Environmental Chemistry Online Mcqs Test

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Question 1

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

Answer

Lithosphere

Answer

Stratosphere

Answer

Hydrosphere

Question 2

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

Answer

Heteropolymer

Answer

Homopolymer

Answer

Terpolymer

Question 3

3. Which of the following is a biodegradable polymer?

Answer

Polyvinyl chloride

Answer

Polyethene

Question 4

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

Answer

Epoxy resin

Answer

None of these

Answer

Plastic toys

Question 5

5. The combination of smoke and fog is called

Answer

Primary pollutant

Answer

Secondary pollutant

Answer

Coagulation

Question 6

6. Glucose contains

Answer

One – CHO group

Answer

Four secondary alcoholic group

Answer

All are correct

Answer

One primary alcoholic group

Question 7

7. Which statement is incorrect about starch and cellulose?

Answer

Both can be found in living things

Answer

Both are formed by same type of monomers

Answer

Both are polysaccharides

Answer

Cellulose is greater in amount on earth as compared to starch

Question 8

8. Nutrient leach is due to

Answer

Acidification of soil

Answer

Combustion of soil

Answer

Drying of soil

Answer

Neutralization of soil

Question 9

9. Denaturing of protein is:

Answer

Unfolding of protein

Answer

Developing hydrogen bonding in peptide chain

Answer

Three dimensional twisting and folding of peptide chain

Answer

Hydrolysis of protein

Question 10

10. ___________ are those resources which once used on exhausted cannot be reused.

Answer

Non-renewable

Question 11

11. Vegetables oils are

Answer

Glycerides of unsaturated fatty acids

Answer

Essential oils obtained from plants

Answer

Glycerides of saturated fatty acids

Answer

Unsaturated fatty acids

Question 12

12. Surface and ground water sources are contaminated by various human activities. Which of the following is not a human activity that causes contamination in fresh water?

