Environmental Chemistry Online Mcqs Test

Q: How can I prepare for Environmental Chemistry Online Mcqs Test?

You can prepare for Environmental Chemistry Online Mcqs Test by attempting the free online quizzes at Gotest.com.pk. We provide instant results, performance reports, and detailed explanations for every question.

Question 1

1. Burning of fossil is the main source of pollution

Answer

Sulphure dioxide

Answer

Nitrous oxide

Answer

Nitric oxide

Answer

Nitrogen oxide

Question 2

2. Which substance is used to bleach the pulp?

Answer

Na₂SO₃

Question 3

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

Answer

Basic elements

Answer

Nutrient elements

Answer

Trace elements

Question 4

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

Question 5

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

Question 6

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

Answer

Thermosetting polymers

Answer

Elastomers

Answer

Thermoplastics

Question 7

7. Excess fluoride in drinking water is likely to cause:

Answer

Change in taste and odour

Answer

Intestinal irritation

Answer

Blue baby syndrome

Question 8

8. 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

Cellulose is greater in amount on earth as compared to starch

Answer

Both are polysaccharides

Question 9

9. Drained sewage has B.OD.

Answer

Less than that of water

Answer

More than that of water

Answer

Equal to that of water

Answer

None of these

Question 10

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

Question 11

11. Cyclone collector is used to reduce

Answer

Noise pollution

Answer

Air pollution

Answer

Radioactive pollution

Answer

Water pollution

Question 12

12. Of the following a step growth polymer

Answer

Polyethylene

Question 13

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

Answer

Wheat field

Answer

Can sugar field

Answer

Paddy field

Answer

Cotton field

Question 14

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

Answer

All of these

Answer

Dissolved oxygen

Question 15

15. Denaturing of protein is:

Answer

Hydrolysis of protein

Answer

Unfolding of protein

Answer

Three dimensional twisting and folding of peptide chain

Answer

Developing hydrogen bonding in peptide chain

Question 16

16. Which of the following has ester linkage?

Question 17

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

Question 18

18. Silk is an example of

Answer

Animal fiber

Answer

Mineral fiber

Answer

Vegetable fiber

Answer

None of these

Question 19

19. Pollutant of automobile exhausts that affects nervous system/produces mental diseases is

Answer

Sulphur oxide

Answer

Nitrogen oxide

Question 20

20. SO₂ and NO₂ cause pollution due to increase in

Answer

Buffer action

Answer

Neutrality

Question 21

21. Shahi Qilla may be destroyed by

Answer

Air pollutants from Lahore chemical industries

Answer

Flood in Ravi

Answer

All of these

Answer

Temperature mediated spoilage of marble

Question 22

22. Environmental pollution affects

Answer

Biotic components

Answer

Plants only

Answer

Biotic and abiotic components of environment

Question 23

23. 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

All are correct

Answer

Supply pure O₂ for breathing

Answer

Drink dilute solution of NaHCO₃

Question 24

24. 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 25

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

Answer

Non-renewable

Question 26

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

Answer

Flow spreader, Drying, pressing, calendar stock

Answer

Calendar stock, Drying, pressing, flow spreader

Answer

Flow spreader, pressing, drying, calendar stock

Answer

Calendar stock, flow spreader, pressing drying

Question 27

27. Most hazardous metal pollutant of automobile exhaust is:

Question 28

28. All fats are

Answer

Hydrocarbons

Answer

Carbohydrates

Question 29

29. In fructose the possible optical isomers are

Question 30

30. Calendar stock is process in paper making in which

Answer

Moisture is removed

Answer

Paper is wounded in the form of reel

Answer

Paper thickness in reduced

Answer

Pulp is spread over fabric or screen

Question 31

31. Glucose contains

Answer

All are correct

Answer

One – CHO group

Answer

One primary alcoholic group

Answer

Four secondary alcoholic group

Question 32

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

Answer

Chloramines

Question 33

33. Plastics are a pollution problem because many plastics

Answer

Decompose to produce toxic products

Answer

Are very inflammable

Answer

Burn to produce toxic fumes

Answer

Are made from petroleum

Question 34

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

Answer

Epoxy resin

Answer

Plastic toys

Answer

None of these

Question 35

35. Spraying of DDT produces pollution of

Answer

Air and soil

Answer

Air, water and soil

Answer

Air and water

Question 36

36. Eutrophication causes reduction in

Answer

Dissolved oxygen

Answer

Dissolved salts

Answer

All of these

Answer

Dissolved hydrogen

Question 37

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

Question 38

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

Answer

Atomic explosions and industrial wastes

Answer

Balloons and turbo-prop airplanes

Answer

Fungicides, insecticides, bactericides and

Answer

Aerosols and high flying jets

Question 39

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

Question 40

40. Septic tank is:

Answer

An anaerobic suspended growth treatment system

Answer

An anaerobic attached growth biological treatment system

Answer

An aerobic attached growth treatment system

Answer

An aerobic suspended growth biological treatment system

Question 41

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

Answer

Liver worts

Answer

Home worts

Answer

Epiphytic lichens

Question 42

42. Minamata disease is due to pollution of

Answer

Arsenic into the atmosphere

Answer

Industrial waste containing mercury into fishing water

Answer

Organic waste into drinking water

Answer

Oil spill in water

Question 43

43. Air pollution is not caused by

Answer

Industries

Answer

Automobiles

Answer

Pollen grains

Answer

Hydroelectric power

Question 44

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

Question 45

45. Which one of the following is a water soluble vitamin?

Answer

Ascorbic acid

Answer

Riboflavin

Question 46

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

Answer

Polyester fiber

Question 47

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

Answer

Shortage of food

Answer

Clean drinking water

Answer

Growing population

Answer

Unemployment

Question 48

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

Answer

Chromium (VI)

Answer

Chromium (III)

