Environmental Chemistry Online Mcqs Test

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Question 1

1. Carbon monoxide is pollutant as it

Answer

Inactivates nerves

Answer

Inhibits glycolysis

Answer

Combines with oxygen

Answer

Combines with hemoglobin

Question 2

2. Most hazardous metal pollutant of automobile exhaust is:

Question 3

3. Which substance is not used are additive in paper making?

Question 4

4. Chromium (VI is used in)

Answer

Cement industry

Answer

Leather tanning

Answer

Fertilizer industry

Answer

Water purification

Question 5

5. Two vitamins absorbed from intestine along with fats are

Question 6

6. Air, water, soil etc are the examples of _________ resources.

Answer

Non-renewable

Question 7

7. Spraying of DDT produces pollution of

Answer

Air and water

Answer

Air and soil

Answer

Air, water and soil

Question 8

8. The combination of smoke and fog is called

Answer

Primary pollutant

Answer

Secondary pollutant

Answer

Coagulation

Question 9

9. What is the effect of polluted air on environment?

Answer

Global warming

Question 10

10. Denaturing of protein is:

Answer

Unfolding of protein

Answer

Developing hydrogen bonding in peptide chain

Answer

Hydrolysis of protein

Answer

Three dimensional twisting and folding of peptide chain

Question 11

11. A single chlorine free radical can destroy how many ozone molecules

Question 12

12. A condensation polymer among the following is

Answer

Polystyrene

Question 13

13. Some O₂ is present in water. The water will be considered as “polluted water” when concentration of O₂ in it will be

Answer

Less than 4 ppm

Answer

Greater than 8 ppm

Answer

Greater than 4 ppm

Answer

4 – 8 ppm

Question 14

14. BOD is

Answer

Biosphere oxygen demand

Answer

Biological oxygen deficit

Answer

None of these

Answer

Biological oxygen demand

Question 15

15. Which of the following forms a toxic substance in blood by combining with hemoglobin?

Answer

Carbon dioxide

Answer

Carbon monoxide

Question 16

16. Which structure of protein gives the sequence of amino acids only?

Answer

Secondary structure

Answer

Primary structure

Answer

Quaternary structure

Answer

Tertiary structure

Question 17

17. Which causes water pollution?

Answer

Smoke/fly ash

Answer

Automobile exhausts

Answer

2, 4-D and pesticides

Question 18

18. Biochemical oxygen demand(BOD) is the capacity of organic matter is natural water to consumer oxygen with in a period of