Answer

Disposal of industrial effluents

Answer

Livestock waste

Answer

Oil leaks and spills

Question 13

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

Answer

Primary structure

Answer

Secondary structure

Answer

Tertiary structure

Answer

Quaternary structure

Question 14

14. Ozone hole is maximum over

Answer

Antarctica

Question 15

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

Answer

Which depends on the amount of dust in air

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

Question 16

16. In human liver, which substance cause cancer

Answer

Chloroform

Answer

Caron dioxide

Question 17

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

Answer

Non-renewable

Question 18

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

Answer

Non renewable

Question 19

19. Which substance is used to bleach the pulp?

Answer

Na₂SO₃

Question 20

20. Thickness of the atmosphere is

Question 21

21. Acid rain is due to increase in atmospheric concentration of

Answer

SO₃ and CO

Answer

SO₂ and NO₂

Answer

CO₂ and CO

Answer

Ozone and dust

Question 22

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

Question 23

23. On hydrolysis sucrose gives

Answer

Fructose and lactose

Answer

Glucose and maltose

Answer

Fructose and maltose

Answer

Glucose and fructose

Question 24

24. Swage water is purified by

Answer

Aquatic plants

Answer

Microorganisms

Question 25

25. Which one of the following dissolves more rapidly in blood hemoglobin than oxygen?

Answer

Carbon monoxide

Answer

Nitrous oxide

Answer

Sulphure dioxide

Question 26

26. Pollution is

Answer

Removal of top soil

Answer

All the above

Answer

Release of toxic/undesirable materials in environment

Answer

Conservation of energy

Question 27

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

Question 28

28. Bakelite is obtained from phenol by reacting with

Answer

Acetaldehyde

Answer

Chlorobenzene

Answer

Formaldehyde

Question 29

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

Answer

Less toxic

Answer

Assimilated in the root hairs of plants

Answer

Easy to spread in the field

Answer

More soluble as compared to smaller crystals

Question 30

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

Answer

Global warming

Question 31

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

Answer

Non-renewable

Question 32

32. An example of water soluble vitamin is

Question 33

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

Answer

Buffer action

Answer

Neutrality

Question 34

34. Burning of fossil is the main source of pollution

Answer

Nitrous oxide

Answer

Sulphure dioxide

Answer

Nitric oxide

Answer

Nitrogen oxide

Question 35

35. Acid rains are produced by

Answer

Excess production of NH₃ by industry and coal gas

Answer

Excess release of carbon monoxide by incomplete combustion

Answer

Excess NO₂ and SO₂ from burning fossil fuels

Answer

Excess formation of CO₂ by combustion and animal respiration

Question 36

36. Eutrophication causes reduction in

Answer

Dissolved oxygen

Answer

All of these

Answer

Dissolved hydrogen

Answer

Dissolved salts

Question 37

37. Cyclone collector is used to reduce

Answer

Noise pollution

Answer

Radioactive pollution

Answer

Water pollution

Answer

Air pollution

Question 38

38. To avoid the formation of toxic compounds with chlorine which substance is sued for disinfecting water?

Answer

Chloramines

Question 39

39. 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 the C – Cl bond

Answer

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

Answer

Fluorine is more electronegative than chlorine

Question 40

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

Question 41

41. The molecular formula of a trisaccharide will be

Answer

C₃H₃O₃

Answer

C₃H₆O₃

Answer

C₁₈H₃₂O₁₆

Answer

C₁₈H₃₆O₁₈

Question 42

42. Natural fertilizer provides potassium in the form of K₂O potash

Question 43

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

Answer

Sodium (I)

Answer

Calcium (II)

Answer

Chromium (III)

Answer

Chromium (VI)