Question 49

49. 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 8 ppm

Answer

Greater than 4 ppm

Answer

Less than 4 ppm

Answer

4 – 8 ppm

Question 50

50. The molecular formula of a trisaccharide will be

Answer

C₁₈H₃₂O₁₆

Answer

C₁₈H₃₆O₁₈

Answer

C₃H₃O₃

Answer

C₃H₆O₃

Question 51

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

Answer

Undesirable plant growth

Answer

Non-biodegradable foam

Question 52

52. Biodegradable pollutant is

Question 53

53. Chromium (VI is used in)

Answer

Fertilizer industry

Answer

Leather tanning

Answer

Cement industry

Answer

Water purification

Question 54

54. Chlorofluorocarbon releases a chemical harmful to ozone

Answer

Nitrogen peroxide

Answer

Sulphure dioxide

Question 55

55. Which of the following is fully fluorinated polymer?

Question 56

56. Cracking of polyethene at high temperature gives

Answer

Allotropes

Question 57

57. Ozone depletion in stratosphere shall result in

Answer

Global warming

Answer

None of these

Answer

Increased incidence of skin cancer

Answer

Forest fires

Question 58

58. 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

Synthetic polymer

Answer

Linear polymer

Answer

Cross linked or inter connected polymer

Question 59

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

Answer

Non-renewable

Question 60

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

Answer

Corn straw

Answer

Eucalyptus

Question 61

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

Answer

Neutrality

Answer

Buffer action

Question 62

62. B.O.D. is connected with

Answer

None of these

Answer

Organic matter

Answer

Microbes and organic matter

Question 63

63. The pH range of the acid rain is

Answer

Less than 5.6

Question 64

64. Classical smog occurs in places of

Answer

Low temperature

Answer

Excess SO₂

Answer

High temperature

Answer

Excess NH₃

Answer 156

Web structure is consolidated

Answer 157

It reduces the thickness of paper

Answer 158

It discharge the pulp at the screen of Fourdriner table

Answer 159

It dry the paper

Answer 160

Disposal of industrial effluents

Answer 161

Livestock waste

Answer 162

Oil leaks and spills

Answer 163

Acidification of soil

Answer 164

Neutralization of soil

Answer 165

Drying of soil

Answer 166

Combustion of soil

Answer 167

Urban and suburban lands

Answer 168

All of these

Answer 169

Sewage treatment plants

Answer 170

Carbohydrate

Answer 171

Nucleic acid

Answer 172

Hydrosphere

Answer 173

Lithosphere

Answer 174

Atmosphere

Answer 175

Air pollution

Answer 176

Water pollution

Answer 177

Radioactive pollution

Answer 178

Noise pollution

Answer 179

pH changes

Answer 180

Heat protein

Answer 181

Oxidizing agent

Answer 182

Keeping pH 7.35

Answer 183

Coagulation

Answer 184

Chlorination

Answer 185

Purification

Answer 186

Combustion

Answer 187

To destroy nitrogen oxide from the atmosphere

Answer 188

To help to clean the atmosphere

Answer 189

To help in fixing of bacteria

