Environmental Chemistry Online Mcqs Test

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Question 1

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

Answer

Greater than 4 ppm

Answer

Less than 4 ppm

Answer

4 – 8 ppm

Answer

Greater than 8 ppm

Question 2

2. 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 3

3. 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

Linear polymer

Answer

Synthetic polymer

Question 4

4. In fructose the possible optical isomers are

Question 5

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

Answer

Pressed to remove moisture

Answer

Pulp is dispersed in water and slurry is obtained

Answer

Mechanical beating of fibers

Answer

Addition of chemical additives

Question 6

6. Of the following a step growth polymer

Answer

Polyethylene

Question 7

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

Answer

Xanthoproteic test

Answer

Hopkins-cole

Answer

All of these

Question 8

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

Question 9

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

Answer

Chromium (III)

Answer

Chromium (VI)

Question 10

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

Answer

Dichromate ion (Cr₂O₇²¯)

Answer

Sulphate ion (SO₄²¯)

Answer

Chromate ion (CrO₄²¯)

Answer

Permanganate ion (MnO₄)

Question 11

11. Which of the following is fully fluorinated polymer?

Question 12

12. Biodegradable pollutant is

Question 13

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

Question 14

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

Question 15

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

Answer

Ozone and dust

Answer

SO₃ and CO

Answer

CO₂ and CO

Answer

SO₂ and NO₂

Question 16

16. Carbon monoxide is harmful to human beings as it

Answer

Is antagonistic to CO₂

Answer

Is destructive to O₃

Answer

Is carcinogenic

Answer

Has higher affinity for hemoglobin as compared to oxygen

Question 17

17. Chlorofluorocarbon releases a chemical harmful to ozone

Answer

Nitrogen peroxide

Answer

Sulphure dioxide

Question 18

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

Answer

Terpolymer

Answer

Homopolymer

Answer

Heteropolymer

Question 19

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

Answer

Undesirable plant growth

Answer

Non-biodegradable foam

Question 20

20. 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 21

21. Which factor is helping to reduce the environmental pollution?

Answer

Rapid growth of population

Answer

Industrialization

Answer

Increase of plantation

Answer

Urbanization

Question 22

22. Potable water is considered to be

Answer

The Surface water

Answer

Safe for human consumption

Answer

The ground water

Answer

Now safe or human consumption

Question 23

23. SO₂ and NO₂ produce pollution by increasing

Answer

Alkalinity

Answer

Buffer action

Answer

Neutrality

Question 24

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

Question 25

25. The metal present in blood is

Question 26

26. Newspapers can be recycled again and again by how many times?

Question 27

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

Answer

Carbon monoxide

Answer

Chlorofluorocarbons and nitrogen oxides

Answer

Sulphur oxide

Answer

Carbon dioxide

Question 28

28. Water is often treated with chlorine to

Answer

Remove suspended particles

Answer

Increase oxygen content

Answer

Remove hardness

Answer

Kill germs

Question 29

29. Among the following polymers, the strongest molecular forces are present in

Answer

Thermosetting polymers

Answer

Elastomers

Answer

Thermoplastics

Question 30

30. Which of the following is an air pollutant?

Answer

Carbon monoxide

Answer

Carbon dioxide

Question 31

31. Ultraviolet radiation from sun causes a reaction that produces

Answer

Sulphure dioxide

Answer

Carbon monoxide

Question 32

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

Question 33

33. Environmental pollution affects

Answer

Plants only

Answer

Biotic components

Answer

Biotic and abiotic components of environment

Question 34

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

Answer

Global warming

Question 35

35. Ozone depletion in stratosphere shall result in

Answer

None of these

Answer

Forest fires

Answer

Global warming

Answer

Increased incidence of skin cancer

Question 36

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

