Environmental Chemistry Online Mcqs Test

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Question 1

1. Which statement is incorrect about starch and cellulose?

Answer

Both are formed by same type of monomers

Answer

Cellulose is greater in amount on earth as compared to starch

Answer

Both are polysaccharides

Answer

Both can be found in living things

Question 2

2. Drawback DDT as pesticide is

Answer

It is less effective than others

Answer

It becomes ineffective after some time

Answer

Its high cost

Answer

It is not easily/rapidly degraded on nature

Question 3

3. Chief source of water and soil pollution is

Answer

Thermal power plant

Answer

All the above

Answer

Agro-industry

Question 4

4. Particulates (< 1μm size) remaining suspended in air indefinitely and transported by wind currents are called

Question 5

5. Spraying of DDT produces pollution of

Answer

Air and soil

Answer

Air and water

Answer

Air, water and soil

Question 6

6. Which of the following is fully fluorinated polymer?

Question 7

7. Polymer formation from monomers starts by

Answer

Condensation reaction between monomers

Answer

Conversion of monomer to monomer ions by protons

Answer

Coordination reaction between monomers

Answer

Hydrolysis of monomers

Question 8

8. Which one of the following species is more dangerous and cause cancer?

Answer

Sodium (I)

Answer

Chromium (VI)

Answer

Calcium (II)

Answer

Chromium (III)

Question 9

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

Question 10

10. Carbon monoxide is harmful to human beings as it

Answer

Is destructive to O₃

Answer

Is carcinogenic

Answer

Is antagonistic to CO₂

Answer

Has higher affinity for hemoglobin as compared to oxygen

Question 11

11. Increased asthmatic attacks in certain seasons are related to

Answer

Inhalation of seasonal pollen

Answer

Low temperature

Answer

Wet and dry environment

Answer

Eating of seasonal vegetables

Question 12

12. Result of ozone hole is

Answer

Global warming

Answer

Greenhouse effect

Answer

UV rays reach the earth

Question 13

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

Answer

Pesticide residue

Answer

Household waste

Answer

Automobile exhausts

Answer

Radio-active fall out

Question 14

14. Drained sewage has B.OD.

Answer

Equal to that of water

Answer

None of these

Answer

More than that of water

Answer

Less than that of water

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 one of the following is not a pollutant

Question 17

17. As it passes into food chain, the concentration of DDT

Answer

Remains same

Answer

Unpredictable

Question 18

18. Choose the crop for which ammonium nitrate is nit used

Answer

Sugar cane

Answer

Paddy rice

Question 19

19. The concentration of dissolved molecular oxygen in water which acts as the most important oxidizing agent ranges from

Answer

2ppm – 4ppm

Answer

2ppm – 3ppm

Answer

2ppm – 6ppm

Answer

4ppm – 8ppm

Question 20

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

Answer

More soluble as compared to smaller crystals

Answer

Less toxic

Answer

Easy to spread in the field

Answer

Assimilated in the root hairs of plants

Question 21

21. Septic tank is:

Answer

An anaerobic suspended growth treatment system

Answer

An aerobic suspended growth biological treatment system

Answer

An anaerobic attached growth biological treatment system

Answer

An aerobic attached growth treatment system

Question 22

22. Glyptal polymer is obtained from glycerol on reacting with

Answer

Maleic acid

Answer

Acetic acid

Answer

Phthalic acid

Answer

Malonic acid

Question 23

23. Bakelite is obtained from phenol by reacting with

Answer

Chlorobenzene

Answer

Acetaldehyde

Answer

Formaldehyde

Question 24

24. The concentration of water vapour in troposphere, which depends upon the altitude & temperature varies in the range of zero to _____________ percent.

Question 25

25. Thermoplastic polymer can be softened and hardened when cool repeatedly. Which one is not a thermoplastic among the following?

