Environmental Chemistry Online Mcqs Test

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Question 1

1. B.O.D. is connected with

Answer

Organic matter

Answer

None of these

Answer

Microbes and organic matter

Question 2

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

Question 3

3. Ozone hole is

Answer

Decomposition of O₂ to O₃ in sunlight

Answer

Depletion in total amount of O₃ in particular region

Answer

Formation of a complex of O₃ with hydrocarbons

Answer

Increase of concentration of O₃ in tropical region

Question 4

4. Which of the following is responsible for depletion of the ozone layer un the upper strata of the atmosphere?

Answer

Fullerenes

Answer

Polyhalogens

Question 5

5. Colloidal material in the raw water is removed by

Answer

Coagulation

Answer

Chlorination

Answer

Purification

Answer

Combustion

Question 6

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

Answer

Non-biodegradable foam

Answer

Undesirable plant growth

Question 7

7. Shahi Qilla may be destroyed by

Answer

Temperature mediated spoilage of marble

Answer

Flood in Ravi

Answer

Air pollutants from Lahore chemical industries

Answer

All of these

Question 8

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

Answer

Peroxy acetyl nitrate

Answer

Chlorine nitrate

Answer

SO₂ and SO₃

Question 9

9. On hydrolysis sucrose gives

Answer

Fructose and lactose

Answer

Glucose and fructose

Answer

Fructose and maltose

Answer

Glucose and maltose

Question 10

10. BOD/COD ratio will always be:

Answer

None of these

Answer

Less than 1

Answer

Equal to 1

Answer

More than 1

Question 11

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

Answer

Non-renewable

Question 12

12. Fresh sewage is ____________ in nature

Answer

Highly acidic

Question 13

13. Fungicides are the pesticides which

Answer

Kill insects

Answer

Kill herbs

Answer

Kill plants

Answer

Control the growth of fungus

Question 14

14. In fructose the possible optical isomers are

Question 15

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

Answer

Increases oxygen contents of soil

Answer

Increases sulphur contents of soil

Answer

Increases nitrogen contents of soil

Answer

Acts pesticide

Question 16

16. Acid rains are produced by

Answer

Excess formation of CO₂ by combustion and animal respiration

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

Question 17

17. Chlorofluorocarbon releases a chemical harmful to ozone

Answer

Sulphure dioxide

Answer

Nitrogen peroxide

Question 18

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

Answer

Atomic explosions and industrial wastes

Answer

Balloons and turbo-prop airplanes

Answer

Aerosols and high flying jets

Answer

Fungicides, insecticides, bactericides and

Question 19

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

Answer

950 to 1300+C

Answer

500 to 900°C

Answer

250 to 500°C

Answer

900 to 1000°C

Question 20

20. The cause of Minamata disease in the pollution of

Answer

Arsenic (As) into atmosphere

Answer

Industrial waste Having Hg

Answer

Oil spills in H₂O

Answer

Organic waste in drinking H₂O

Question 21

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

Answer

Addition of chemical additives

Answer

Pressed to remove moisture

Answer

Mechanical beating of fibers

Answer

Pulp is dispersed in water and slurry is obtained

Question 22

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

Question 23

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

Question 24

24. The lowest layer of atmosphere is known as the

Answer

Stratosphere

Answer

Troposphere

Answer

Ionosphere

Answer

None of these

Question 25

25. Ultraviolet radiation from sun causes a reaction that produces

Answer

Sulphure dioxide

Answer

Carbon monoxide

Question 26

26. Septic tank is:

Answer

An anaerobic suspended growth treatment system

Answer

An anaerobic attached growth biological treatment system

Answer

An aerobic suspended growth biological treatment system

Answer

An aerobic attached growth treatment system

Question 27

27. The pH range of the acid rain is

Answer

Less than 5.6

Question 28

28. Soil salinity can be measured by

Answer

Conductivity meter

Answer

Calorimeter

Question 29

29. A condensation polymer among the following is

Answer

Polystyrene

Question 30

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

Answer

Terpolymer

Answer

Homopolymer

Answer

Heteropolymer

Question 31

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

Question 32

32. Drawback DDT as pesticide is

Answer

It is not easily/rapidly degraded on nature

Answer

It is less effective than others

Answer

Its high cost

Answer

It becomes ineffective after some time