Question 19

19. Fluoride pollution mainly affects:

Question 20

20. Newspaper can be recycled again and again how many times?

Question 21

21. In fructose the possible optical isomers are

Question 22

22. The prosthetic group is glycoprotein is

Answer

Nucleic acid

Answer

Carbohydrate

Question 23

23. Soil salinity can be measured by

Answer

Calorimeter

Answer

Conductivity meter

Question 24

24. Which one is the major reason for pollution in big cities?

Answer

None of these

Answer

Fossil fuel

Answer

Heat dispersion

Question 25

25. A person is affected with carbon monoxide gas. How can we save him/her by adverse effect of the poisonous gas?

Answer

Drink dilute solution of CH₃COOH

Answer

All are correct

Answer

Supply pure O₂ for breathing

Answer

Drink dilute solution of NaHCO₃

Question 26

26. The metal present in blood is

Question 27

27. Which one of the following is not a polymer?

Question 28

28. Colloidal material in the raw water is removed by

Answer

Purification

Answer

Chlorination

Answer

Combustion

Answer

Coagulation

Question 29

29. Drained sewage has B.OD.

Answer

More than that of water

Answer

Equal to that of water

Answer

Less than that of water

Answer

None of these

Question 30

30. The molecular formula of a trisaccharide will be

Answer

C₃H₃O₃

Answer

C₃H₆O₃

Answer

C₁₈H₃₂O₁₆

Answer

C₁₈H₃₆O₁₈

Question 31

31. Which of the following is an air pollutant?

Answer

Carbon monoxide

Answer

Carbon dioxide

Question 32

32. Swage water is purified by

Answer

Microorganisms

Answer

Aquatic plants

Question 33

33. Atmosphere of big/metropolitan cities is polluted most by

Answer

Radio-active fall out

Answer

Household waste

Answer

Automobile exhausts

Answer

Pesticide residue

Question 34

34. Which of the following devices is suitable for the removal of gaseous pollutants?

Answer

Cyclone separator

Answer

Fabric filter

Answer

Wet scrubber

Answer

Electrostatic precipitator

Question 35

35. In sewage treatment, the detention period allowed for oxidation ponds ranges from ___________ weeks.

Question 36

36. Which of the following is a non-point source of water pollution?

Answer

Urban and suburban lands

Answer

Sewage treatment plants

Answer

All of these

Question 37

37. Violet colour is obtained when dilute CuSO₄ is added in alkaline solution of protein. This test is known as

Answer

All of these

Answer

Xanthoproteic test

Answer

Hopkins-cole

Question 38

38. Sulphure dioxide affects

Answer

All membrane systems

Answer

Plasmodesmata

Question 39

39. Ozone layer of stratosphere requires protection from indiscriminate use of

Answer

Balloons and turbo-prop airplanes

Answer

Atomic explosions and industrial wastes

Answer

Fungicides, insecticides, bactericides and

Answer

Aerosols and high flying jets

Question 40

40. An example of water soluble vitamin is

Question 41

41. Which of the following is not an air pollutant?

Question 42

42. Eutrophication causes reduction in

Answer

Dissolved hydrogen

Answer

All of these

Answer

Dissolved salts

Answer

Dissolved oxygen

Question 43

43. Domestic waste mostly constitutes

Answer

Air pollution

Answer

Non-biodegradable pollution

Answer

Biodegradable pollution

Question 44

44. Choose a point which is not included in the components of environment

Answer

Stratosphere

Answer

Hydrosphere

Answer

Lithosphere

Question 45

45. Chemical oxygen demand of water (COD) is measure by reacting water with

Answer

Permanganate ion (MnO₄)

Answer

Chromate ion (CrO₄²¯)

Answer

Dichromate ion (Cr₂O₇²¯)

Answer

Sulphate ion (SO₄²¯)