Answer

None of these

Answer

Plastic toys

Answer

Epoxy resin

Question 26

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

Question 27

27. Lithosphere has amount of silicon

Question 28

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

Answer

Increased shinning

Answer

Becoming dirty

Answer

Harmful stress

Question 29

29. Which one of the following compounds is not of a polymer?

Question 30

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

Question 31

31. Farmers and gardeners often treat soil with urea because it will

Answer

Increases oxygen contents of soil

Answer

Increases nitrogen contents of soil

Answer

Increases sulphur contents of soil

Answer

Acts pesticide

Question 32

32. Atmospheric pollutant is

Question 33

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

Answer

Polyester fiber

Question 34

34. When urea is applied to crop it quickly hydrolysis to give ammonium carbonate, which is unstable and decomposes to release the gas

Question 35

35. SO₂ and NO₂ produce pollution by increasing

Answer

Buffer action

Answer

Neutrality

Answer

Alkalinity

Question 36

36. BOD/COD ratio will always be:

Answer

More than 1

Answer

Equal to 1

Answer

None of these

Answer

Less than 1

Question 37

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

Answer

Global warming

Question 38

38. Water is often treated with chlorine to

Answer

Increase oxygen content

Answer

Remove hardness

Answer

Remove suspended particles

Answer

Kill germs

Question 39

39. The elements like calcium, nitrogen and phosphorus added into the soil in large amounts are called

Answer

Trace elements

Answer

Nutrient elements

Answer

Basic elements

Question 40

40. Ozone hole refers to

Answer

Reduction of thickness of ozone in troposphere

Answer

Increase concentration of ozone

Answer

Reduction in thickness of ozone layer in stratosphere

Answer

Hole in ozone layers

Question 41

41. Air pollution is not caused by

Answer

Pollen grains

Answer

Industries

Answer

Automobiles

Answer

Hydroelectric power

Question 42

42. The main pollutant of leather tanneries in the waste water is

Answer

Chromium IV

Answer

Chromium III

Answer

Chromium V

Answer

Chromium VI

Question 43

43. Which process is not involved to improve the qualities of raw water?

Answer

Coagulation

Answer

Chlorination

Answer

Self-oxidation reduction

Question 44

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

Question 45

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

Answer

None of these

Answer

Fossil fuel

Answer

Heat dispersion

Question 46

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

Question 47

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

Question 48

48. Which one of the following is used as coagulant for purification potable water?

Answer

Barium Sulphate

Answer

Nickel Sulphate

Answer

Copper Sulphate

Question 49

49. Which of the following is used as water disinfectant to avoid the formation of toxic compounds?

Answer

Both b & c

Question 50

50. Minamata disease is due to pollution of

Answer

Industrial waste containing mercury into fishing water

Answer

Oil spill in water

Answer

Arsenic into the atmosphere

Answer

Organic waste into drinking water

Question 51

51. Domestic waste mostly constitutes

Answer

Air pollution

Answer

Biodegradable pollution

Answer

Non-biodegradable pollution

Question 52

52. Two vitamins absorbed from intestine along with fats are

Question 53

53. In human liver, which substance cause cancer

Answer

Caron dioxide

Answer

Chloroform

Question 54

54. Fungicides are the pesticides which

Answer

Kill herbs

Answer

Kill insects

Answer

Control the growth of fungus

Answer

Kill plants

Question 55

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

Answer

Shortage of food

Answer

Clean drinking water

Answer

Unemployment

Answer

Growing population

Question 56

56. Soil salinity can be measured by

Answer

Calorimeter

Answer

Conductivity meter

Question 57

57. Which field produces significant amount of methane in the atmosphere?

Answer

Can sugar field

Answer

Wheat field

