Environmental Chemistry Online Mcqs Test

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Question 1

1. Carbon monoxide is pollutant as it

Answer

Combines with oxygen

Answer

Combines with hemoglobin

Answer

Inactivates nerves

Answer

Inhibits glycolysis

Question 2

2. Choose the chief air pollutant among the following which depletes ozone layer

Answer

Carbon dioxide

Answer

Chlorofluorocarbons and nitrogen oxides

Answer

Carbon monoxide

Answer

Sulphur oxide

Question 3

3. Biodegradable pollutant is

Question 4

4. Most of the fertilizer are in prilled form because it is

Answer

More soluble as compared to smaller crystals

Answer

Less toxic

Answer

Assimilated in the root hairs of plants

Answer

Easy to spread in the field

Question 5

5. The metal present in blood is

Question 6

6. Shahi Qilla may be destroyed by

Answer

All of these

Answer

Temperature mediated spoilage of marble

Answer

Flood in Ravi

Answer

Air pollutants from Lahore chemical industries

Question 7

7. Pollution is

Answer

Removal of top soil

Answer

Conservation of energy

Answer

All the above

Answer

Release of toxic/undesirable materials in environment

Question 8

8. Glass is classified into different types on the basis of its

Answer

Physical properties

Answer

Chemical composition

Answer

All of these

Answer

Manufacturing process

Question 9

9. Which of the following is a secondary air pollutant?

Answer

Carbon dioxide

Answer

Sulphur dioxide

Answer

Carbon monoxide

Question 10

10. B.O.D. is connected with

Answer

Microbes and organic matter

Answer

None of these

Answer

Organic matter

Question 11

11. Which of the following is an air pollutant?

Answer

Carbon monoxide

Answer

Carbon dioxide

Question 12

12. BOD is

Answer

Biosphere oxygen demand

Answer

Biological oxygen deficit

Answer

None of these

Answer

Biological oxygen demand

Question 13

13. Eutrophication causes reduction in

Answer

Dissolved hydrogen

Answer

Dissolved oxygen

Answer

All of these

Answer

Dissolved salts

Question 14

14. Depletion of ozone layer is due to

Answer

Oxides of carbon

Answer

Oxides of sulphur

Answer

None of these

Answer

Oxides of nitrogen

Question 15

15. The main pollutant of leather tanneries in the waste water is due to the salt of:

Answer

Chromium (III)

Answer

Chromium (VI)

Question 16

16. Two vitamins absorbed from intestine along with fats are

Question 17

17. The temperature in the incineration of industrial and hazardous waste process has a range

Answer

500 to 900°C

Answer

250 to 500°C

Answer

900 to 100°C

Answer

950 to 1300°C

Question 18

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

Question 19

19. Increasing skin cancer and high mutation rate are due to

Answer

CO₂ Pollution

Answer

CO pollution

Answer

Ozone depletion

Question 20

20. Septic tank is:

Answer

An anaerobic attached growth biological treatment system

Answer

An anaerobic suspended growth treatment system

Answer

An aerobic suspended growth biological treatment system

Answer

An aerobic attached growth treatment system

Question 21

21. Air pollution is not caused by

Answer

Pollen grains

Answer

Industries

Answer

Hydroelectric power

Answer

Automobiles

Question 22

22. Which of the following groups of plants can be used as indicators of SO pollution of air?

Answer

Epiphytic lichens

Answer

Liver worts

Answer

Home worts

Question 23

23. Atmospheric pollution caused by the exhaust gas of supersonic transport air-crafts is mostly in the atmospheric region called

Answer

Mesosphere

Answer

Thermosphere

Answer

Stratosphere

Answer

Troposphere

Question 24

24. Incineration of municipal waste is carried out in the temperature range of

Answer

250 to 500°C

Answer

900 to 1000°C

Answer

500 to 900°C

Answer

950 to 1300°C

Question 25

25. Which of the following fibers are made of polyamides?

Question 26

26. Fossil fuels like coal, oil, natural gas and metals are the examples of _________ resources.

Answer

Non-renewable

Question 27

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

Question 28

28. In fructose the possible optical isomers are

Question 29

29. Acid rains are produced by

Answer

Excess production of NH₃ by industry and coal gas

Answer

Excess formation of CO₂ by combustion and animal respiration

Answer

Excess release of carbon monoxide by incomplete combustion

Answer

Excess NO₂ and SO₂ from burning fossil fuels

Question 30

30. __________ are the resources that can be replenished by physical and biological means.