Question 37

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

Answer

250 to 500°C

Answer

500 to 900°C

Answer

900 to 100°C

Answer

950 to 1300°C

Question 38

38. The pH range of the acid rain is

Answer

Less than 5.6

Question 39

39. Silk is an example of

Answer

Animal fiber

Answer

Vegetable fiber

Answer

None of these

Answer

Mineral fiber

Question 40

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

Answer

pH changes

Answer

Keeping pH 7.35

Answer

Oxidizing agent

Answer

Heat protein

Question 41

41. UV radiation bring about

Answer

Liver cancer

Answer

Skin cancer

Answer

Mouth cancer

Answer

Lung cancer

Question 42

42. Swage water is purified by

Answer

Microorganisms

Answer

Aquatic plants

Question 43

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

Answer

Increases sulphur contents of soil

Answer

Increases nitrogen contents of soil

Answer

Acts pesticide

Answer

Increases oxygen contents of soil

Question 44

44. Thickness of the atmosphere is

Question 45

45. Which one is the most toxie?

Question 46

46. 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 47

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

Question 48

48. Fluoride pollution mainly affects:

Question 49

49. Minamata disease is due to pollution of

Answer

Arsenic into the atmosphere

Answer

Oil spill in water

Answer

Organic waste into drinking water

Answer

Industrial waste containing mercury into fishing water

Question 50

50. SO₂ and NO₂ cause pollution due to increase in

Answer

Neutrality

Answer

Buffer action

Question 51

51. Oceans, rivers, streams, lakes, polar ice caps, glaciers and group water reservoirs are included in

Answer

Hydrosphere

Answer

Lithosphere

Answer

Atmosphere

Question 52

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

Answer

Corn straw

Answer

Eucalyptus

Question 53

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

Question 54

54. 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 C – F bond is stronger than the C – Cl bond

Answer

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

Answer

The chlorine atom is larger than the fluorine atom

Answer

Fluorine is more electronegative than chlorine

Question 55

55. Ozone hole is

Answer

Decomposition of O₂ to O₃ in sunlight

Answer

Depletion in total amount of O₃ in particular region

Answer

Increase of concentration of O₃ in tropical region

Answer

Formation of a complex of O₃ with hydrocarbons

Question 56

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

Question 57

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

Question 58

58. The prosthetic group is glycoprotein is

Answer

Nucleic acid

Answer

Carbohydrate

Question 59

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

Answer

250 to 500°C

Answer

900 to 1000°C

Answer

950 to 1300+C

Answer

500 to 900°C

Question 60

60. Eutrophication causes reduction in

Answer

All of these

Answer

Dissolved salts

Answer

Dissolved oxygen

Answer

Dissolved hydrogen

Question 61

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

Answer

Chlorine nitrate

Answer

SO₂ and SO₃

Answer

Peroxy acetyl nitrate

Question 62

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

Question 63

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

Answer

Chromium V

Answer

Chromium IV

Answer

Chromium VI

Answer

Chromium III

Question 64

64. Fresh sewage is ____________ in nature

Answer

Highly acidic

Answer 142

Carbon monoxide

Answer 143

Carbon dioxide

Answer 144

Fullerenes

Answer 145

Polyhalogens

Answer 146

Treatment with Iodine

Answer 147

Treatment with chlorine

Answer 148

Coagulation

Answer 149

Non renewable

Answer 150

Purification

Answer 151

Chlorination

Answer 152

Coagulation

Answer 153

Combustion

Answer 154

Calendar stock, flow spreader, pressing drying

Answer 155

Calendar stock, Drying, pressing, flow spreader

Answer 156

Flow spreader, pressing, drying, calendar stock

Answer 157

Flow spreader, Drying, pressing, calendar stock

Answer 158

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

Answer 159

Troposhere is a dusty zone containing water vapor and clouds.

Answer 160

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

Answer 161

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

Answer 162

Chromium (III)

Answer 163

Calcium (II)

Answer 164

Sodium (I)

Answer 165

Chromium (VI)

