Environmental Chemistry Online Mcqs Test

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Question 1

1. How much percentage of total water is available as fresh water?

Question 2

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

Answer

Paddy rice

Answer

Sugar cane

Question 3

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

Answer

Sulphur dioxide

Answer

Carbon monoxide

Answer

Carbon dioxide

Question 4

4. Two vitamins absorbed from intestine along with fats are

Question 5

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

Answer

Chlorination

Answer

Coagulation

Answer

Self-oxidation reduction

Question 6

6. Cyclone collector is used to reduce

Answer

Radioactive pollution

Answer

Water pollution

Answer

Air pollution

Answer

Noise pollution

Question 7

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

Answer

Increased shinning

Answer

Becoming dirty

Answer

Harmful stress

Question 8

8. Depletion of ozone layer is due to

Answer

None of these

Answer

Oxides of carbon

Answer

Oxides of sulphur

Answer

Oxides of nitrogen

Question 9

9. Water is often treated with chlorine to

Answer

Increase oxygen content

Answer

Remove hardness

Answer

Kill germs

Answer

Remove suspended particles

Question 10

10. Ozone hole refers to

Answer

Hole in ozone layers

Answer

Reduction in thickness of ozone layer in stratosphere

Answer

Increase concentration of ozone

Answer

Reduction of thickness of ozone in troposphere

Question 11

11. Which of the following is fully fluorinated polymer?

Question 12

12. Thickness of the atmosphere is

Question 13

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

Question 14

14. Glyptal polymer is obtained from glycerol on reacting with

Answer

Maleic acid

Answer

Malonic acid

Answer

Acetic acid

Answer

Phthalic acid

Question 15

15. Carbon monoxide, emitted by automobiles, prevents transport of oxygen in body due to

Answer

Preventing reaction between oxygen and hemoglobin

Answer

Forming stable compound with hemoglobin

Answer

Combining with oxygen to form carbon dioxide

Answer

Destruction of hemoglobin

Question 16

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

Question 17

17. 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

Supply pure O₂ for breathing

Answer

All are correct

Answer

Drink dilute solution of NaHCO₃

Question 18

18. Which of the following is a biodegradable polymer?

Answer

Polyvinyl chloride

Answer

Polyethene

Question 19

19. Which substance is used as filler or additive in papermaking?

Question 20

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

Question 21

21. Ultraviolet radiation from sun causes a reaction that produces

Answer

Carbon monoxide

Answer

Sulphure dioxide

Question 22

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

Answer

Elastomers

Answer

Thermosetting polymers

Answer

Thermoplastics

Question 23

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

Question 24

24. Sulphure dioxide affects

Answer

All membrane systems

Answer

Plasmodesmata

Question 25

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

Question 26

26. On hydrolysis sucrose gives

Answer

Glucose and fructose

Answer

Glucose and maltose

Answer

Fructose and lactose

Answer

Fructose and maltose

Question 27

27. Which causes water pollution?

Answer

2, 4-D and pesticides

Answer

Automobile exhausts

Answer

Smoke/fly ash

Question 28

28. Ozone depletion in stratosphere shall result in

Answer

Global warming

Answer

Increased incidence of skin cancer

Answer

Forest fires

Answer

None of these

Question 29

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

Answer

Non renewable

Question 30

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

Answer

Neutrality

Answer

Buffer action

Question 31

31. Chlorofluorocarbon releases a chemical harmful to ozone

Answer