Question 44

44. Fungicides are the pesticides which

Answer

Kill plants

Answer

Kill insects

Answer

Kill herbs

Answer

Control the growth of fungus

Question 45

45. BOD/COD ratio will always be:

Answer

Equal to 1

Answer

More than 1

Answer

Less than 1

Answer

None of these

Question 46

46. Septic tank is:

Answer

An anaerobic attached growth biological treatment system

Answer

An aerobic suspended growth biological treatment system

Answer

An anaerobic suspended growth treatment system

Answer

An aerobic attached growth treatment system

Question 47

47. Water is often treated with chlorine to

Answer

Remove hardness

Answer

Remove suspended particles

Answer

Kill germs

Answer

Increase oxygen content

Question 48

48. Depletion of ozone layer is due to

Answer

Oxides of carbon

Answer

Oxides of sulphur

Answer

Oxides of nitrogen

Answer

None of these

Question 49

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

Answer

None of these

Answer

Fossil fuel

Answer

Heat dispersion

Question 50

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

Question 51

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

Answer

Epiphytic lichens

Answer

Home worts

Answer

Liver worts

Question 52

52. 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 53

53. Which sequence of steps is correct in paper making from pulp?

Answer

Flow spreader, Drying, pressing, calendar stock

Answer

Calendar stock, flow spreader, pressing drying

Answer

Flow spreader, pressing, drying, calendar stock

Answer

Calendar stock, Drying, pressing, flow spreader

Question 54

54. The raw material to form nylon is

Answer

Adipic acid

Question 55

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

Question 56

56. Which of the following is not a marine pollutant?

Answer

All of these

Answer

Dissolved oxygen

Question 57

57. Which of the following has magnesium?

Answer

Vitamin B₁₂

Answer

Carbonic anhydrase

Answer

Chlorophyll

Answer

Haemocyanin

Question 58

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

Answer

Sewage treatment plants

Answer

Urban and suburban lands

Answer

All of these

Question 59

59. Atmospheric pollutant is

Question 60

60. Of the following a step growth polymer

Answer

Polyethylene

Question 61

61. A sequence of how many nucleotides in messenger RNA makes a codon for an amino acid

Question 62

62. In fructose the possible optical isomers are

Question 63

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

Question 64

64. Which one is not a pollutant normally?

Answer

Hydrocarbons

Answer

Sulphur dioxide

Answer

Carbon dioxide

Answer

Carbon monoxide

Answer 159

Agro-industry

Answer 160

Thermal power plant

Answer 161

All the above

Answer 162

Hydrolysis of monomers

Answer 163

Condensation reaction between monomers

Answer 164

Conversion of monomer to monomer ions by protons

Answer 165

Coordination reaction between monomers

Answer 166

Riboflavin

Answer 167

Ascorbic acid

Answer 168

Acts pesticide

Answer 169

Increases sulphur contents of soil

Answer 170

Increases oxygen contents of soil

Answer 171

Increases nitrogen contents of soil

Answer 172

Less than 5.6

Answer 173

2, 4-D and pesticides

Answer 174

Smoke/fly ash

Answer 175

Automobile exhausts

Answer 176

Lithosphere

Answer 177

Hydrosphere

Answer 178

Atmosphere

Answer 179

Corn straw

Answer 180

Eucalyptus

Answer 181

Inhibits glycolysis

Answer 182

Combines with hemoglobin

Answer 183

Inactivates nerves

Answer 184

Combines with oxygen

Answer 185

Mouth cancer

Answer 186

Skin cancer

Answer 187

Lung cancer

Answer 188

Liver cancer

Answer 189

Oxidizing agent

Answer 190

Heat protein

Answer 191

Keeping pH 7.35

Answer 192

pH changes

Answer 193

Destruction of hemoglobin

Answer 194

Combining with oxygen to form carbon dioxide

Answer 195

Forming stable compound with hemoglobin

Answer 196

Preventing reaction between oxygen and hemoglobin

Answer 197

Low temperature

Answer 198

Inhalation of seasonal pollen

Answer 199

Eating of seasonal vegetables

Answer 200

Wet and dry environment

Answer 201

Pollen grains

Answer 202

Hydroelectric power

Answer 203

Industries

Answer 204

Automobiles

Answer 205

Less than that of water

Answer 206

Equal to that of water

Answer 207

More than that of water

Answer 208

None of these

Answer 209

Chromium (III)

Answer 210

Chromium (VI)

Answer 211

CO₂ Pollution

Answer 212

Ozone depletion

Answer 213

CO pollution

Answer 214

Safe for human consumption

Answer 215

The Surface water

Answer 216

The ground water

Answer 217

Now safe or human consumption

Answer 218

Chlorine nitrate

Answer 219

Peroxy acetyl nitrate

Answer 220

SO₂ and SO₃

Answer 221

Copper Sulphate

Answer 222

Nickel Sulphate

Answer 223

Barium Sulphate

Answer 224

Intestinal irritation

Answer 225

Change in taste and odour

Answer 226

Blue baby syndrome

Answer 227

Carbohydrates

Answer 228

Hydrocarbons

Answer 229

Treatment with chlorine

Answer 230

Treatment with Iodine

Answer 231

Coagulation

Answer 232

All of these

Answer 233

Chemical composition

Answer 234

Physical properties

Answer 235

Manufacturing process

Answer 236

Pressed to remove moisture

Answer 237

Addition of chemical additives

Answer 238

Mechanical beating of fibers

Answer 239

Pulp is dispersed in water and slurry is obtained

Answer 240

Nitrogen oxide

Answer 241

Sulphur oxide

Answer 242

Buffer action

Answer 243

Neutrality

Answer 244

Remains same

Answer 245

Unpredictable

Answer 246

Polyester fiber

Answer 247

A combination of smoke and fog

Answer 248

Is colourless

Answer 249

All of these

Answer 250

A natural phenomenon

Answer 251

250 to 500°C

Answer 252

900 to 1000°C

Answer 253

950 to 1300°C

Answer 254

500 to 900°C

Answer 255

Sulphate ion (SO₄²¯)

Answer 256

Chromate ion (CrO₄²¯)

Answer 257

Dichromate ion (Cr₂O₇²¯)

Answer 258

Permanganate ion (MnO₄)