Question 46

46. Carbon monoxide is harmful to human beings as it

Answer

Is antagonistic to CO₂

Answer

Is destructive to O₃

Answer

Has higher affinity for hemoglobin as compared to oxygen

Answer

Is carcinogenic

Question 47

47. Ozone depletion in stratosphere shall result in

Answer

Global warming

Answer

Forest fires

Answer

Increased incidence of skin cancer

Answer

None of these

Question 48

48. Smog is:

Answer

All of these

Answer

Is colourless

Answer

A natural phenomenon

Answer

A combination of smoke and fog

Question 49

49. Which substances do not react immediately with bromine water?

Question 50

50. Water is often treated with chlorine to

Answer

Kill germs

Answer

Increase oxygen content

Answer

Remove hardness

Answer

Remove suspended particles

Question 51

51. The temperature in the incineration of industrial and hazardons water process had a range

Answer

900 to 1000°C

Answer

950 to 1300+C

Answer

250 to 500°C

Answer

500 to 900°C

Question 52

52. Pollutant of automobile exhausts that affects nervous system/produces mental diseases is

Answer

Nitrogen oxide

Answer

Sulphur oxide

Question 53

53. The pH range of the acid rain is

Answer

Less than 5.6

Question 54

54. Lithosphere has amount of silicon

Question 55

55. The yellowish colour in photochemical smog is due to the presence of

Question 56

56. Ozone hole is maximum over

Answer

Antarctica

Question 57

57. Presence of volatile compounds like gasoline, oil, alcohol, ether etc. in municipal sewers may cause

Answer

Undesirable plant growth

Answer

Non-biodegradable foam

Question 58

58. Minamata disease is due to pollution of

Answer

Industrial waste containing mercury into fishing water

Answer

Organic waste into drinking water

Answer

Oil spill in water

Answer

Arsenic into the atmosphere

Question 59

59. Which one of the pollutants of automobile exhausts affects the nervous system or produces mental diseases?

Question 60

60. In the glass manufacturing process, annealing is done to prevent glass from

Answer

Becoming dirty

Answer

Harmful stress

Answer

Increased shinning

Question 61

61. Which one of the following macromolecules contains carbon, hydrogen, nitrogen and oxygen in it?

Question 62

62. Mottling of teeth is due to presence of an element in drinking water

Question 63

63. What do you see as the main problem of Pakistan?

Answer

Growing population

Answer

Clean drinking water

Answer

Unemployment

Answer

Shortage of food

Question 64

64. Which one of the following is not an example of chain growth polymer?

Answer 137

Chloramines

Answer 138

Neutrality

Answer 139

Buffer action

Answer 140

Preventing reaction between oxygen and hemoglobin

Answer 141

Forming stable compound with hemoglobin

Answer 142

Destruction of hemoglobin

Answer 143

Combining with oxygen to form carbon dioxide

Answer 144

Adipic acid

Answer 145

900 to 1000°C

Answer 146

950 to 1300°C

Answer 147

250 to 500°C

Answer 148

500 to 900°C

Answer 149

The C – F bond is stronger than the C – Cl bond

Answer 150

The C – F bond is stronger than C – Cl bond

Answer 151

Fluorine is more electronegative than chlorine

Answer 152

The chlorine atom is larger than the fluorine atom

Answer 153

Equal to 1

Answer 154

Less than 1

Answer 155

None of these

Answer 156

More than 1

Answer 157

Global warming

Answer 158

UV rays reach the earth

Answer 159

Greenhouse effect

Answer 160

Depletion in total amount of O₃ in particular region

Answer 161

Decomposition of O₂ to O₃ in sunlight

Answer 162

Increase of concentration of O₃ in tropical region

Answer 163

Formation of a complex of O₃ with hydrocarbons

Answer 164

Agro-industry

Answer 165

Thermal power plant

Answer 166

All the above

Answer 167

Plastic toys

Answer 168

None of these

Answer 169

Epoxy resin

Answer 170

Wet and dry environment

Answer 171

Eating of seasonal vegetables

Answer 172

Inhalation of seasonal pollen

Answer 173

Low temperature

Answer 174

Vegetable fiber

Answer 175

Mineral fiber

Answer 176

Animal fiber

Answer 177

None of these

Answer 178

Coagulation

Answer 179

Chlorination

Answer 180

Self-oxidation reduction

Answer 181

Atmosphere

Answer 182

Lithosphere

Answer 183

Hydrosphere

Answer 184

Industries

Answer 185

Hydroelectric power

Answer 186

Pollen grains

Answer 187

Automobiles

Answer 188

Carbon dioxide

Answer 189

Carbon monoxide

Answer 190

Sulphur dioxide

Answer 191

Oil spills in H₂O

Answer 192

Industrial waste Having Hg

Answer 193

Arsenic (As) into atmosphere

Answer 194

Organic waste in drinking H₂O

Answer 195

SO₃ and CO

Answer 196

Ozone and dust

Answer 197

SO₂ and NO₂

Answer 198

CO₂ and CO

Answer 199

Change in taste and odour

Answer 200

Blue baby syndrome

Answer 201

Intestinal irritation

Answer 202

Sodium (I)

Answer 203

Chromium (VI)

Answer 204

Calcium (II)

Answer 205

Chromium (III)

Answer 206

The concentric atmosphere layer just above troposphere is called stratosphere, which is rich in ozone.

Answer 207

Troposhere is a dusty zone containing water vapor and clouds.

Answer 208

The radio waves used in the long distance radio communication are reflected back to earth by stratosphere.

Answer 209

Mesosphere is characterized by very low atmospheric pressure and low temperature.