Nitrogen peroxide

Answer

Sulphure dioxide

Question 32

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

Answer

950 to 1300°C

Answer

500 to 900°C

Answer

900 to 100°C

Answer

250 to 500°C

Question 33

33. Photochemical smog is caused by

Question 34

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

Question 35

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

Answer

Remains same

Answer

Unpredictable

Question 36

36. Vegetables oils are

Answer

Essential oils obtained from plants

Answer

Glycerides of unsaturated fatty acids

Answer

Unsaturated fatty acids

Answer

Glycerides of saturated fatty acids

Question 37

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

Answer

Stratosphere

Answer

Thermosphere

Answer

Mesosphere

Answer

Troposphere

Question 38

38. In human liver, which substance cause cancer

Answer

Caron dioxide

Answer

Chloroform

Question 39

39. Which of the following are likely to be present in photochemical smog?

Answer

Photochemical oxidants

Answer

Chlorofluorocarbon

Answer

Sulphur dioxide

Question 40

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

Answer

Atmosphere

Answer

Lithosphere

Answer

Hydrosphere

Question 41

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

Answer

Eucalyptus

Answer

Corn straw

Question 42

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

Answer

Home worts

Answer

Epiphytic lichens

Answer

Liver worts

Question 43

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

Answer

Both b & c

Question 44

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

Answer

Calendar stock, flow spreader, pressing drying

Answer

Calendar stock, Drying, pressing, flow spreader

Answer

Flow spreader, pressing, drying, calendar stock

Answer

Flow spreader, Drying, pressing, calendar stock

Question 45

45. Fresh sewage is ____________ in nature

Answer

Highly acidic

Question 46

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

Answer

Polyurethane

Answer

Polystyrene

Question 47

47. The combination of smoke and fog is called

Answer

Coagulation

Answer

Primary pollutant

Answer

Secondary pollutant

Question 48

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

Question 49

49. UV radiation bring about

Answer

Liver cancer

Answer

Skin cancer

Answer

Lung cancer

Answer

Mouth cancer

Question 50

50. Fungicides are the pesticides which

Answer

Kill herbs

Answer

Kill plants

Answer

Kill insects

Answer

Control the growth of fungus

Question 51

51. Result of ozone hole is

Answer

Global warming

Answer

Greenhouse effect

Answer

UV rays reach the earth

Question 52

52. Chief source of water and soil pollution is

Answer

Agro-industry

Answer

All the above

Answer

Thermal power plant

Question 53

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

Answer

Chromium (VI)

Answer

Chromium (III)

Question 54

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

Answer

Heteropolymer

Answer

Terpolymer

Answer

Homopolymer

Question 55

55. Fluoride pollution mainly affects:

Question 56

56. Shahi Qilla may be destroyed by

Answer

Air pollutants from Lahore chemical industries

Answer

All of these

Answer

Temperature mediated spoilage of marble

Answer

Flood in Ravi

Question 57

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

Answer

Non-biodegradable foam

Answer

Undesirable plant growth

Question 58

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

Answer

Aerosols and high flying jets

Answer

Atomic explosions and industrial wastes

Answer

Fungicides, insecticides, bactericides and

Answer

Balloons and turbo-prop airplanes

Question 59

59. Ozone hole is maximum over

Answer

Antarctica

Question 60

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

Answer

Chromate ion (CrO₄²¯)

Answer

Sulphate ion (SO₄²¯)

Answer

Dichromate ion (Cr₂O₇²¯)

Answer

Permanganate ion (MnO₄)