Answer

Non renewable

Question 31

31. Polymer formation from monomers starts by

Answer

Condensation reaction between monomers

Answer

Coordination reaction between monomers

Answer

Hydrolysis of monomers

Answer

Conversion of monomer to monomer ions by protons

Question 32

32. The molecular formula of a trisaccharide will be

Answer

C₁₈H₃₂O₁₆

Answer

C₃H₆O₃

Answer

C₁₈H₃₆O₁₈

Answer

C₃H₃O₃

Question 33

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

Answer

Secondary structure

Answer

Quaternary structure

Answer

Primary structure

Answer

Tertiary structure

Question 34

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

Answer

Non-renewable

Question 35

35. In Antarctica ozone depletion is due to the formation of following compound

Answer

SO₂ and SO₃

Answer

Chlorine nitrate

Answer

Peroxy acetyl nitrate

Question 36

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

Answer

Hydrosphere

Answer

Stratosphere

Answer

Lithosphere

Question 37

37. Which of the following is an example of ketohexose?

Question 38

38. Which treatment is not done with pulp before delivering it to paper making machine

Answer

Pulp is dispersed in water and slurry is obtained

Answer

Pressed to remove moisture

Answer

Addition of chemical additives

Answer

Mechanical beating of fibers

Question 39

39. The lowest layer of atmosphere is known as the

Answer

None of these

Answer

Ionosphere

Answer

Troposphere

Answer

Stratosphere

Question 40

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

Answer

Aerosols and high flying jets

Answer

Fungicides, insecticides, bactericides and

Answer

Balloons and turbo-prop airplanes

Answer

Atomic explosions and industrial wastes

Question 41

41. Sulphure dioxide affects

Answer

All membrane systems

Answer

Plasmodesmata

Question 42

42. Which one of the followings is non-woody raw material used for making pulp and paper?

Answer

Corn straw

Answer

Eucalyptus

Question 43

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

Question 44

44. Thickness of the atmosphere is

Question 45

45. Pick up the correct statement

Answer

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

Answer

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

Answer

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

Answer

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

Question 46

46. Environmental pollution affects

Answer

Biotic and abiotic components of environment

Answer

Plants only

Answer

Biotic components

Question 47

47. Fungicides are the pesticides which

Answer

Control the growth of fungus

Answer

Kill insects

Answer

Kill herbs

Answer

Kill plants

Question 48

48. When rain is accompanied by a thunderstorm. The collected rain water will have a pH value

Answer

Slightly lower than that of rain water without thunderstorm

Answer

Uninfluenced by occurrence of thunderstorm

Answer

Slightly higher than that when the thunderstorm is not there

Answer

Which depends on the amount of dust in air

Question 49

49. What is the function of Head box in paper making machine?

Answer

It dry the paper

Answer

It reduces the thickness of paper

Answer

It discharge the pulp at the screen of Fourdriner table

Answer

Web structure is consolidated

Question 50

50. Ozone hole is

Answer

Increase of concentration of O₃ in tropical region

Answer

Depletion in total amount of O₃ in particular region

Answer

Formation of a complex of O₃ with hydrocarbons

Answer

Decomposition of O₂ to O₃ in sunlight

Question 51

51. All fats are

Answer

Hydrocarbons

Answer

Carbohydrates

Question 52

52. SO₂ and NO₂ produce pollution by increasing

Answer

Buffer action

Answer

Neutrality

Answer

Alkalinity

Question 53

53. Which of the following is not present in nucleotide?

Question 54

54. Denaturation of protein means the structure of protein is disrupted indicate which factor does not denature protein

Answer

Oxidizing agent

Answer

Heat protein

Answer

pH changes

Answer

Keeping pH 7.35

Question 55

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

Question 56

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

Question 57

57. The structure of a polymer depends upon how the monomer – repeating unit joins to make a polymer. What is not the type of structure of a polymer?

Answer

Cross linked or inter connected polymer

Answer

Synthetic polymer

Answer

Linear polymer

Question 58

58. Soft drinks and baby feeding bottles are generally made up of

Answer

Polyurethane

Answer

Polystyrene

Question 59

59. Which substance is used to bleach the pulp?

Answer

Na₂SO₃

Question 60

60. Carbon monoxide is harmful to human beings as it

Answer

Is destructive to O₃

Answer

Has higher affinity for hemoglobin as compared to oxygen

Answer

Is carcinogenic

Answer

Is antagonistic to CO₂

Question 61

61. Ultraviolet radiation from sun causes a reaction that produces

Answer

Carbon monoxide

Answer

Sulphure dioxide

Question 62

62. In human liver, which substance cause cancer

Answer

Caron dioxide

Answer

Chloroform

Question 63

63. In the upper atmosphere chlorofluorocarbons (CFCO₃, CF₂Cl₂) are broken down to give chlorine radicals but not fluorine radicals. What is the best explanation for this