Answer

Paddy field

Answer

Cotton field

Question 58

58. The prosthetic group is glycoprotein is

Answer

Nucleic acid

Answer

Carbohydrate

Question 59

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

Question 60

60. Which one of the following is not type of polymer?

Answer

Homopolymer

Answer

Heteropolymer

Answer

Terpolymer

Question 61

61. Carbon monoxide is pollutant as it

Answer

Inhibits glycolysis

Answer

Combines with hemoglobin

Answer

Inactivates nerves

Answer

Combines with oxygen

Question 62

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

Answer

Non renewable

Question 63

63. Chromium (VI is used in)

Answer

Leather tanning

Answer

Cement industry

Answer

Fertilizer industry

Answer

Water purification

Question 64

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

Answer 152

Flow spreader, Drying, pressing, calendar stock

Answer 153

Calendar stock, Drying, pressing, flow spreader

Answer 154

Flow spreader, pressing, drying, calendar stock

Answer 155

Calendar stock, flow spreader, pressing drying

Answer 156

Eucalyptus

Answer 157

Corn straw

Answer 158

Secondary pollutant

Answer 159

Coagulation

Answer 160

Primary pollutant

Answer 161

Photochemical oxidants

Answer 162

Sulphur dioxide

Answer 163

Chlorofluorocarbon

Answer 164

To help to clean the atmosphere

Answer 165

To destroy nitrogen oxide from the atmosphere

Answer 166

To help plant to undergo photosynthesis

Answer 167

To help in fixing of bacteria

Answer 168

Noise pollution

Answer 169

Water pollution

Answer 170

Air pollution

Answer 171

Radioactive pollution

Answer 172

Plants only

Answer 173

Biotic components

Answer 174

Biotic and abiotic components of environment

Answer 175

Oxides of nitrogen

Answer 176

None of these

Answer 177

Oxides of sulphur

Answer 178

Oxides of carbon

Answer 179

Moisture is removed

Answer 180

Paper thickness in reduced

Answer 181

Paper is wounded in the form of reel

Answer 182

Pulp is spread over fabric or screen

Answer 183

Polyhalogens

Answer 184

Fullerenes

Answer 185

C₃H₆O₃

Answer 186

C₁₈H₃₂O₁₆

Answer 187

C₃H₃O₃

Answer 188

C₁₈H₃₆O₁₈

Answer 189

A combination of smoke and fog

Answer 190

All of these

Answer 191

A natural phenomenon

Answer 192

Is colourless

Answer 193

Burn to produce toxic fumes

Answer 194

Decompose to produce toxic products

Answer 195

Are very inflammable

Answer 196

Are made from petroleum

Answer 197

All membrane systems

Answer 198

Plasmodesmata

Answer 199

Sulphate ion (SO₄²¯)

Answer 200

Dichromate ion (Cr₂O₇²¯)

Answer 201

Permanganate ion (MnO₄)

Answer 202

Chromate ion (CrO₄²¯)

Answer 203

Carbon dioxide

Answer 204

Sulphur dioxide

Answer 205

Carbon monoxide

Answer 206

Dissolved oxygen

Answer 207

All of these

Answer 208

Drink dilute solution of CH₃COOH

Answer 209

Supply pure O₂ for breathing

Answer 210

All are correct

Answer 211

Drink dilute solution of NaHCO₃

Answer 212

Dissolved oxygen

Answer 213

Dissolved salts

Answer 214

Dissolved hydrogen

Answer 215

All of these

Answer 216

Glucose and fructose

Answer 217

Fructose and lactose

Answer 218

Glucose and maltose

Answer 219

Fructose and maltose

Answer 220

Biosphere oxygen demand

Answer 221

Biological oxygen demand

Answer 222

Biological oxygen deficit

Answer 223

None of these

Answer 224

Pesticide residue

Answer 225

Household waste

Answer 226

Automobile exhausts

Answer 227

Radioactive fall out

Answer 228

Troposphere

Answer 229

Thermosphere

Answer 230

Mesosphere

Answer 231

Stratosphere

Answer 232

Oil spills in H₂O

Answer 233

Industrial waste Having Hg

Answer 234

Arsenic (As) into atmosphere

Answer 235

Organic waste in drinking H₂O

Answer 236

Neutrality

Answer 237

Buffer action

Answer 238

Flood in Ravi

Answer 239

Air pollutants from Lahore chemical industries

Answer 240

Temperature mediated spoilage of marble

Answer 241

All of these

Answer 242

Rapid growth of population

Answer 243

Industrialization

Answer 244

Increase of plantation

Answer 245

Urbanization

Answer 246

Less than 5.6

Answer 247

Chromium (VI)

Answer 248

Chromium (III)

