than other halogens

Answer 320

It has highest E.N

Answer 321

It has highest first I.E

Answer 322

It restricts to oxidation state – 1 only

Answer 323

Some nitrogen molecules analogous to O₂

Answer 324

Greater amount of nitrogen molecules derived from N¹⁵ isotope

Answer 325

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

Answer 326

‘Li’ is not effected by air

Answer 327

‘Li’ combine with nitrogen directly to form Lithium nitride

Answer 328

‘Li’ has a great tendency to form hydrates

Answer 329

Diamagnetic

Answer 330

Paramagnetic

Answer 331

Ferromagnetic

Answer 332

Antiferromagnetic

Answer 333

Keep away the sharks

Answer 334

To prevent the action of water and salt

Answer 335

Mark the ship lighter

Answer 336

Prevent puncturing by under sea rock

Answer 337

Haemoglobin

Answer 338

Chlorophyll

Answer 339

Calcium oxide

Answer 340

Hypochlorous acid

Answer 341

Weak reducing agents

Answer 342

Strong reducing agents

Answer 343

Weak oxidizing agents

Answer 344

Strong oxidizing agents

Answer 345

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

Answer 346

Nitrogen is much less soluble in blood than helium

Answer 347

Helium is much less soluble in blood than nitrogen

Answer 348

Nitrogen is highly soluble in water

Answer 349

Equal to O and Se

Answer 350

More than O and Se

Answer 351

More than O but less than Se

Answer 352

Less than O but more than SE

Answer 353

Less soluble in water

Answer 354

Insoluble in water

Answer 355

Variable trend

Answer 356

Highly soluble in water

Answer 357

CaSO₄.2H₂O

Answer 358

CaSO₄. 1/2H₂O

Answer 359

CaSO₄. 3H₂O

Answer 360

Reducing agents

Answer 361

Oxidizing agents

Answer 362

Drying agents

Answer 363

Oxidizing as well as reducing agents

Answer 364

Gypsum contains a lower percentage of calcium than plaster of pairs

Answer 365

Plaster of Pairs can be obtained by partial oxidation of gypsum

Answer 366

Gypsum is obtained by heating plaster of pairs

Answer 367

Plaster of Paris is obtained by partial oxidation of gypsum

Answer 368

High covalent nature

Answer 369

Small ionic size of Li⁺

Answer 370

Low ∆H lattice

Answer 371

High ∆H lattice

Answer 372

-2, +2, +6

Answer 373

+2, +4, +6

Answer 374

Cl₂ > Br₂ > I₂ > F₂

Answer 375

F₂ > Cl₂ > Br₂ > I₂

Answer 376

Br₂ > Cl₂ > F₂ > I₂

Answer 377

I₂ > Br₂ > Cl₂ > F₂

Answer 378

Inner transition elements

Answer 379

Transition elements

Answer 380

Representative elements

Answer 381

Oxyborates

Answer 382

Electrolytic methods

Answer 383

Double decomposition methods

Answer 384

Displacement methods

Answer 385

Reduction methods

Answer 386

Variation is not regular

Answer 387

Increases down the group

Answer 388

Remains unchanged

Answer 389

Decreases down the group

Answer 390

Low electronegativity

Answer 391

Low charge density

Answer 392

Lower electro positivity

Answer 393

O₂ and He

Answer 394

O₂ and Ar

Answer 395

O₂ and CO₂

Answer 396

CO₂ and Ar

Answer 397

None of these

Answer 398

CaO has high m.p.

Answer 399

Kl has high m.p.

Answer 400

Lattice energy of CaO is much higher than that of Kl

Answer 401

Kl is soluble in benzene

Answer 402

Ca and CO₂

Answer 403

It decomposes the acid

Answer 404

Acid forms hydrates with water

Answer 405

Acid decomposes water

Answer 406

It hydrolyses the acid

Answer 407

The reaction does not go to completion

Answer 408

SO₃ is insoluble in H₂O

Answer 409

The reaction is highly exothermic

Answer 410

The reaction is quite slow

Answer 411

Strong acid and strong base

Answer 412

Strong acid and weak base

Answer 413

Weak acid and weak base

Answer 414

Weak acid and strong base

Answer 415

In the most readily available gas

Answer 416

Has the lowest ionization enthalpy

Answer 417

Has the highest heat of vaporization

Answer 418

Has the largest size

Answer 419

Noble gases will all burn in pure oxygen

Answer 420

Noble gases are all dense gases

Answer 421

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

Answer 422

None of these

Answer 423

Alkali metals have ns’ configuring in outermost shells

Answer 424

Alkali metals do not reacts with metals

Answer 425

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

Answer 426

Alkali metal atom has the smallest size in its period

Answer 427

Iodine solution

Answer 428

Sea shells

Answer 429

A marble states

Answer 430

Calcried gypsum

Answer 431

Monoatomic

Answer 432

All of these

Answer 433

Polyatomic

Answer 434

Mixture of neon and oxygen

Answer 435

Mixture of xenon and nitrogen

Answer 436

Mixture of argon and oxygen

Answer 437

Mixture of helium and oxygen

Answer 438

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

Answer 439

Form salt like hydrides

Answer 440

Show increasing electro negativity from Li to Cs.