Answer 190

To help plant to undergo photosynthesis

Answer 191

Sulphur dioxide

Answer 192

Carbon monoxide

Answer 193

Hydrocarbons

Answer 194

Carbon dioxide

Answer 195

Automobile exhausts

Answer 196

2, 4-D and pesticides

Answer 197

Smoke/fly ash

Answer 198

Oxides of sulphur

Answer 199

None of these

Answer 200

Oxides of carbon

Answer 201

Oxides of nitrogen

Answer 202

Wet and dry environment

Answer 203

Low temperature

Answer 204

Eating of seasonal vegetables

Answer 205

Inhalation of seasonal pollen

Answer 206

Lung cancer

Answer 207

Skin cancer

Answer 208

Mouth cancer

Answer 209

Liver cancer

Answer 210

All of these

Answer 211

Xanthoproteic test

Answer 212

Hopkins-cole

Answer 213

Automobile exhausts

Answer 214

Household waste

Answer 215

Radioactive fall out

Answer 216

Pesticide residue

Answer 217

Highly acidic

Answer 218

Kill plants

Answer 219

Kill insects

Answer 220

Kill herbs

Answer 221

Control the growth of fungus

Answer 222

2ppm – 3ppm

Answer 223

2ppm – 4ppm

Answer 224

2ppm – 6ppm

Answer 225

4ppm – 8ppm

Answer 226

Rapid growth of population

Answer 227

Increase of plantation

Answer 228

Urbanization

Answer 229

Industrialization

Answer 230

Agro-industry

Answer 231

All the above

Answer 232

Thermal power plant

Answer 233

Chromium III

Answer 234

Chromium V

Answer 235

Chromium VI

Answer 236

Chromium IV

Answer 237

Mesosphere

Answer 238

Trophosphere

Answer 239

Stratosphere

Answer 240

Thermosphere

Answer 241

Coagulation

Answer 242

Primary pollutant

Answer 243

Secondary pollutant

Answer 244

Non-biodegradable pollution

Answer 245

Biodegradable pollution

Answer 246

Air pollution

Answer 247

Polyethene

Answer 248

Polyvinyl chloride

Answer 249

Cyclone separator

Answer 250

Fabric filter

Answer 251

Electrostatic precipitator

Answer 252

Wet scrubber

Answer 253

Is carcinogenic

Answer 254

Is antagonistic to CO₂

Answer 255

Has higher affinity for hemoglobin as compared to oxygen

Answer 256

Is destructive to O₃

Answer 257

UV rays reach the earth

Answer 258

Global warming

Answer 259

Greenhouse effect

Answer 260

Forming stable compound with hemoglobin

Answer 261

Destruction of hemoglobin

Answer 262

Preventing reaction between oxygen and hemoglobin

Answer 263

Combining with oxygen to form carbon dioxide

Answer 264

Non-renewable

Answer 265

Secondary structure

Answer 266

Quaternary structure

Answer 267

Tertiary structure

Answer 268

Primary structure

Answer 269

Both b & c

Answer 270

Microorganisms

Answer 271

Aquatic plants

Answer 272

Chlorofluorocarbons and nitrogen oxides

Answer 273

Carbon monoxide

Answer 274

Sulphur oxide

Answer 275

Carbon dioxide

Answer 276

Adipic acid

Answer 277

None of these

Answer 278

Fossil fuel

Answer 279

Heat dispersion

Answer 280

Carbon monoxide

Answer 281

Nitrous oxide

Answer 282

Sulphure dioxide

Answer 283

Antarctica

Answer 284

CO₂ and CO

Answer 285

SO₃ and CO

Answer 286