Answer 210

Corn straw

Answer 211

Eucalyptus

Answer 212

Kill plants

Answer 213

Control the growth of fungus

Answer 214

Kill herbs

Answer 215

Kill insects

Answer 216

Carbon dioxide

Answer 217

Carbon dioxide

Answer 218

Nitrogen oxides and chloro fluorocarbon

Answer 219

Sulphure dioxide

Answer 220

500 to 900°C

Answer 221

950 to 1300°C

Answer 222

900 to 100°C

Answer 223

250 to 500°C

Answer 224

An aerobic suspended growth biological treatment system

Answer 225

An anaerobic attached growth biological treatment system

Answer 226

An anaerobic suspended growth treatment system

Answer 227

An aerobic attached growth treatment system

Answer 228

Mesosphere

Answer 229

Trophosphere

Answer 230

Thermosphere

Answer 231

Stratosphere

Answer 232

Sewage treatment plant

Answer 233

Thermal power plant

Answer 234

Solid waste disposal sites

Answer 235

All of the above

Answer 236

Assimilated in the root hairs of plants

Answer 237

Less toxic

Answer 238

Easy to spread in the field

Answer 239

More soluble as compared to smaller crystals

Answer 240

Na₂SO₃

Answer 241

Sulphure dioxide

Answer 242

Nitrogen oxide

Answer 243

Nitric oxide

Answer 244

Nitrous oxide

Answer 245

Non renewable

Answer 246

Paper is wounded in the form of reel

Answer 247

Paper thickness in reduced

Answer 248

Moisture is removed

Answer 249

Pulp is spread over fabric or screen

Answer 250

It reduces the thickness of paper

Answer 251

It discharge the pulp at the screen of Fourdriner table

Answer 252

Web structure is consolidated

Answer 253

It dry the paper

Answer 254

Chromium V

Answer 255

Chromium VI

Answer 256

Chromium IV

Answer 257

Chromium III

Answer 258

Ionosphere

Answer 259

Troposphere

Answer 260

None of these

Answer 261

Stratosphere

Answer 262

Air pollution

Answer 263

Radioactive pollution

Answer 264

Water pollution

Answer 265

Noise pollution

Answer 266

Non-renewable

Answer 267

pH of water is controlled

Answer 268

Hardness of water decreases

Answer 269

Dissolved oxygen increases

Answer 270

Cl₂ kills the pathogenic bacteria

Answer 271

CO pollution

Answer 272

Ozone depletion

Answer 273

CO₂ Pollution

Answer 274

Calendar stock, Drying, pressing, flow spreader

Answer 275

Calendar stock, flow spreader, pressing drying

Answer 276

Flow spreader, Drying, pressing, calendar stock

Answer 277

Flow spreader, pressing, drying, calendar stock

Answer 278

Buffer action

Answer 279

Neutrality

Answer 280

Peroxy acetyl nitrate

Answer 281

SO₂ and SO₃

Answer 282

Chlorine nitrate

Answer 283

Increases nitrogen contents of soil

Answer 284

Increases sulphur contents of soil

Answer 285

Increases oxygen contents of soil

Answer 286

Acts pesticide

Answer 287

Chemical composition

Answer 288

Physical properties

Answer 289

All of these

Answer 290

Manufacturing process

Answer 291

Troposphere

Answer 292

Thermosphere

Answer 293

Mesosphere

Answer 294

Stratosphere

Answer 295

Fullerenes

Answer 296

Polyhalogens

Answer 297

Slightly higher than that when the thunderstorm is not there

Answer 298

Which depends on the amount of dust in air

Answer 299

Uninfluenced by occurrence of thunderstorm

Answer 300

Slightly lower than that of rain water without thunderstorm

Answer 301

Sugar cane

Answer 302

Paddy rice

Answer 303

Trace elements

Answer 304

Nutrient elements

Answer 305

Basic elements

Answer 306

Terpolymer

Answer 307

Heteropolymer

Answer 308

Homopolymer

Answer 309

Both can be found in living things