Answer 441

Form salts which are predominantly covalent

Answer 442

Small ionic size

Answer 443

Strongly bond valence electrons

Answer 444

Large atomic size

Answer 445

Metallic properties

Answer 446

Single free atoms

Answer 447

Diatomic molecules

Answer 448

Triatomic molecules

Answer 449

Atoms linked by weak bonds

Answer 450

Of easy extraction of Al from it

Answer 451

Bauxite contains maximum of Al

Answer 452

Bauxite is available in large quantity

Answer 453

Bauxite is less impure

Answer 454

Metalloids

Answer 455

Non-metals

Answer 456

Polymorphic

Answer 457

Radioactive

Answer 458

Phosphorus from phosphorite

Answer 459

Iron from haematite

Answer 460

Solvay process of sodium carbonate

Answer 461

Ordinary (soda lime) glass

Answer 462

HE is used in producing very low temperatures

Answer 463

Ne is obtained during radioactive disintegration

Answer 464

Ar is used in electric bulbs

Answer 465

Half-life of Rn is only 3-8 days

Answer 466

It changes into calcium chloride and calcium chlorate

Answer 467

It change into calcium hypochlorate

Answer 468

It absorbs moisture

Answer 469

It changes into CaCl₂ and Ca(OH)₂

Answer 470

Sodium amide

Answer 471

Sodium hydride

Answer 472

Sodium atoms

Answer 473

Solvated electrons

Answer 474

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

Answer 475

None of these

Answer 476

There is no change in the nuclear charge

Answer 477

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

Answer 478

Proton and silicon

Answer 479

Gallium and Germanium

Answer 480

Aluminum and silicon

Answer 481

Iron and sulphur

Answer 482

Chromyl chloride

Answer 483

Chromous chloride

Answer 484

Chromic chloride

Answer 485

Common salt

Answer 486

Carnallite

Answer 487

Tetra calcium aluminoferrite

Answer 488

Diclacium silicate

Answer 489

Tri-calcium aluminate

Answer 490

Tri-calcium silicate

Answer 491

A carbonate

Answer 492

A sulphate

Answer 493

Li₂CO₃ is soluble in water

Answer 494

Carbonates of Na, K, NH₄ are soluble in water

Answer 495

Basic carbonates of Mg and Cu are soluble in water

Answer 496

Carbonates of Ca, Ba, Sr are soluble in water

Answer 497

Both have similar electronic configurations

Answer 498

Both have nearly the same size

Answer 499

The ratio of their charge to size is nearly the same

Answer 500

Both are found together in nature

Answer 501

Higher I-P

Answer 502

Zero electron affinity

Answer 503

Large size

Answer 504

Lose 2 electrons

Answer 505

Gain 2 electrons

Answer 506

Lose 3 electrons

Answer 507

Gain 3 electrons

Answer 508

Keeping it cool

Answer 509

Converting sand into silici acid

Answer 510

Hydrating sand and gravel mixed with cement

Answer 511

Developing interlocking needle like crystals of hydrated silicates

Answer 512

Anhydrous calcium chloride

Answer 513

Na₃PO₄

Answer 514

Active charcoal

Answer 515

Phosphorus pentoxidse

Answer 516

Ozone is diamagnetic whereas dioxygen is paramagnetic

Answer 517

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

Answer 518

Ozone is more reactive than dioxygen

Answer 519

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

Answer 520

White phosphorus

Answer 521

Red phosphorus

Answer 522

Scarlet phosphorus

Answer 523

Violet phosphorus

Answer 524

Tetrahedral

Answer 525

Br is more reactive than Cl₂

Answer 526

Cl₂ is more insoluble in water

Answer 527

None of these

Answer 528

Iodine is a solid

Answer 529

Colourless

Answer 530

Bluish green

Answer 531

Radish brown

Answer 532

All are non-metals

Answer 533

They have high electron affinity and ionization energy

Answer 534

All the halogens have electronic configuration ns2P5

Answer 535

All the halogens react with noble gases to form their halides

Answer 536

Expense, but a very uncreative gas

Answer 537

Expensive but easy to store in cylinder

Answer 538

Lighter than air and cheap to produce

Answer 539

Less dense then air and not flammable

Answer 540

None of these

Answer 541

Noble gases have o heat of vapourization

Answer 542

It increases gradually down the group

Answer 543

It decreases gradually down the group

Answer 544

Dissolving heavy salt in water

Answer 545

Removing impurities of calcium and magnesium form water

Answer 546

Simple distillation of water

Answer 547

Prolonged electrolysis of water

Answer 548

Three layers are maintained at different temperatures

Answer 549

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