Answer 249

Non-renewable

Answer 250

Chlorophyll

Answer 251

Carbonic anhydrase

Answer 252

Haemocyanin

Answer 253

Vitamin B₁₂

Answer 254

Carbon dioxide

Answer 255

Carbon monoxide

Answer 256

Home worts

Answer 257

Liver worts

Answer 258

Epiphytic lichens

Answer 259

900 to 100°C

Answer 260

950 to 1300°C

Answer 261

500 to 900°C

Answer 262

250 to 500°C

Answer 263

Lithosphere

Answer 264

Stratosphere

Answer 265

Hydrosphere

Answer 266

Mineral fiber

Answer 267

Vegetable fiber

Answer 268

Animal fiber

Answer 269

None of these

Answer 270

Antarctica

Answer 271

Hydrocarbons

Answer 272

Carbohydrates

Answer 273

Cyclone separator

Answer 274

Electrostatic precipitator

Answer 275

Fabric filter

Answer 276

Wet scrubber

Answer 277

Carbon monoxide

Answer 278

Sulphure dioxide

Answer 279

Forming stable compound with hemoglobin

Answer 280

Destruction of hemoglobin

Answer 281

Preventing reaction between oxygen and hemoglobin

Answer 282

Combining with oxygen to form carbon dioxide

Answer 283

The chlorine atom is larger than the fluorine atom

Answer 284

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

Answer 285

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

Answer 286

Fluorine is more electronegative than chlorine

Answer 287

One primary alcoholic group

Answer 288

All are correct

Answer 289

One – CHO group

Answer 290

Four secondary alcoholic group

Answer 291

Carbon dioxide

Answer 292

Carbon dioxide

Answer 293

Sulphure dioxide

Answer 294

Nitrogen oxides and chloro fluorocarbon

Answer 295

It dry the paper

Answer 296

It reduces the thickness of paper

Answer 297

It discharge the pulp at the screen of Fourdriner table

Answer 298

Web structure is consolidated

Answer 299

250 to 500°C

Answer 300

900 to 1000°C

Answer 301

500 to 900°C

Answer 302

950 to 1300+C

Answer 303

SO₃ and CO

Answer 304

SO₂ and NO₂

Answer 305

CO₂ and CO

Answer 306

Ozone and dust

Answer 307

Neutralization of soil

Answer 308

Drying of soil

Answer 309

Combustion of soil

Answer 310

Acidification of soil

Answer 311

Change in taste and odour

Answer 312

Intestinal irritation

Answer 313

Blue baby syndrome

Answer 314

Greater than 4 ppm

Answer 315

Less than 4 ppm

Answer 316

4 – 8 ppm

Answer 317

Greater than 8 ppm

Answer 318

Cl₂ kills the pathogenic bacteria

Answer 319

Hardness of water decreases

Answer 320

Dissolved oxygen increases

Answer 321

pH of water is controlled

Answer 322

950 to 1300°C

Answer 323

900 to 1000°C

Answer 324

500 to 900°C

Answer 325

250 to 500°C

Answer 326

Carbon monoxide

Answer 327

Chlorofluorocarbons and nitrogen oxides

Answer 328

Carbon dioxide

Answer 329

Sulphur oxide

Answer 330

Nitrous oxide

Answer 331

Carbon monoxide

Answer 332

Sulphure dioxide

Answer 333

Neutrality

Answer 334

Buffer action

Answer 335

Polyurethane

Answer 336

Polystyrene

Answer 337

pH changes

Answer 338

Heat protein

Answer 339

Oxidizing agent

Answer 340

Keeping pH 7.35

Answer 341

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

Answer 342

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

Answer 343

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

Answer 344

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

Answer 345

Highly acidic

Answer 346

Unsaturated fatty acids

Answer 347

Essential oils obtained from plants

Answer 348

Glycerides of saturated fatty acids

Answer 349

Glycerides of unsaturated fatty acids

Answer 350

Hydrocarbons

Answer 351

Sulphur dioxide

Answer 352

Carbon monoxide

Answer 353

Carbon dioxide

Answer 354

Radioactive pollution

Answer 355

Water pollution

Answer 356

Noise pollution

Answer 357

Air pollution

Answer 358

Atmosphere

Answer 359

Lithosphere

Answer 360

Hydrosphere

Answer 361

Thermal power plant

Answer 362

Solid waste disposal sites

Answer 363

Sewage treatment plant

Answer 364

All of the above

Answer 365

Na₂SO₃

Answer 366

Decomposition of O₂ to O₃ in sunlight

Answer 367

Increase of concentration of O₃ in tropical region

Answer 368

Formation of a complex of O₃ with hydrocarbons

Answer 369

Depletion in total amount of O₃ in particular region

Answer 370

Adipic acid

Answer 371

Sewage treatment plants

Answer 372

Urban and suburban lands

Answer 373

All of these

Answer 374

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

Answer 375

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

Answer 376

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

Answer 377

Troposhere is a dusty zone containing water vapor and clouds.