Answer

The chlorine atom is larger than the fluorine atom

Answer

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

Answer

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

Answer

Fluorine is more electronegative than chlorine

Question 64

64. A polymeric substance that is formed in the liquid state and then hardened to a rigid solid is called a

Answer

Polyester fiber

Answer 165

Polyvinyl chloride

Answer 166

Polyethene

Answer 167

None of these

Answer 168

Mineral fiber

Answer 169

Animal fiber

Answer 170

Vegetable fiber

Answer 171

Acts pesticide

Answer 172

Increases nitrogen contents of soil

Answer 173

Increases sulphur contents of soil

Answer 174

Increases oxygen contents of soil

Answer 175

A measure of the organic matter presents in water

Answer 176

Usually less than COD

Answer 177

All of these

Answer 178

Biochemical oxygen demand

Answer 179

Sodium (I)

Answer 180

Calcium (II)

Answer 181

Chromium (VI)

Answer 182

Chromium (III)

Answer 183

Air pollution

Answer 184

Water pollution

Answer 185

Radioactive pollution

Answer 186

Noise pollution

Answer 187

Carbon monoxide

Answer 188

Hydrocarbons

Answer 189

Sulphur dioxide

Answer 190

Carbon dioxide

Answer 191

Forming stable compound with hemoglobin

Answer 192

Combining with oxygen to form carbon dioxide

Answer 193

Preventing reaction between oxygen and hemoglobin

Answer 194

Destruction of hemoglobin

Answer 195

Paddy field

Answer 196

Wheat field

Answer 197

Can sugar field

Answer 198

Cotton field

Answer 199

Organic waste into drinking water

Answer 200

Industrial waste containing mercury into fishing water

Answer 201

Oil spill in water

Answer 202

Arsenic into the atmosphere

Answer 203

Ascorbic acid

Answer 204

Riboflavin

Answer 205

Unsaturated fatty acids

Answer 206

Glycerides of unsaturated fatty acids

Answer 207

Essential oils obtained from plants

Answer 208

Glycerides of saturated fatty acids

Answer 209

Mesosphere

Answer 210

Trophosphere

Answer 211

Thermosphere

Answer 212

Stratosphere

Answer 213

Is colourless

Answer 214

A natural phenomenon

Answer 215

A combination of smoke and fog

Answer 216

All of these

Answer 217

Dissolved oxygen

Answer 218

All of these

Answer 219

Microorganisms

Answer 220

Aquatic plants

Answer 221

Supply pure O₂ for breathing

Answer 222

All are correct

Answer 223

Drink dilute solution of CH₃COOH

Answer 224

Drink dilute solution of NaHCO₃

Answer 225

Excess NH₃

Answer 226

Low temperature

Answer 227

Excess SO₂

Answer 228

High temperature

Answer 229

Nitrogen oxides and chloro fluorocarbon

Answer 230

Carbon dioxide

Answer 231

Sulphure dioxide

Answer 232

Carbon dioxide

Answer 233

Livestock waste

Answer 234

Disposal of industrial effluents

Answer 235

Oil leaks and spills

Answer 236

Undesirable plant growth

Answer 237

Non-biodegradable foam

Answer 238

Primary pollutant

Answer 239

Coagulation

Answer 240

Secondary pollutant

Answer 241

Change in taste and odour

Answer 242

Blue baby syndrome

Answer 243

Intestinal irritation

Answer 244

Noise pollution

Answer 245

Water pollution

Answer 246

Radioactive pollution

Answer 247

Air pollution

Answer 248

Antarctica

Answer 249

Greater than 4 ppm

Answer 250

Greater than 8 ppm

Answer 251

Less than 4 ppm

Answer 252

4 – 8 ppm

Answer 253

Carbon monoxide

Answer 254

Sulphure dioxide

Answer 255

Nitrous oxide

Answer 256

Nilric oxide and unburnt hydrocarbons

Answer 257

NO and burnt hydrocarbons

Answer 258

N₂O and burnt hydrocarbons

Answer 259

Nitrons oxide and unburnt hydrocarbons

Answer 260

Calendar stock, Drying, pressing, flow spreader

Answer 261

Calendar stock, flow spreader, pressing drying

Answer 262

Flow spreader, Drying, pressing, calendar stock

Answer 263