Question 33

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

Answer

All of these

Answer

Manufacturing process

Answer

Physical properties

Answer

Chemical composition

Question 34

34. Biodegradable pollutant is

Question 35

35. Smog is:

Answer

Is colourless

Answer

A natural phenomenon

Answer

A combination of smoke and fog

Answer

All of these

Question 36

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

Question 37

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

Question 38

38. Two vitamins absorbed from intestine along with fats are

Question 39

39. Keratomalacia is caused due to the deficiency of vitamin

Question 40

40. Depletion of ozone layer is due to

Answer

Oxides of nitrogen

Answer

Oxides of sulphur

Answer

Oxides of carbon

Answer

None of these

Question 41

41. Spraying of DDT produces pollution of

Answer

Air and soil

Answer

Air, water and soil

Answer

Air and water

Question 42

42. Which of the following has ester linkage?

Question 43

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

Question 44

44. Increased asthmatic attacks in certain seasons are related to

Answer

Wet and dry environment

Answer

Low temperature

Answer

Eating of seasonal vegetables

Answer

Inhalation of seasonal pollen

Question 45

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

Question 46

46. Nutrient leach is due to

Answer

Acidification of soil

Answer

Combustion of soil

Answer

Drying of soil

Answer

Neutralization of soil

Question 47

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

Answer

Increased shinning

Answer

Harmful stress

Answer

Becoming dirty

Question 48

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

Answer

Neutrality

Answer

Buffer action

Question 49

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

Answer

Uninfluenced by occurrence of thunderstorm

Answer

Slightly lower than that of rain water without thunderstorm

Answer

Slightly higher than that when the thunderstorm is not there

Answer

Which depends on the amount of dust in air

Question 50

50. Glucose contains

Answer

One – CHO group

Answer

Four secondary alcoholic group

Answer

All are correct

Answer

One primary alcoholic group

Question 51

51. Water pollution is mainly due to

Answer

Sulphure dioxide

Answer

Carbon dioxide

Answer

Industrial discharges

Question 52

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

Question 53

53. Vegetables oils are

Answer

Essential oils obtained from plants

Answer

Glycerides of saturated fatty acids

Answer

Glycerides of unsaturated fatty acids

Answer

Unsaturated fatty acids

Question 54

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

Question 55

55. Which of the following forms a toxic substance in blood by combining with hemoglobin?

Answer

Carbon dioxide

Answer

Carbon monoxide

Question 56

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

Answer

pH changes

Answer

Oxidizing agent

Answer

Keeping pH 7.35

Answer

Heat protein

Question 57

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

Question 58

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

Answer

Both b & c

Question 59

59. Proxy acetyl nitrate (PAN) is an irritant to human beings and it affects

Question 60

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

Answer

Non-renewable

Question 61

61. Pick up the correct statement

Answer

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

Answer

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

Answer

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

Answer

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

Question 62

62. Chromium (VI is used in)

Answer

Fertilizer industry

Answer

Water purification

Answer

Cement industry

Answer

Leather tanning

Question 63

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

Answer

Chromium VI

Answer

Chromium V

Answer

Chromium IV

Answer

Chromium III

Question 64

64. Which of the following is a biodegradable polymer?

Answer

Polyvinyl chloride

Answer

Polyethene

Answer 149

Carbohydrates

Answer 150

Hydrocarbons

Answer 151

Unemployment

Answer 152

Growing population

Answer 153

Clean drinking water

Answer 154

Shortage of food

Answer 155

Liver worts

Answer 156

Epiphytic lichens

Answer 157

Home worts

Answer 158

Cotton field

Answer 159

Can sugar field

Answer 160

Wheat field

Answer 161

Paddy field

Answer 162

Sewage and agricultural fertilizers

Answer 163

Agricultural fertilizers

Answer 164

Phosphate rocks and sewage

Answer 165

Weathering of phosphate rocks only

Answer 166

Dichromate ion (Cr₂O₇²¯)

Answer 167

Sulphate ion (SO₄²¯)

Answer 168

Permanganate ion (MnO₄)

Answer 169

Chromate ion (CrO₄²¯)