Answer 259

Carbohydrate

Answer 260

Nucleic acid

Answer 261

Excess NH₃

Answer 262

Low temperature

Answer 263

Excess SO₂

Answer 264

High temperature

Answer 265

All are correct

Answer 266

Supply pure O₂ for breathing

Answer 267

Drink dilute solution of CH₃COOH

Answer 268

Drink dilute solution of NaHCO₃

Answer 269

A measure of the organic matter presents in water

Answer 270

Biochemical oxygen demand

Answer 271

All of these

Answer 272

Usually less than COD

Answer 273

Both b & c

Answer 274

Carbon monoxide

Answer 275

Carbon dioxide

Answer 276

Linear polymer

Answer 277

Synthetic polymer

Answer 278

Cross linked or inter connected polymer

Answer 279

Chlorination

Answer 280

Coagulation

Answer 281

Self-oxidation reduction

Answer 282

4 – 8 ppm

Answer 283

Greater than 8 ppm

Answer 284

Greater than 4 ppm

Answer 285

Less than 4 ppm

Answer 286

Carbon dioxide

Answer 287

Carbon monoxide

Answer 288

Sulphur dioxide

Answer 289

Neutrality

Answer 290

Buffer action

Answer 291

Alkalinity

Answer 292

Carbon dioxide

Answer 293

Sulphure dioxide

Answer 294

Carbon dioxide

Answer 295

Nitrogen oxides and chloro fluorocarbon

Answer 296

Ionosphere

Answer 297

Troposphere

Answer 298

None of these

Answer 299

Stratosphere

Answer 300

Web structure is consolidated

Answer 301

It dry the paper

Answer 302

It discharge the pulp at the screen of Fourdriner table

Answer 303

It reduces the thickness of paper

Answer 304

Hardness of water decreases

Answer 305

Cl₂ kills the pathogenic bacteria

Answer 306

Dissolved oxygen increases

Answer 307

pH of water is controlled

Answer 308

Oil spill in water

Answer 309

Organic waste into drinking water

Answer 310

Industrial waste containing mercury into fishing water

Answer 311

Arsenic into the atmosphere

Answer 312

Carbon monoxide

Answer 313

Carbon dioxide

Answer 314

250 to 500°C

Answer 315

500 to 900°C

Answer 316

950 to 1300+C

Answer 317

900 to 1000°C

Answer 318

Polyhalogens

Answer 319

Fullerenes

Answer 320

Can sugar field

Answer 321

Wheat field

Answer 322

Cotton field

Answer 323

Paddy field

Answer 324

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

Answer 325

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

Answer 326

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

Answer 327

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

Answer 328

Biosphere oxygen demand

Answer 329

Biological oxygen deficit

Answer 330

Biological oxygen demand

Answer 331

None of these

Answer 332

900 to 100°C

Answer 333

950 to 1300°C

Answer 334

250 to 500°C

Answer 335

500 to 900°C

Answer 336

Biotic and abiotic components of environment

Answer 337

Plants only

Answer 338

Biotic components

Answer 339

Polystyrene

Answer 340

Atomic explosions and industrial wastes

Answer 341

Balloons and turbo-prop airplanes

Answer 342

Fungicides, insecticides, bactericides and

Answer 343

Aerosols and high flying jets

Answer 344

All membrane systems

Answer 345

Plasmodesmata

Answer 346

Thermal power plant

Answer 347

Sewage treatment plant

Answer 348

All of the above

Answer 349

Solid waste disposal sites

Answer 350

Mesosphere

Answer 351

Stratosphere

Answer 352

Trophosphere

Answer 353

Thermosphere

Answer 354

Conductivity meter

Answer 355

Calorimeter

Answer 356

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

Answer 357

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

Answer 358

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

Answer 359

Troposhere is a dusty zone containing water vapor and clouds.