Answer 310

Both are polysaccharides

Answer 311

Cellulose is greater in amount on earth as compared to starch

Answer 312

Both are formed by same type of monomers

Answer 313

Sulphure dioxide

Answer 314

Nitrogen peroxide

Answer 315

To help plant to undergo photosynthesis

Answer 316

To destroy nitrogen oxide from the atmosphere

Answer 317

To help to clean the atmosphere

Answer 318

To help in fixing of bacteria

Answer 319

Livestock waste

Answer 320

Oil leaks and spills

Answer 321

Disposal of industrial effluents

Answer 322

Caron dioxide

Answer 323

Chloroform

Answer 324

Household waste

Answer 325

Automobile exhausts

Answer 326

Pesticide residue

Answer 327

Radioactive fall out

Answer 328

Polystyrene

Answer 329

Polyurethane

Answer 330

Hydrocarbons

Answer 331

Carbohydrates

Answer 332

Noise pollution

Answer 333

Air pollution

Answer 334

Radioactive pollution

Answer 335

Water pollution

Answer 336

N₂O and burnt hydrocarbons

Answer 337

Nitrons oxide and unburnt hydrocarbons

Answer 338

Nilric oxide and unburnt hydrocarbons

Answer 339

NO and burnt hydrocarbons

Answer 340

Polyester fiber

Answer 341

Epiphytic lichens

Answer 342

Liver worts

Answer 343

Home worts

Answer 344

One – CHO group

Answer 345

One primary alcoholic group

Answer 346

Four secondary alcoholic group

Answer 347

All are correct

Answer 348

Keeping pH 7.35

Answer 349

Oxidizing agent

Answer 350

Heat protein

Answer 351

pH changes

Answer 352

Oxides of nitrogen

Answer 353

Oxides of sulphur

Answer 354

Oxides of carbon

Answer 355

None of these

Answer 356

Increase concentration of ozone

Answer 357

Reduction of thickness of ozone in troposphere

Answer 358

Reduction in thickness of ozone layer in stratosphere

Answer 359

Hole in ozone layers

Answer 360

Sewage and agricultural fertilizers

Answer 361

Agricultural fertilizers

Answer 362

Phosphate rocks and sewage

Answer 363

Weathering of phosphate rocks only

Answer 364

Skin cancer

Answer 365

Mouth cancer

Answer 366

Liver cancer

Answer 367

Lung cancer

Answer 368

Biochemical oxygen demand

Answer 369

Usually less than COD

Answer 370

A measure of the organic matter presents in water

Answer 371

All of these

Answer 372

Buffer action

Answer 373

Neutrality

Answer 374

Alkalinity

Answer 375

Polyethene

Answer 376

Polyvinyl chloride

Answer 377

Addition of chemical additives

Answer 378

Pulp is dispersed in water and slurry is obtained

Answer 379

Mechanical beating of fibers

Answer 380

Pressed to remove moisture

Answer 381

Hydrocarbons

Answer 382

Sulphur dioxide

Answer 383

Carbon monoxide

Answer 384

Carbon dioxide

Answer 385

Dissolved oxygen

Answer 386

All of these

Answer 387

Haemocyanin

Answer 388

Vitamin B₁₂

Answer 389

Chlorophyll

Answer 390

Carbonic anhydrase

Answer 391

Remains same

Answer 392

Unpredictable

Answer 393

Sulphure dioxide

Answer 394

Carbon monoxide

Answer 395

Highly acidic

Answer 396

Now safe or human consumption

Answer 397

The ground water

Answer 398

The Surface water

Answer 399

Safe for human consumption

Answer 400

Increase of plantation

Answer 401

Industrialization

Answer 402

Rapid growth of population

Answer 403

Urbanization

Answer 404

2ppm – 6ppm

Answer 405

4ppm – 8ppm

Answer 406

2ppm – 3ppm

Answer 407

2ppm – 4ppm

Answer 408

Excess NO₂ and SO₂ from burning fossil fuels

Answer 409

Excess production of NH₃ by industry and coal gas

Answer 410

Excess release of carbon monoxide by incomplete combustion

Answer 411