Answer 170

Epoxy resin

Answer 171

None of these

Answer 172

Plastic toys

Answer 173

Vitamin B₁₂

Answer 174

Haemocyanin

Answer 175

Chlorophyll

Answer 176

Carbonic anhydrase

Answer 177

Forming stable compound with hemoglobin

Answer 178

Combining with oxygen to form carbon dioxide

Answer 179

Preventing reaction between oxygen and hemoglobin

Answer 180

Destruction of hemoglobin

Answer 181

Biosphere oxygen demand

Answer 182

None of these

Answer 183

Biological oxygen demand

Answer 184

Biological oxygen deficit

Answer 185

Cross linked or inter connected polymer

Answer 186

Linear polymer

Answer 187

Synthetic polymer

Answer 188

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

Answer 189

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

Answer 190

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

Answer 191

Troposhere is a dusty zone containing water vapor and clouds.

Answer 192

Biodegradable pollution

Answer 193

Air pollution

Answer 194

Non-biodegradable pollution

Answer 195

Plants only

Answer 196

Biotic and abiotic components of environment

Answer 197

Biotic components

Answer 198

Tertiary structure

Answer 199

Quaternary structure

Answer 200

Primary structure

Answer 201

Secondary structure

Answer 202

All of these

Answer 203

Urban and suburban lands

Answer 204

Sewage treatment plants

Answer 205

Neutrality

Answer 206

Buffer action

Answer 207

All of these

Answer 208

Dissolved oxygen

Answer 209

Adipic acid

Answer 210

Inhibits glycolysis

Answer 211

Combines with hemoglobin

Answer 212

Combines with oxygen

Answer 213

Inactivates nerves

Answer 214

Eucalyptus

Answer 215

Corn straw

Answer 216

Coordination reaction between monomers

Answer 217

Conversion of monomer to monomer ions by protons

Answer 218

Hydrolysis of monomers

Answer 219

Condensation reaction between monomers

Answer 220

250 to 500°C

Answer 221

500 to 900°C

Answer 222

950 to 1300°C

Answer 223

900 to 1000°C

Answer 224

Is carcinogenic

Answer 225

Is antagonistic to CO₂

Answer 226

Is destructive to O₃

Answer 227

Has higher affinity for hemoglobin as compared to oxygen

Answer 228

2ppm – 4ppm

Answer 229

4ppm – 8ppm

Answer 230

2ppm – 6ppm

Answer 231

2ppm – 3ppm

Answer 232

Sugar cane

Answer 233

Paddy rice

Answer 234

It dry the paper

Answer 235

It reduces the thickness of paper

Answer 236

It discharge the pulp at the screen of Fourdriner table

Answer 237

Web structure is consolidated

Answer 238

Assimilated in the root hairs of plants

Answer 239

Less toxic

Answer 240

More soluble as compared to smaller crystals

Answer 241

Easy to spread in the field

Answer 242

Polyethylene

Answer 243

Acetaldehyde

Answer 244

Chlorobenzene

Answer 245

Formaldehyde

Answer 246

Both are polysaccharides

Answer 247

Both can be found in living things

Answer 248

Both are formed by same type of monomers

Answer 249

Cellulose is greater in amount on earth as compared to starch

Answer 250

Non-renewable

Answer 251

UV rays reach the earth