Answer 166

Air pollution

Answer 167

Non-biodegradable pollution

Answer 168

Biodegradable pollution

Answer 169

Remains same

Answer 170

Unpredictable

Answer 171

Hydrocarbons

Answer 172

Carbohydrates

Answer 173

Neutrality

Answer 174

Buffer action

Answer 175

Less than that of water

Answer 176

Equal to that of water

Answer 177

None of these

Answer 178

More than that of water

Answer 179

Chlorination

Answer 180

Coagulation

Answer 181

Self-oxidation reduction

Answer 182

An aerobic suspended growth biological treatment system

Answer 183

An anaerobic suspended growth treatment system

Answer 184

An aerobic attached growth treatment system

Answer 185

An anaerobic attached growth biological treatment system

Answer 186

Polystyrene

Answer 187

Polyurethane

Answer 188

Hole in ozone layers

Answer 189

Increase concentration of ozone

Answer 190

Reduction in thickness of ozone layer in stratosphere

Answer 191

Reduction of thickness of ozone in troposphere

Answer 192

Conductivity meter

Answer 193

Calorimeter

Answer 194

Primary structure

Answer 195

Secondary structure

Answer 196

Quaternary structure

Answer 197

Tertiary structure

Answer 198

Pollen grains

Answer 199

Automobiles

Answer 200

Hydroelectric power

Answer 201

Industries

Answer 202

Three dimensional twisting and folding of peptide chain

Answer 203

Hydrolysis of protein

Answer 204

Developing hydrogen bonding in peptide chain

Answer 205

Unfolding of protein

Answer 206

Carbon monoxide

Answer 207

Sulphure dioxide

Answer 208

Nitrous oxide

Answer 209

Na₂SO₃

Answer 210

Trace elements

Answer 211

Nutrient elements

Answer 212

Basic elements

Answer 213

Shortage of food

Answer 214

Growing population

Answer 215

Clean drinking water

Answer 216

Unemployment

Answer 217

Adipic acid

Answer 218

All of these

Answer 219

A combination of smoke and fog

Answer 220

A natural phenomenon

Answer 221

Is colourless

Answer 222

C₁₈H₃₆O₁₈

Answer 223

C₃H₆O₃

Answer 224

C₁₈H₃₂O₁₆

Answer 225

C₃H₃O₃

Answer 226

Radioactive pollution

Answer 227

Noise pollution

Answer 228

Water pollution

Answer 229

Air pollution

Answer 230

Glucose and maltose

Answer 231

Glucose and fructose

Answer 232

Fructose and maltose

Answer 233

Fructose and lactose

Answer 234

Conversion of monomer to monomer ions by protons

Answer 235

Coordination reaction between monomers

Answer 236

Condensation reaction between monomers

Answer 237

Hydrolysis of monomers

Answer 238

Excess NO₂ and SO₂ from burning fossil fuels

Answer 239

Excess production of NH₃ by industry and coal gas

Answer 240

Excess formation of CO₂ by combustion and animal respiration

Answer 241

Excess release of carbon monoxide by incomplete combustion

Answer 242

Polyethene

Answer 243

Polyvinyl chloride

Answer 244

Biochemical oxygen demand

Answer 245

A measure of the organic matter presents in water

Answer 246

Usually less than COD

Answer 247

All of these

Answer 248

CO₂ Pollution

Answer 249

Ozone depletion

Answer 250

CO pollution

Answer 251

Sulphure dioxide

Answer 252

Nitrogen oxides and chloro fluorocarbon

Answer 253

Carbon dioxide

Answer 254

Carbon dioxide

Answer 255

Industrial waste Having Hg

Answer 256

Organic waste in drinking H₂O

Answer 257

Arsenic (As) into atmosphere

Answer 258

Oil spills in H₂O

Answer 259

Agricultural fertilizers

Answer 260

Weathering of phosphate rocks only

Answer 261

Phosphate rocks and sewage

Answer 262

Sewage and agricultural fertilizers

Answer 263

Air pollution

Answer 264

Radioactive pollution

Answer 265

Water pollution

Answer 266

Noise pollution

Answer 267

Haemocyanin

Answer 268

Chlorophyll

Answer 269

Carbonic anhydrase

Answer 270

Vitamin B₁₂

Answer 271

Neutralization of soil

Answer 272

Drying of soil

Answer 273

Combustion of soil

Answer 274

Acidification of soil

Answer 275

Wet scrubber