Flow spreader, pressing, drying, calendar stock

Answer 264

To help plant to undergo photosynthesis

Answer 265

To destroy nitrogen oxide from the atmosphere

Answer 266

To help to clean the atmosphere

Answer 267

To help in fixing of bacteria

Answer 268

Fossil fuel

Answer 269

None of these

Answer 270

Heat dispersion

Answer 271

More than 1

Answer 272

None of these

Answer 273

Equal to 1

Answer 274

Less than 1

Answer 275

Glucose and maltose

Answer 276

Fructose and maltose

Answer 277

Glucose and fructose

Answer 278

Fructose and lactose

Answer 279

Safe for human consumption

Answer 280

The ground water

Answer 281

The Surface water

Answer 282

Now safe or human consumption

Answer 283

Nitric oxide

Answer 284

Nitrogen oxide

Answer 285

Nitrous oxide

Answer 286

Sulphure dioxide

Answer 287

Nucleic acid

Answer 288

Carbohydrate

Answer 289

All of these

Answer 290

Hopkins-cole

Answer 291

Xanthoproteic test

Answer 292

Hardness of water decreases

Answer 293

Dissolved oxygen increases

Answer 294

Cl₂ kills the pathogenic bacteria

Answer 295

pH of water is controlled

Answer 296

Chloramines

Answer 297

Plastic toys

Answer 298

None of these

Answer 299

Epoxy resin

Answer 300

Remove hardness

Answer 301

Kill germs

Answer 302

Remove suspended particles

Answer 303

Increase oxygen content

Answer 304

Equal to that of water

Answer 305

None of these

Answer 306

Less than that of water

Answer 307

More than that of water

Answer 308

Neutrality

Answer 309

Buffer action

Answer 310

Four secondary alcoholic group

Answer 311

One – CHO group

Answer 312

One primary alcoholic group

Answer 313

All are correct

Answer 314

Unpredictable

Answer 315

Remains same

Answer 316

Phthalic acid

Answer 317

Maleic acid

Answer 318

Malonic acid

Answer 319

Acetic acid

Answer 320

None of these

Answer 321

Global warming

Answer 322

Forest fires

Answer 323

Increased incidence of skin cancer

Answer 324

Developing hydrogen bonding in peptide chain

Answer 325

Unfolding of protein

Answer 326

Hydrolysis of protein

Answer 327

Three dimensional twisting and folding of peptide chain

Answer 328

Chlorophyll

Answer 329

Haemocyanin

Answer 330

Vitamin B₁₂

Answer 331

Carbonic anhydrase

Answer 332

Low temperature

Answer 333

Inhalation of seasonal pollen

Answer 334

Wet and dry environment

Answer 335

Eating of seasonal vegetables

Answer 336

Nutrient elements

Answer 337

Trace elements

Answer 338

Basic elements

Answer 339

Less than 5.6

Answer 340

Nickel Sulphate

Answer 341

Copper Sulphate

Answer 342

Barium Sulphate

Answer 343

250 to 500°C

Answer 344

900 to 1000°C

Answer 345

950 to 1300+C

Answer 346

500 to 900°C

Answer 347

Industrial discharges

Answer 348

Carbon dioxide

Answer 349

Sulphure dioxide

Answer 350

Liver cancer

Answer 351

Skin cancer

Answer 352

Mouth cancer

Answer 353

Lung cancer

Answer 354

Are made from petroleum

Answer 355

Burn to produce toxic fumes

Answer 356

Are very inflammable

Answer 357

Decompose to produce toxic products

Answer 358

Global warming

Answer 359

Sewage treatment plants

Answer 360

All of these

Answer 361

Urban and suburban lands

Answer 362

Fertilizer industry

Answer 363

Cement industry

Answer 364

Leather tanning

Answer 365

Water purification

Answer 366

Paper is wounded in the form of reel

Answer 367

Pulp is spread over fabric or screen

Answer 368

Moisture is removed

Answer 369

Paper thickness in reduced

Answer 370

UV rays reach the earth

Answer 371

Global warming

Answer 372

Greenhouse effect

Answer 373

Rapid growth of population

Answer 374

Industrialization

Answer 375

Urbanization

Answer 376

Increase of plantation

Answer 377

Troposhere is a dusty zone containing water vapor and clouds.