Question 61

61. Drawback DDT as pesticide is

Answer

Its high cost

Answer

It is less effective than others

Answer

It becomes ineffective after some time

Answer

It is not easily/rapidly degraded on nature

Question 62

62. Cyclone collector is used for minimizing

Answer

Noise pollution

Answer

Water pollution

Answer

Air pollution

Answer

Radioactive pollution

Question 63

63. Swage water is purified by

Answer

Microorganisms

Answer

Aquatic plants

Question 64

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

Answer

Chloramines

Answer 148

Allotropes

Answer 149

Conductivity meter

Answer 150

Calorimeter

Answer 151

Industrial discharges

Answer 152

Carbon dioxide

Answer 153

Sulphure dioxide

Answer 154

Low temperature

Answer 155

Excess SO₂

Answer 156

Excess NH₃

Answer 157

High temperature

Answer 158

Chlorophyll

Answer 159

Haemocyanin

Answer 160

Vitamin B₁₂

Answer 161

Carbonic anhydrase

Answer 162

None of these

Answer 163

Epoxy resin

Answer 164

Plastic toys

Answer 165

None of these

Answer 166

More than 1

Answer 167

Equal to 1

Answer 168

Less than 1

Answer 169

Combines with oxygen

Answer 170

Inhibits glycolysis

Answer 171

Inactivates nerves

Answer 172

Combines with hemoglobin

Answer 173

Fertilizer industry

Answer 174

Leather tanning

Answer 175

Water purification

Answer 176

Cement industry

Answer 177

Biodegradable pollution

Answer 178

Non-biodegradable pollution

Answer 179

Air pollution

Answer 180

Keeping pH 7.35

Answer 181

Heat protein

Answer 182

pH changes

Answer 183

Oxidizing agent

Answer 184

Polyester fiber

Answer 185

Industrial waste containing mercury into fishing water

Answer 186

Organic waste into drinking water

Answer 187

Arsenic into the atmosphere

Answer 188

Oil spill in water

Answer 189

Buffer action

Answer 190

Neutrality

Answer 191

Alkalinity

Answer 192

Coagulation

Answer 193

Chlorination

Answer 194

Purification

Answer 195

Combustion

Answer 196

Usually less than COD

Answer 197

Biochemical oxygen demand

Answer 198

A measure of the organic matter presents in water

Answer 199

All of these

Answer 200

Nitrogen oxide

Answer 201

Nitric oxide

Answer 202

Nitrous oxide

Answer 203

Sulphure dioxide

Answer 204

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

Answer 205

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

Answer 206

Fluorine is more electronegative than chlorine

Answer 207

The chlorine atom is larger than the fluorine atom

Answer 208

Thermosphere

Answer 209

Trophosphere

Answer 210

Mesosphere

Answer 211

Stratosphere

Answer 212

Organic waste in drinking H₂O

Answer 213

Industrial waste Having Hg

Answer 214

Oil spills in H₂O

Answer 215

Arsenic (As) into atmosphere

Answer 216

Growing population

Answer 217

Unemployment

Answer 218

Clean drinking water

Answer 219

Shortage of food

Answer 220

Ozone and dust

Answer 221

SO₂ and NO₂

Answer 222

SO₃ and CO

Answer 223

CO₂ and CO

Answer 224

Treatment with chlorine

Answer 225

Coagulation

Answer 226

Treatment with Iodine

Answer 227

Developing hydrogen bonding in peptide chain

Answer 228

Three dimensional twisting and folding of peptide chain

Answer 229

Unfolding of protein

Answer 230

Hydrolysis of protein

Answer 231

Blue baby syndrome

Answer 232

Change in taste and odour

Answer 233

Intestinal irritation

Answer 234

Chlorofluorocarbons and nitrogen oxides

Answer 235

Carbon monoxide

Answer 236

Carbon dioxide

Answer 237

Sulphur oxide

Answer 238

Na₂SO₃

Answer 239

NO and burnt hydrocarbons

Answer 240

N₂O and burnt hydrocarbons

Answer 241

Nilric oxide and unburnt hydrocarbons

Answer 242

Nitrons oxide and unburnt hydrocarbons

Answer 243

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

Answer 244

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

Answer 245

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

Answer 246

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

Answer 247

Livestock waste

Answer 248

Oil leaks and spills

Answer 249

Disposal of industrial effluents

Answer 250

Inhalation of seasonal pollen

Answer 251

Wet and dry environment

Answer 252

Low temperature

Answer 253

Eating of seasonal vegetables

Answer 254

Non-renewable

Answer 255

4ppm – 8ppm

Answer 256

2ppm – 6ppm

Answer 257

2ppm – 4ppm

Answer 258

2ppm – 3ppm