Answer 378

Nitrous oxide

Answer 379

Sulphure dioxide

Answer 380

Nitric oxide

Answer 381

Nitrogen oxide

Answer 382

Livestock waste

Answer 383

Oil leaks and spills

Answer 384

Disposal of industrial effluents

Answer 385

Chloramines

Answer 386

All the above

Answer 387

Removal of top soil

Answer 388

Conservation of energy

Answer 389

Release of toxic/undesirable materials in environment

Answer 390

Tertiary structure

Answer 391

Primary structure

Answer 392

Secondary structure

Answer 393

Quaternary structure

Answer 394

A measure of the organic matter presents in water

Answer 395

All of these

Answer 396

Biochemical oxygen demand

Answer 397

Usually less than COD

Answer 398

Xanthoproteic test

Answer 399

All of these

Answer 400

Hopkins-cole

Answer 401

Pressed to remove moisture

Answer 402

Addition of chemical additives

Answer 403

Mechanical beating of fibers

Answer 404

Pulp is dispersed in water and slurry is obtained

Answer 405

Allotropes

Answer 406

Riboflavin

Answer 407

Ascorbic acid

Answer 408

Purification

Answer 409

Coagulation

Answer 410

Chlorination

Answer 411

Combustion

Answer 412

Non-renewable

Answer 413

NO and burnt hydrocarbons

Answer 414

Nilric oxide and unburnt hydrocarbons

Answer 415

N₂O and burnt hydrocarbons

Answer 416

Nitrons oxide and unburnt hydrocarbons

Answer 417

Polystyrene

Answer 418

2, 4-D and pesticides

Answer 419

Automobile exhausts

Answer 420

Smoke/fly ash

Answer 421

Nitrogen peroxide

Answer 422

Sulphure dioxide

Answer 423

Safe for human consumption

Answer 424

The ground water

Answer 425

Now safe or human consumption

Answer 426

The Surface water

Answer 427

Aquatic plants

Answer 428

Microorganisms

Answer 429

Thermosphere

Answer 430

Trophosphere

Answer 431

Mesosphere

Answer 432

Stratosphere

Answer 433

Organic matter

Answer 434

None of these

Answer 435

Microbes and organic matter

Answer 436

Aerosols and high flying jets

Answer 437

Balloons and turbo-prop airplanes

Answer 438

Fungicides, insecticides, bactericides and

Answer 439

Atomic explosions and industrial wastes

Answer 440

Thermosetting polymers

Answer 441

Thermoplastics

Answer 442

Elastomers

Answer 443

Sulphur oxide

Answer 444

Nitrogen oxide

Answer 445

Ozone depletion

Answer 446

CO₂ Pollution

Answer 447

CO pollution

Answer 448

Ionosphere

Answer 449

Troposphere

Answer 450

None of these

Answer 451

Stratosphere

Answer 452

Developing hydrogen bonding in peptide chain

Answer 453

Hydrolysis of protein

Answer 454

Unfolding of protein

Answer 455

Three dimensional twisting and folding of peptide chain

Answer 456

Polyethylene

Answer 457

Non-renewable

Answer 458

Liver cancer

Answer 459

Mouth cancer

Answer 460

Lung cancer

Answer 461

Skin cancer

Answer 462

Agricultural fertilizers

Answer 463

Sewage and agricultural fertilizers

Answer 464

Weathering of phosphate rocks only

Answer 465

Phosphate rocks and sewage

Answer 466

Which depends on the amount of dust in air

Answer 467

Slightly higher than that when the thunderstorm is not there

Answer 468

Slightly lower than that of rain water without thunderstorm

Answer 469

Uninfluenced by occurrence of thunderstorm

Answer 470

Industrial discharges

Answer 471

Sulphure dioxide

Answer 472

Carbon dioxide

Answer 473

SO₂ and SO₃

Answer 474

Peroxy acetyl nitrate

Answer 475

Chlorine nitrate

Answer 476

Chemical composition

Answer 477

Manufacturing process

Answer 478

All of these

Answer 479

Physical properties

Answer 480

Low temperature

Answer 481

High temperature

Answer 482

Excess NH₃

Answer 483

Excess SO₂

Answer 484

Polyvinyl chloride

Answer 485

Polyethene

Answer 486

Non-biodegradable foam

Answer 487

Undesirable plant growth

Answer 488

None of these

Answer 489

Increased incidence of skin cancer

Answer 490

Forest fires

Answer 491

Global warming

Answer 492

Cross linked or inter connected polymer

Answer 493

Linear polymer

Answer 494

Synthetic polymer

Answer 495

Coagulation

Answer 496

Treatment with Iodine

Answer 497

Treatment with chlorine

Answer 498

Excess NO₂ and SO₂ from burning fossil fuels

Answer 499

Excess release of carbon monoxide by incomplete combustion

Answer 500

Excess production of NH₃ by industry and coal gas

Answer 501

Excess formation of CO₂ by combustion and animal respiration

Total Questions:	201
Time Allowed:	60 Minutes
Total Marks:	201
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