Answer 252

Greenhouse effect

Answer 253

Global warming

Answer 254

Chloroform

Answer 255

Caron dioxide

Answer 256

Na₂SO₃

Answer 257

None of these

Answer 258

More than that of water

Answer 259

Equal to that of water

Answer 260

Less than that of water

Answer 261

Global warming

Answer 262

Nitrogen oxide

Answer 263

Sulphur oxide

Answer 264

950 to 1300°C

Answer 265

250 to 500°C

Answer 266

500 to 900°C

Answer 267

900 to 100°C

Answer 268

Burn to produce toxic fumes

Answer 269

Are very inflammable

Answer 270

Are made from petroleum

Answer 271

Decompose to produce toxic products

Answer 272

Nucleic acid

Answer 273

Carbohydrate

Answer 274

Intestinal irritation

Answer 275

Blue baby syndrome

Answer 276

Change in taste and odour

Answer 277

Mesosphere

Answer 278

Thermosphere

Answer 279

Stratosphere

Answer 280

Trophosphere

Answer 281

Vegetable fiber

Answer 282

Animal fiber

Answer 283

None of these

Answer 284

Mineral fiber

Answer 285

All of these

Answer 286

Biochemical oxygen demand

Answer 287

A measure of the organic matter presents in water

Answer 288

Usually less than COD

Answer 289

Carbon dioxide

Answer 290

Carbon dioxide

Answer 291

Sulphure dioxide

Answer 292

Nitrogen oxides and chloro fluorocarbon

Answer 293

Chloramines

Answer 294

Lung cancer

Answer 295

Liver cancer

Answer 296

Skin cancer

Answer 297

Mouth cancer

Answer 298

Polyurethane

Answer 299

Polystyrene

Answer 300

Carbon monoxide

Answer 301

Carbon dioxide

Answer 302

Calendar stock, Drying, pressing, flow spreader

Answer 303

Calendar stock, flow spreader, pressing drying

Answer 304

Flow spreader, pressing, drying, calendar stock

Answer 305

Flow spreader, Drying, pressing, calendar stock

Answer 306

Radioactive fall out

Answer 307

Pesticide residue

Answer 308

Automobile exhausts

Answer 309

Household waste

Answer 310

Antarctica

Answer 311

Wet scrubber

Answer 312

Electrostatic precipitator

Answer 313

Cyclone separator

Answer 314

Fabric filter

Answer 315

Coagulation

Answer 316

Self-oxidation reduction

Answer 317

Chlorination

Answer 318

Allotropes

Answer 319

Kill germs

Answer 320

Increase oxygen content

Answer 321

Remove suspended particles

Answer 322

Remove hardness

Answer 323

Barium Sulphate

Answer 324

Copper Sulphate

Answer 325

Nickel Sulphate

Answer 326

Industrial waste containing mercury into fishing water

Answer 327

Oil spill in water

Answer 328

Arsenic into the atmosphere

Answer 329

Organic waste into drinking water

Answer 330

Noise pollution

Answer 331

Air pollution

Answer 332

Radioactive pollution

Answer 333

Water pollution

Answer 334

Radio-active fall out

Answer 335

Pesticide residue

Answer 336

Household waste

Answer 337

Automobile exhausts

Answer 338

Reduction of thickness of ozone in troposphere

Answer 339

Hole in ozone layers

Answer 340

Increase concentration of ozone

Answer 341

Reduction in thickness of ozone layer in stratosphere

Answer 342

Chromium (III)

Answer 343

Chromium (VI)