Answer 259

Nitrogen oxide

Answer 260

Sulphur oxide

Answer 261

Synthetic polymer

Answer 262

Cross linked or inter connected polymer

Answer 263

Linear polymer

Answer 264

Acidification of soil

Answer 265

Combustion of soil

Answer 266

Neutralization of soil

Answer 267

Drying of soil

Answer 268

Buffer action

Answer 269

Neutrality

Answer 270

Excess production of NH₃ by industry and coal gas

Answer 271

Excess formation of CO₂ by combustion and animal respiration

Answer 272

Excess NO₂ and SO₂ from burning fossil fuels

Answer 273

Excess release of carbon monoxide by incomplete combustion

Answer 274

Mineral fiber

Answer 275

Vegetable fiber

Answer 276

None of these

Answer 277

Animal fiber

Answer 278

Nickel Sulphate

Answer 279

Copper Sulphate

Answer 280

Barium Sulphate

Answer 281

Pesticide residue

Answer 282

Automobile exhausts

Answer 283

Household waste

Answer 284

Radio-active fall out

Answer 285

Non-renewable

Answer 286

Global warming

Answer 287

Wet scrubber

Answer 288

Cyclone separator

Answer 289

Electrostatic precipitator

Answer 290

Fabric filter

Answer 291

Adipic acid

Answer 292

All of these

Answer 293

Dissolved oxygen

Answer 294

Dissolved salts

Answer 295

Dissolved hydrogen

Answer 296

Increase of concentration of O₃ in tropical region

Answer 297

Depletion in total amount of O₃ in particular region

Answer 298

Decomposition of O₂ to O₃ in sunlight

Answer 299

Formation of a complex of O₃ with hydrocarbons

Answer 300

250 to 500°C

Answer 301

500 to 900°C

Answer 302

900 to 1000°C

Answer 303

950 to 1300+C

Answer 304

To help plant to undergo photosynthesis

Answer 305

To help to clean the atmosphere

Answer 306

To help in fixing of bacteria

Answer 307

To destroy nitrogen oxide from the atmosphere

Answer 308

Dissolved oxygen increases

Answer 309

Hardness of water decreases

Answer 310

pH of water is controlled

Answer 311

Cl₂ kills the pathogenic bacteria

Answer 312

Fullerenes

Answer 313

Polyhalogens

Answer 314

Solid waste disposal sites

Answer 315

All of the above

Answer 316

Sewage treatment plant

Answer 317

Thermal power plant

Answer 318

4 – 8 ppm

Answer 319

Greater than 8 ppm

Answer 320

Less than 4 ppm

Answer 321

Greater than 4 ppm

Answer 322

Polyethylene

Answer 323

Ascorbic acid

Answer 324

Riboflavin

Answer 325

Carbon monoxide

Answer 326

Carbon dioxide

Answer 327

All of these

Answer 328

Dissolved oxygen

Answer 329

Carbon monoxide

Answer 330

Carbon dioxide

Answer 331

Both are polysaccharides

Answer 332

Cellulose is greater in amount on earth as compared to starch

Answer 333

Both are formed by same type of monomers

Answer 334

Both can be found in living things

Answer 335

Nucleic acid

Answer 336

Carbohydrate

Answer 337

Microbes and organic matter

Answer 338

None of these

Answer 339

Organic matter

Answer 340

Web structure is consolidated

Answer 341

It dry the paper

Answer 342

It discharge the pulp at the screen of Fourdriner table

Answer 343

It reduces the thickness of paper

Answer 344

Has higher affinity for hemoglobin as compared to oxygen

Answer 345

Is carcinogenic

Answer 346

Is destructive to O₃

Answer 347

Is antagonistic to CO₂

Answer 348

Air, water and soil

Answer 349

Air and water

Answer 350

Air and soil

Answer 351

Uninfluenced by occurrence of thunderstorm

Answer 352

Which depends on the amount of dust in air

Answer 353

Slightly higher than that when the thunderstorm is not there

Answer 354

Slightly lower than that of rain water without thunderstorm

Answer 355

Conservation of energy

Answer 356

Release of toxic/undesirable materials in environment

Answer 357

All the above

Answer 358

Removal of top soil

Answer 359

A combination of smoke and fog

Answer 360

Is colourless

Answer 361

All of these

Answer 362

A natural phenomenon

Answer 363

Pulp is dispersed in water and slurry is obtained

Answer 364

Mechanical beating of fibers

Answer 365

Pressed to remove moisture

Answer 366

Addition of chemical additives

Answer 367

Polystyrene

Answer 368

Basic elements

Answer 369

Trace elements

Answer 370

Nutrient elements

Answer 371

Carbon monoxide

Answer 372

Sulphure dioxide

Answer 373

Nitrous oxide

Answer 374

Wheat field

Answer 375

Paddy field

Answer 376

Cotton field

Answer 377

Can sugar field

Answer 378