Answer 550

Three layers have different densities

Answer 551

There is special arrangement is cell to keep the layers separate

Answer 552

To increase Al production

Answer 553

To act as reducing agent

Answer 554

To make a conducting solution of bauxite

Answer 555

To protect the anodes

Answer 556

Small size

Answer 557

Low first ionization energy

Answer 558

High dissociation energy

Answer 559

Sodium nitride

Answer 560

Sodium hydride

Answer 561

Sodium azide

Answer 562

Sodium amide

Answer 563

Fluorine does not form oxoacid

Answer 564

Fluorine cannot be prepared by electrolysis of fused metal fluorides

Answer 565

Bond energy of fluorine is less than that of chlorine

Answer 566

Electron affinity of chlorine is greater than that of fluorine

Answer 567

Nitrogen trichloride

Answer 568

Hyponitrous acid

Answer 569

Nitrosyl chloride

Answer 570

Phosphorus trichloride

Answer 571

Decease in resistance with intensity of light

Answer 572

Decrease in resistance with increase in temperature

Answer 573

Different resistance under different circumstance

Answer 574

Increase in resistance with increase in temperature

Answer 575

Hypo phosphorous acid

Answer 576

Phosphorous acid

Answer 577

Hypo phosphoric acid

Answer 578

Orthophosphoric acid

Answer 579

Sulphur is present in the mixture as impurity

Answer 580

Of the oxidation of H₂S gas by some acid radicals

Answer 581

III group radicals are precipitated as hydroxides

Answer 582

IV group radicals are precipitated as sulphides

Answer 583

Hydration energy

Answer 584

High atomic number

Answer 585

Electron affinity

Answer 586

Energy dissociation

Answer 587

More electron repulsion in fluorine

Answer 588

Small size of fluorine

Answer 589

Non-metallic nature of fluorine

Answer 590

More electro negativity of fluorine

Answer 591

It has metallic bond

Answer 592

Its molecule has a large size

Answer 593

It is highly electronegative

Answer 594

It possess hydrogen bonding

Answer 595

Nitric oxide

Answer 596

Nitrogen dioxide

Answer 597

Nitrous oxide

Answer 598

Dinitrogen tetraoxide

Answer 599

The fixation of picture

Answer 600

The colour of picture

Answer 601

Picture printed

Answer 602

Developing picture

Answer 603

There is a regular gradation of properties from top to bottom

Answer 604

Marked change of properties

Answer 605

Whole group consist of non-metals

Answer 606

Abrupt change of properties

Answer 607

Coordinate

Answer 608

Their ionization potential is less than that of other elements

Answer 609

They contain only one electron in their outermost shell

Answer 610

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

Answer 611

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

Answer 612

Diatomic molecules

Answer 613

Cannot be predicted

Answer 614

Various forms

Answer 615

Monoatomic molecules

Answer 616

J.J Thomson

Answer 617

Frank land

Answer 618

Magnesium ammonium phosphate

Answer 619

Ferrous ammonium sulphate

Answer 620

Magnesium sulphates

Answer 621

Calcium sulphates

Answer 622

Electron affinity

Answer 623

Ionization energy

Answer 624

Lattice energy

Answer 625

Hydration energy

Answer 626

Calcium carbonate

Answer 627

Sodium carbonate

Answer 628

Calcium oxide

Answer 629

Sodium bicarbonate

Answer 630

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

Answer 631

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

Answer 632

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

Answer 633

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

Answer 634

Leads to the dissolution of beryllium metal

Answer 635

Precipitate Mg

Answer 636

Have no effect

Answer 637

Precipitate Mg metal

Answer 638

Phosphorus

Answer 639

Sodium borosilicate and aluminum borosilicate

Answer 640

Sodium silicate and lead silicate

Answer 641

Sodium silicate and aluminum borosilicate

Answer 642

Sodium silicate and calcium silicate

Answer 643

It forms R₂O₃

Answer 644

It is a gas at room temperature

Answer 645

It has oxidation state of +4

Answer 646

It forms RX₂

Answer 647

Smaller ionic radii

Answer 648

Greater hardness

Answer 649

Highest boiling points

Answer 650

Lower ionization energies

Answer 651

Glass printing

Answer 652

Paper printing

Answer 653

Cloth printing

Answer 654

Leather printing

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

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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