Answer 360

Nutrient elements

Answer 361

Trace elements

Answer 362

Basic elements

Answer 363

Microbes and organic matter

Answer 364

None of these

Answer 365

Organic matter

Answer 366

It is not easily/rapidly degraded on nature

Answer 367

It becomes ineffective after some time

Answer 368

It is less effective than others

Answer 369

Its high cost

Answer 370

None of these

Answer 371

Mineral fiber

Answer 372

Vegetable fiber

Answer 373

Animal fiber

Answer 374

Shortage of food

Answer 375

Growing population

Answer 376

Unemployment

Answer 377

Clean drinking water

Answer 378

Sulphure dioxide

Answer 379

Carbon monoxide

Answer 380

Chromium V

Answer 381

Chromium VI

Answer 382

Chromium III

Answer 383

Chromium IV

Answer 384

Leather tanning

Answer 385

Cement industry

Answer 386

Water purification

Answer 387

Fertilizer industry

Answer 388

None of these

Answer 389

Forest fires

Answer 390

Global warming

Answer 391

Increased incidence of skin cancer

Answer 392

Urbanization

Answer 393

Industrialization

Answer 394

Rapid growth of population

Answer 395

Increase of plantation

Answer 396

Air, water and soil

Answer 397

Air and water

Answer 398

Air and soil

Answer 399

Temperature mediated spoilage of marble

Answer 400

Air pollutants from Lahore chemical industries

Answer 401

Flood in Ravi

Answer 402

All of these

Answer 403

Allotropes

Answer 404

Thermoplastics

Answer 405

Elastomers

Answer 406

Thermosetting polymers

Answer 407

Increase of concentration of O₃ in tropical region

Answer 408

Formation of a complex of O₃ with hydrocarbons

Answer 409

Depletion in total amount of O₃ in particular region

Answer 410

Decomposition of O₂ to O₃ in sunlight

Answer 411

Sulphure dioxide

Answer 412

Nitrogen peroxide

Answer 413

Are very inflammable

Answer 414

Decompose to produce toxic products

Answer 415

Are made from petroleum

Answer 416

Burn to produce toxic fumes

Answer 417

Maleic acid

Answer 418

Acetic acid

Answer 419

Phthalic acid

Answer 420

Malonic acid

Answer 421

Undesirable plant growth

Answer 422

Non-biodegradable foam

Answer 423

Combustion

Answer 424

Coagulation

Answer 425

Purification

Answer 426

Chlorination

Answer 427

Electrostatic precipitator

Answer 428

Cyclone separator

Answer 429

Wet scrubber

Answer 430

Fabric filter

Answer 431

Pulp is spread over fabric or screen

Answer 432

Paper is wounded in the form of reel

Answer 433

Paper thickness in reduced

Answer 434

Moisture is removed

Answer 435

Nitrons oxide and unburnt hydrocarbons

Answer 436

Nilric oxide and unburnt hydrocarbons

Answer 437

NO and burnt hydrocarbons

Answer 438

N₂O and burnt hydrocarbons

Answer 439

Automobile exhausts

Answer 440

Household waste

Answer 441

Radio-active fall out

Answer 442

Pesticide residue

Answer 443

Carbon dioxide

Answer 444

Carbon monoxide

Answer 445

Chlorofluorocarbons and nitrogen oxides

Answer 446

Sulphur oxide

Answer 447

Photochemical oxidants

Answer 448

Chlorofluorocarbon

Answer 449

Sulphur dioxide

Answer 450

Reduction of thickness of ozone in troposphere

Answer 451

Reduction in thickness of ozone layer in stratosphere

Answer 452

Increase concentration of ozone

Answer 453

Hole in ozone layers

Answer 454

Agricultural fertilizers

Answer 455

Sewage and agricultural fertilizers

Answer 456

Phosphate rocks and sewage

Answer 457

Weathering of phosphate rocks only

Answer 458

Greenhouse effect

Answer 459

UV rays reach the earth

Answer 460

Global warming

Answer 461

Carbon dioxide

Answer 462

Industrial discharges

Answer 463

Sulphure dioxide

Answer 464

Is antagonistic to CO₂

Answer 465

Is destructive to O₃

Answer 466

Is carcinogenic

Answer 467

Has higher affinity for hemoglobin as compared to oxygen

Answer 468

To help to clean the atmosphere

Answer 469

To help in fixing of bacteria

Answer 470

To help plant to undergo photosynthesis

Answer 471

To destroy nitrogen oxide from the atmosphere

Answer 472

Increased shinning

Answer 473

Harmful stress

Answer 474

Becoming dirty

Answer 475

Pesticide residue

Answer 476

Radioactive fall out

Answer 477

Automobile exhausts

Answer 478

Household waste

Answer 479

Radioactive pollution

Answer 480

Air pollution

Answer 481

Noise pollution

Answer 482

Water pollution

Answer 483

Troposphere

Answer 484

Mesosphere

Answer 485

Stratosphere

Answer 486

Thermosphere

Answer 487

Sugar cane

Answer 488

Paddy rice

Answer 489

Xanthoproteic test

Answer 490

All of these

Answer 491

Hopkins-cole

Answer 492

Non-biodegradable pollution

Answer 493

Air pollution

Answer 494

Biodegradable pollution

Answer 495

Highly acidic

Answer 496

Oil spills in H₂O

Answer 497

Industrial waste Having Hg

Answer 498

Organic waste in drinking H₂O

Answer 499

Arsenic (As) into atmosphere

Answer 500

Polystyrene

Answer 501

Polyurethane

Total Questions:	201
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Total Marks:	201
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