Answer 276

Cyclone separator

Answer 277

Fabric filter

Answer 278

Electrostatic precipitator

Answer 279

Fossil fuel

Answer 280

Heat dispersion

Answer 281

None of these

Answer 282

Sugar cane

Answer 283

Paddy rice

Answer 284

Radioactive fall out

Answer 285

Automobile exhausts

Answer 286

Household waste

Answer 287

Pesticide residue

Answer 288

Carbon dioxide

Answer 289

Hydrocarbons

Answer 290

Sulphur dioxide

Answer 291

Carbon monoxide

Answer 292

Carbon monoxide

Answer 293

Carbon dioxide

Answer 294

Sulphur dioxide

Answer 295

More soluble as compared to smaller crystals

Answer 296

Assimilated in the root hairs of plants

Answer 297

Less toxic

Answer 298

Easy to spread in the field

Answer 299

Formaldehyde

Answer 300

Chlorobenzene

Answer 301

Acetaldehyde

Answer 302

Kill plants

Answer 303

Kill insects

Answer 304

Control the growth of fungus

Answer 305

Kill herbs

Answer 306

Paper is wounded in the form of reel

Answer 307

Moisture is removed

Answer 308

Paper thickness in reduced

Answer 309

Pulp is spread over fabric or screen

Answer 310

Antarctica

Answer 311

All membrane systems

Answer 312

Plasmodesmata

Answer 313

Stratosphere

Answer 314

Lithosphere

Answer 315

Hydrosphere

Answer 316

Are made from petroleum

Answer 317

Are very inflammable

Answer 318

Burn to produce toxic fumes

Answer 319

Decompose to produce toxic products

Answer 320

N₂O and burnt hydrocarbons

Answer 321

NO and burnt hydrocarbons

Answer 322

Nilric oxide and unburnt hydrocarbons

Answer 323

Nitrons oxide and unburnt hydrocarbons

Answer 324

Cotton field

Answer 325

Paddy field

Answer 326

Wheat field

Answer 327

Can sugar field

Answer 328

Both b & c

Answer 329

Polyester fiber

Answer 330

Automobile exhausts

Answer 331

2, 4-D and pesticides

Answer 332

Smoke/fly ash

Answer 333

Household waste

Answer 334

Pesticide residue

Answer 335

Radio-active fall out

Answer 336

Automobile exhausts

Answer 337

Caron dioxide

Answer 338

Chloroform

Answer 339

Oxides of nitrogen

Answer 340

Oxides of carbon

Answer 341

None of these

Answer 342

Oxides of sulphur

Answer 343

Thermal power plant

Answer 344

Sewage treatment plant

Answer 345

All of the above

Answer 346

Solid waste disposal sites

Answer 347

Forming stable compound with hemoglobin

Answer 348

Combining with oxygen to form carbon dioxide

Answer 349

Preventing reaction between oxygen and hemoglobin

Answer 350

Destruction of hemoglobin

Answer 351

Global warming

Answer 352

Greenhouse effect

Answer 353

UV rays reach the earth

Answer 354

Non-renewable

Answer 355

Primary pollutant

Answer 356

Coagulation

Answer 357

Secondary pollutant

Answer 358

Flood in Ravi

Answer 359

Air pollutants from Lahore chemical industries

Answer 360

All of these

Answer 361

Temperature mediated spoilage of marble

Answer 362

Conservation of energy

Answer 363

All the above

Answer 364

Removal of top soil

Answer 365

Release of toxic/undesirable materials in environment

Answer 366

It is not easily/rapidly degraded on nature

Answer 367

It becomes ineffective after some time

Answer 368

Its high cost

Answer 369

It is less effective than others

Answer 370

Phthalic acid

Answer 371

Maleic acid

Answer 372

Malonic acid

Answer 373

Acetic acid

Answer 374

Riboflavin

Answer 375

Ascorbic acid

Answer 376

Wet and dry environment

Answer 377

Eating of seasonal vegetables

Answer 378

Inhalation of seasonal pollen

Answer 379

Low temperature

Answer 380

None of these

Answer 381

Organic matter

Answer 382

Microbes and organic matter

Answer 383

Thermal power plant

Answer 384

Agro-industry

Answer 385

All the above

Answer 386

Sulphur dioxide

Answer 387

Photochemical oxidants

Answer 388

Chlorofluorocarbon

Answer 389

All are correct

Answer 390

Drink dilute solution of NaHCO₃

Answer 391

Drink dilute solution of CH₃COOH