Biotic and abiotic components of environment

Answer 379

Plants only

Answer 380

Biotic components

Answer 381

Non-renewable

Answer 382

Biological oxygen deficit

Answer 383

None of these

Answer 384

Biosphere oxygen demand

Answer 385

Biological oxygen demand

Answer 386

Carbon monoxide

Answer 387

Hydrocarbons

Answer 388

Sulphur dioxide

Answer 389

Carbon dioxide

Answer 390

Condensation reaction between monomers

Answer 391

Coordination reaction between monomers

Answer 392

Conversion of monomer to monomer ions by protons

Answer 393

Hydrolysis of monomers

Answer 394

500 to 900°C

Answer 395

950 to 1300°C

Answer 396

900 to 1000°C

Answer 397

250 to 500°C

Answer 398

Decompose to produce toxic products

Answer 399

Are very inflammable

Answer 400

Burn to produce toxic fumes

Answer 401

Are made from petroleum

Answer 402

Automobile exhausts

Answer 403

Household waste

Answer 404

Radioactive fall out

Answer 405

Pesticide residue

Answer 406

Hydroelectric power

Answer 407

Pollen grains

Answer 408

Automobiles

Answer 409

Industries

Answer 410

Pulp is spread over fabric or screen

Answer 411

Paper is wounded in the form of reel

Answer 412

Paper thickness in reduced

Answer 413

Moisture is removed

Answer 414

Less than 5.6

Answer 415

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

Answer 416

Troposhere is a dusty zone containing water vapor and clouds.

Answer 417

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

Answer 418

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

Answer 419

Carbohydrates

Answer 420

Hydrocarbons

Answer 421

Peroxy acetyl nitrate

Answer 422

SO₂ and SO₃

Answer 423

Chlorine nitrate

Answer 424

CO₂ Pollution

Answer 425

Ozone depletion

Answer 426

CO pollution

Answer 427

Rapid growth of population

Answer 428

Industrialization

Answer 429

Urbanization

Answer 430

Increase of plantation

Answer 431

Increases sulphur contents of soil

Answer 432

Increases oxygen contents of soil

Answer 433

Increases nitrogen contents of soil

Answer 434

Acts pesticide

Answer 435

Stratosphere

Answer 436

Lithosphere

Answer 437

Hydrosphere

Answer 438

An anaerobic attached growth biological treatment system

Answer 439

An aerobic suspended growth biological treatment system

Answer 440

An aerobic attached growth treatment system

Answer 441

An anaerobic suspended growth treatment system

Answer 442

Sulphure dioxide

Answer 443

Carbon dioxide

Answer 444

Nitrogen oxides and chloro fluorocarbon

Answer 445

Carbon dioxide

Answer 446

Troposphere

Answer 447

Ionosphere

Answer 448

None of these

Answer 449

Stratosphere

Answer 450

Quaternary structure

Answer 451

Tertiary structure

Answer 452

Primary structure

Answer 453

Secondary structure

Answer 454

Chromium IV

Answer 455

Chromium III

Answer 456

Chromium VI

Answer 457

Chromium V

Answer 458

Sewage treatment plants

Answer 459

Urban and suburban lands

Answer 460

All of these

Answer 461

Assimilated in the root hairs of plants

Answer 462

More soluble as compared to smaller crystals

Answer 463

Easy to spread in the field

Answer 464

Less toxic

Answer 465

Manufacturing process

Answer 466

Chemical composition

Answer 467

Physical properties

Answer 468

All of these

Answer 469

The Surface water

Answer 470

Safe for human consumption

Answer 471

The ground water

Answer 472

Now safe or human consumption

Answer 473

Four secondary alcoholic group

Answer 474

One primary alcoholic group

Answer 475

One – CHO group

Answer 476

All are correct

Answer 477

Weathering of phosphate rocks only

Answer 478

Phosphate rocks and sewage

Answer 479

Sewage and agricultural fertilizers

Answer 480

Agricultural fertilizers

Answer 481

Calcium (II)

Answer 482

Sodium (I)

Answer 483

Chromium (III)

Answer 484

Chromium (VI)

Answer 485

Heat dispersion

Answer 486

None of these

Answer 487

Fossil fuel

Answer 488

Hopkins-cole

Answer 489

Xanthoproteic test

Answer 490

All of these

Answer 491

C₁₈H₃₂O₁₆

Answer 492

C₃H₆O₃

Answer 493

C₃H₃O₃

Answer 494

C₁₈H₃₆O₁₈

Answer 495

None of these

Answer 496

Equal to that of water

Answer 497

More than that of water

Answer 498

Less than that of water

Answer 499

Acetaldehyde

Answer 500

Chlorobenzene

Answer 501

Formaldehyde

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