Answer 378

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

Answer 379

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

Answer 380

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

Answer 381

Cyclone separator

Answer 382

Fabric filter

Answer 383

Wet scrubber

Answer 384

Electrostatic precipitator

Answer 385

Both are polysaccharides

Answer 386

Both are formed by same type of monomers

Answer 387

Both can be found in living things

Answer 388

Cellulose is greater in amount on earth as compared to starch

Answer 389

Automobile exhausts

Answer 390

Radioactive fall out

Answer 391

Pesticide residue

Answer 392

Household waste

Answer 393

Sulphur oxide

Answer 394

Nitrogen oxide

Answer 395

Highly acidic

Answer 396

Polystyrene

Answer 397

Paddy rice

Answer 398

Sugar cane

Answer 399

Photochemical oxidants

Answer 400

Sulphur dioxide

Answer 401

Chlorofluorocarbon

Answer 402

SO₂ and NO₂

Answer 403

CO₂ and CO

Answer 404

SO₃ and CO

Answer 405

Ozone and dust

Answer 406

Air and soil

Answer 407

Air, water and soil

Answer 408

Air and water

Answer 409

2ppm – 6ppm

Answer 410

4ppm – 8ppm

Answer 411

2ppm – 4ppm

Answer 412

2ppm – 3ppm

Answer 413

Thermal power plant

Answer 414

All the above

Answer 415

Agro-industry

Answer 416

Fullerenes

Answer 417

Polyhalogens

Answer 418

Reduction in thickness of ozone layer in stratosphere

Answer 419

Increase concentration of ozone

Answer 420

Hole in ozone layers

Answer 421

Reduction of thickness of ozone in troposphere

Answer 422

Sewage treatment plant

Answer 423

All of the above

Answer 424

Solid waste disposal sites

Answer 425

Thermal power plant

Answer 426

Coagulation

Answer 427

Self-oxidation reduction

Answer 428

Chlorination

Answer 429

Biodegradable pollution

Answer 430

Air pollution

Answer 431

Non-biodegradable pollution

Answer 432

Polyethylene

Answer 433

Adipic acid

Answer 434

It is less effective than others

Answer 435

It becomes ineffective after some time

Answer 436

It is not easily/rapidly degraded on nature

Answer 437

Its high cost

Answer 438

Nitrogen peroxide

Answer 439

Sulphure dioxide

Answer 440

Calorimeter

Answer 441

Conductivity meter

Answer 442

Acidification of soil

Answer 443

Neutralization of soil

Answer 444

Drying of soil

Answer 445

Combustion of soil

Answer 446

Neutrality

Answer 447

Buffer action

Answer 448

Both b & c

Answer 449

Organic waste in drinking H₂O

Answer 450

Oil spills in H₂O

Answer 451

Industrial waste Having Hg

Answer 452

Arsenic (As) into atmosphere

Answer 453

Sulphate ion (SO₄²¯)

Answer 454

Dichromate ion (Cr₂O₇²¯)

Answer 455

Chromate ion (CrO₄²¯)

Answer 456

Permanganate ion (MnO₄)

Answer 457

Treatment with chlorine

Answer 458

Treatment with Iodine

Answer 459

Coagulation

Answer 460

Chlorobenzene

Answer 461

Acetaldehyde

Answer 462

Formaldehyde

Answer 463

Non-renewable

Answer 464

Carbon dioxide

Answer 465

Carbon monoxide

Answer 466

Purification

Answer 467

Coagulation

Answer 468

Chlorination

Answer 469

Combustion

Answer 470

Automobile exhausts

Answer 471

Smoke/fly ash

Answer 472

2, 4-D and pesticides

Answer 473

Sewage and agricultural fertilizers

Answer 474

Phosphate rocks and sewage

Answer 475

Weathering of phosphate rocks only

Answer 476

Agricultural fertilizers

Answer 477

Homopolymer

Answer 478

Terpolymer

Answer 479

Heteropolymer

Answer 480

Thermoplastics

Answer 481

Elastomers

Answer 482

Thermosetting polymers

Answer 483

Increased shinning

Answer 484

Harmful stress

Answer 485

Becoming dirty

Answer 486

Chromium III

Answer 487

Chromium VI

Answer 488

Chromium V

Answer 489

Chromium IV

Answer 490

Pesticide residue

Answer 491

Household waste

Answer 492

Automobile exhausts

Answer 493

Radio-active fall out

Answer 494

Growing population

Answer 495

Clean drinking water

Answer 496

Shortage of food

Answer 497

Unemployment

Answer 498

Hydrosphere

Answer 499

Atmosphere

Answer 500

Lithosphere

Answer 501

Allotropes

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