Answer 344

Heat dispersion

Answer 345

None of these

Answer 346

Fossil fuel

Answer 347

Non renewable

Answer 348

Nitrons oxide and unburnt hydrocarbons

Answer 349

NO and burnt hydrocarbons

Answer 350

N₂O and burnt hydrocarbons

Answer 351

Nilric oxide and unburnt hydrocarbons

Answer 352

C₃H₃O₃

Answer 353

C₁₈H₃₂O₁₆

Answer 354

C₃H₆O₃

Answer 355

C₁₈H₃₆O₁₈

Answer 356

Thermal power plant

Answer 357

Sewage treatment plant

Answer 358

All of the above

Answer 359

Solid waste disposal sites

Answer 360

Hydrolysis of protein

Answer 361

Three dimensional twisting and folding of peptide chain

Answer 362

Unfolding of protein

Answer 363

Developing hydrogen bonding in peptide chain

Answer 364

Carbon monoxide

Answer 365

Chlorofluorocarbons and nitrogen oxides

Answer 366

Sulphur oxide

Answer 367

Carbon dioxide

Answer 368

Mesosphere

Answer 369

Troposphere

Answer 370

Thermosphere

Answer 371

Stratosphere

Answer 372

Nutrient elements

Answer 373

Basic elements

Answer 374

Trace elements

Answer 375

Unpredictable

Answer 376

Remains same

Answer 377

Forest fires

Answer 378

None of these

Answer 379

Increased incidence of skin cancer

Answer 380

Global warming

Answer 381

Nitrous oxide

Answer 382

Sulphure dioxide

Answer 383

Carbon monoxide

Answer 384

Xanthoproteic test

Answer 385

Hopkins-cole

Answer 386

All of these

Answer 387

Polyester fiber

Answer 388

The chlorine atom is larger than the fluorine atom

Answer 389

Fluorine is more electronegative than chlorine

Answer 390

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

Answer 391

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

Answer 392

Lithosphere

Answer 393

Stratosphere

Answer 394

Hydrosphere

Answer 395

Atmosphere

Answer 396

Lithosphere

Answer 397

Hydrosphere

Answer 398

Ascorbic acid

Answer 399

Riboflavin

Answer 400

The ground water

Answer 401

Safe for human consumption

Answer 402

Now safe or human consumption

Answer 403

The Surface water

Answer 404

Excess SO₂

Answer 405

Low temperature

Answer 406

High temperature

Answer 407

Excess NH₃

Answer 408

Photochemical oxidants

Answer 409

Chlorofluorocarbon

Answer 410

Sulphur dioxide

Answer 411

Carbon monoxide

Answer 412

Sulphur dioxide

Answer 413

Carbon dioxide

Answer 414

Maleic acid

Answer 415

Phthalic acid

Answer 416

Acetic acid

Answer 417

Malonic acid

Answer 418

Smoke/fly ash

Answer 419

Automobile exhausts

Answer 420

2, 4-D and pesticides

Answer 421

Drink dilute solution of NaHCO₃

Answer 422

Drink dilute solution of CH₃COOH

Answer 423

Supply pure O₂ for breathing

Answer 424

All are correct

Answer 425

To help to clean the atmosphere

Answer 426

To help plant to undergo photosynthesis

Answer 427

To help in fixing of bacteria

Answer 428

To destroy nitrogen oxide from the atmosphere

Answer 429

Dissolved oxygen

Answer 430

Dissolved hydrogen

Answer 431

All of these

Answer 432

Dissolved salts

Answer 433

All membrane systems

Answer 434

Plasmodesmata

Answer 435

4 – 8 ppm

Answer 436

Greater than 8 ppm

Answer 437

Greater than 4 ppm

Answer 438

Less than 4 ppm

Answer 439

Sulphure dioxide

Answer 440

Nitrous oxide

Answer 441

Nitrogen oxide

Answer 442

Nitric oxide

Answer 443

Treatment with Iodine

Answer 444

Coagulation

Answer 445

Treatment with chlorine

Answer 446

Sodium (I)

Answer 447

Chromium (III)

Answer 448

Calcium (II)

Answer 449

Chromium (VI)

Answer 450

Ozone and dust

Answer 451

SO₃ and CO

Answer 452

CO₂ and CO

Answer 453

SO₂ and NO₂

Answer 454

Aquatic plants

Answer 455

Microorganisms

Answer 456

CO₂ Pollution

Answer 457

Ozone depletion

Answer 458

CO pollution

Answer 459

Thermal power plant

Answer 460

Agro-industry

Answer 461

All the above

Answer 462

Secondary pollutant

Answer 463

Coagulation

Answer 464

Primary pollutant

Answer 465

Paper thickness in reduced

Answer 466

Pulp is spread over fabric or screen

Answer 467

Moisture is removed

Answer 468

Paper is wounded in the form of reel

Answer 469

Dissolved oxygen increases

Answer 470

pH of water is controlled

Answer 471

Cl₂ kills the pathogenic bacteria

Answer 472

Hardness of water decreases

Answer 473

Carbon monoxide

Answer 474

Carbon dioxide

Answer 475

Hydrocarbons

Answer 476

Sulphur dioxide

Answer 477

Water pollution

Answer 478

Air pollution

Answer 479

Noise pollution

Answer 480

Radioactive pollution

Answer 481

Release of toxic/undesirable materials in environment

Answer 482

Removal of top soil

Answer 483

All the above

Answer 484

Conservation of energy

Answer 485

Thermoplastics

Answer 486

Thermosetting polymers

Answer 487

Elastomers

Answer 488

Urbanization

Answer 489

Increase of plantation

Answer 490

Rapid growth of population

Answer 491

Industrialization

Answer 492

Automobiles

Answer 493

Hydroelectric power

Answer 494

Pollen grains

Answer 495

Industries

Answer 496

Disposal of industrial effluents

Answer 497

Livestock waste

Answer 498

Oil leaks and spills

Answer 499

Alkalinity

Answer 500

Neutrality

Answer 501

Buffer action

Total Questions:	201
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Total Marks:	201
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