Answer 392

Supply pure O₂ for breathing

Answer 393

Air and water

Answer 394

Air and soil

Answer 395

Air, water and soil

Answer 396

Chemical composition

Answer 397

Physical properties

Answer 398

Manufacturing process

Answer 399

All of these

Answer 400

Nitrogen oxide

Answer 401

Sulphur oxide

Answer 402

Non-renewable

Answer 403

Balloons and turbo-prop airplanes

Answer 404

Atomic explosions and industrial wastes

Answer 405

Aerosols and high flying jets

Answer 406

Fungicides, insecticides, bactericides and

Answer 407

500 to 900°C

Answer 408

900 to 1000°C

Answer 409

250 to 500°C

Answer 410

950 to 1300°C

Answer 411

Stratosphere

Answer 412

Troposphere

Answer 413

Mesosphere

Answer 414

Thermosphere

Answer 415

pH of water is controlled

Answer 416

Cl₂ kills the pathogenic bacteria

Answer 417

Dissolved oxygen increases

Answer 418

Hardness of water decreases

Answer 419

Non-renewable

Answer 420

It discharge the pulp at the screen of Fourdriner table

Answer 421

Web structure is consolidated

Answer 422

It reduces the thickness of paper

Answer 423

It dry the paper

Answer 424

Copper Sulphate

Answer 425

Barium Sulphate

Answer 426

Nickel Sulphate

Answer 427

Home worts

Answer 428

Epiphytic lichens

Answer 429

Liver worts

Answer 430

All are correct

Answer 431

One – CHO group

Answer 432

Four secondary alcoholic group

Answer 433

One primary alcoholic group

Answer 434

To help to clean the atmosphere

Answer 435

To help in fixing of bacteria

Answer 436

To help plant to undergo photosynthesis

Answer 437

To destroy nitrogen oxide from the atmosphere

Answer 438

Troposphere

Answer 439

None of these

Answer 440

Stratosphere

Answer 441

Ionosphere

Answer 442

Becoming dirty

Answer 443

Increased shinning

Answer 444

Harmful stress

Answer 445

2ppm – 4ppm

Answer 446

4ppm – 8ppm

Answer 447

2ppm – 3ppm

Answer 448

2ppm – 6ppm

Answer 449

Epoxy resin

Answer 450

Plastic toys

Answer 451

None of these

Answer 452

More than 1

Answer 453

None of these

Answer 454

Equal to 1

Answer 455

Less than 1

Answer 456

Biological oxygen demand

Answer 457

Biological oxygen deficit

Answer 458

None of these

Answer 459

Biosphere oxygen demand

Answer 460

Low temperature

Answer 461

High temperature

Answer 462

Excess SO₂

Answer 463

Excess NH₃

Answer 464

Allotropes

Answer 465

Mesosphere

Answer 466

Thermosphere

Answer 467

Stratosphere

Answer 468

Trophosphere

Answer 469

Nitrogen oxide

Answer 470

Nitrous oxide

Answer 471

Sulphure dioxide

Answer 472

Nitric oxide

Answer 473

Inhibits glycolysis

Answer 474

Combines with oxygen

Answer 475

Inactivates nerves

Answer 476

Combines with hemoglobin

Answer 477

Which depends on the amount of dust in air

Answer 478

Uninfluenced by occurrence of thunderstorm

Answer 479

Slightly higher than that when the thunderstorm is not there

Answer 480

Slightly lower than that of rain water without thunderstorm

Answer 481

Water purification

Answer 482

Cement industry

Answer 483

Fertilizer industry

Answer 484

Leather tanning

Answer 485

Dissolved oxygen

Answer 486

All of these

Answer 487

Industrial discharges

Answer 488

Sulphure dioxide

Answer 489

Carbon dioxide

Answer 490

Chloramines

Answer 491

Change in taste and odour

Answer 492

Blue baby syndrome

Answer 493

Intestinal irritation

Answer 494

Sewage treatment plants

Answer 495

All of these

Answer 496

Urban and suburban lands

Answer 497

Polystyrene

Answer 498

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

Answer 499

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

Answer 500

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

Answer 501

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

Total Questions:	201
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Total Marks:	201
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