Excess formation of CO₂ by combustion and animal respiration

Answer 412

Organic matter

Answer 413

Microbes and organic matter

Answer 414

None of these

Answer 415

Copper Sulphate

Answer 416

Nickel Sulphate

Answer 417

Barium Sulphate

Answer 418

Treatment with chlorine

Answer 419

Coagulation

Answer 420

Treatment with Iodine

Answer 421

Sulphure dioxide

Answer 422

Carbon monoxide

Answer 423

Nitrous oxide

Answer 424

Essential oils obtained from plants

Answer 425

Glycerides of saturated fatty acids

Answer 426

Unsaturated fatty acids

Answer 427

Glycerides of unsaturated fatty acids

Answer 428

Conversion of monomer to monomer ions by protons

Answer 429

Coordination reaction between monomers

Answer 430

Condensation reaction between monomers

Answer 431

Hydrolysis of monomers

Answer 432

Carbon dioxide

Answer 433

Carbon monoxide

Answer 434

Chlorofluorocarbons and nitrogen oxides

Answer 435

Sulphur oxide

Answer 436

Excess SO₂

Answer 437

Low temperature

Answer 438

High temperature

Answer 439

Excess NH₃

Answer 440

Riboflavin

Answer 441

Ascorbic acid

Answer 442

Allotropes

Answer 443

Glucose and fructose

Answer 444

Fructose and maltose

Answer 445

Glucose and maltose

Answer 446

Fructose and lactose

Answer 447

It is not easily/rapidly degraded on nature

Answer 448

It is less effective than others

Answer 449

Its high cost

Answer 450

It becomes ineffective after some time

Answer 451

Thermoplastics

Answer 452

Elastomers

Answer 453

Thermosetting polymers

Answer 454

Non-renewable

Answer 455

Chromium (VI)

Answer 456

Chromium (III)

Answer 457

Sulphure dioxide

Answer 458

Carbon dioxide

Answer 459

Industrial discharges

Answer 460

Phthalic acid

Answer 461

Malonic acid

Answer 462

Acetic acid

Answer 463

Maleic acid

Answer 464

Release of toxic/undesirable materials in environment

Answer 465

All the above

Answer 466

Conservation of energy

Answer 467

Removal of top soil

Answer 468

Synthetic polymer

Answer 469

Cross linked or inter connected polymer

Answer 470

Linear polymer

Answer 471

Biotic and abiotic components of environment

Answer 472

Biotic components

Answer 473

Plants only

Answer 474

Chlorofluorocarbon

Answer 475

Photochemical oxidants

Answer 476

Sulphur dioxide

Answer 477

Can sugar field

Answer 478

Cotton field

Answer 479

Paddy field

Answer 480

Wheat field

Answer 481

Burn to produce toxic fumes

Answer 482

Decompose to produce toxic products

Answer 483

Are made from petroleum

Answer 484

Are very inflammable

Answer 485

Flood in Ravi

Answer 486

Air pollutants from Lahore chemical industries

Answer 487

Temperature mediated spoilage of marble

Answer 488

All of these

Answer 489

Both b & c

Answer 490

Acidification of soil

Answer 491

Combustion of soil

Answer 492

Drying of soil

Answer 493

Neutralization of soil

Answer 494

Polyethylene

Answer 495

Formaldehyde

Answer 496

Acetaldehyde

Answer 497

Chlorobenzene

Answer 498

Photochemical smog occurs in day time whereas the classical smog occurs in early morning hours

Answer 499

During formation of smog the level of ozone in the atmosphere goes down

Answer 500

Classical smog has an oxidizing character while the photochemical smog is reducing in character

Answer 501

CO which is major pollutant resulting from the combustion of fuels in automobiles plays a major role in photochemical smog

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Total Marks:	201
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