SO₂ and NO₂

Answer 287

Ozone and dust

Answer 288

More than 1

Answer 289

None of these

Answer 290

Less than 1

Answer 291

Equal to 1

Answer 292

Less toxic

Answer 293

More soluble as compared to smaller crystals

Answer 294

Easy to spread in the field

Answer 295

Assimilated in the root hairs of plants

Answer 296

Coagulation

Answer 297

Chlorination

Answer 298

Self-oxidation reduction

Answer 299

SO₂ and SO₃

Answer 300

Chlorine nitrate

Answer 301

Peroxy acetyl nitrate

Answer 302

Unpredictable

Answer 303

Remains same

Answer 304

Nilric oxide and unburnt hydrocarbons

Answer 305

Nitrons oxide and unburnt hydrocarbons

Answer 306

NO and burnt hydrocarbons

Answer 307

N₂O and burnt hydrocarbons

Answer 308

Reduction of thickness of ozone in troposphere

Answer 309

Hole in ozone layers

Answer 310

Reduction in thickness of ozone layer in stratosphere

Answer 311

Increase concentration of ozone

Answer 312

Fullerenes

Answer 313

Polyhalogens

Answer 314

All of these

Answer 315

Usually less than COD

Answer 316

Biochemical oxygen demand

Answer 317

A measure of the organic matter presents in water

Answer 318

Photochemical oxidants

Answer 319

Chlorofluorocarbon

Answer 320

Sulphur dioxide

Answer 321

Stratosphere

Answer 322

None of these

Answer 323

Troposphere

Answer 324

Ionosphere

Answer 325

The Surface water

Answer 326

Safe for human consumption

Answer 327

Now safe or human consumption

Answer 328

The ground water

Answer 329

All membrane systems

Answer 330

Plasmodesmata

Answer 331

Removal of top soil

Answer 332

All the above

Answer 333

Release of toxic/undesirable materials in environment

Answer 334

Conservation of energy

Answer 335

Calorimeter

Answer 336

Conductivity meter

Answer 337

Buffer action

Answer 338

Neutrality

Answer 339

Alkalinity

Answer 340

Lithosphere

Answer 341

Stratosphere

Answer 342

Hydrosphere

Answer 343

Carbon dioxide

Answer 344

Carbon monoxide

Answer 345

Polystyrene

Answer 346

Carbon monoxide

Answer 347

Sulphure dioxide

Answer 348

Non renewable

Answer 349

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

Answer 350

The chlorine atom is larger than the fluorine atom

Answer 351

Fluorine is more electronegative than chlorine

Answer 352

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

Answer 353

Chlorophyll

Answer 354

Vitamin B₁₂

Answer 355

Haemocyanin

Answer 356

Carbonic anhydrase

Answer 357

pH of water is controlled

Answer 358

Hardness of water decreases

Answer 359

Cl₂ kills the pathogenic bacteria

Answer 360

Dissolved oxygen increases

Answer 361

Chloroform

Answer 362

Caron dioxide

Answer 363

Biosphere oxygen demand

Answer 364

None of these

Answer 365

Biological oxygen deficit

Answer 366

Biological oxygen demand

Answer 367

Hydrolysis of monomers

Answer 368

Condensation reaction between monomers

Answer 369

Coordination reaction between monomers

Answer 370

Conversion of monomer to monomer ions by protons

Answer 371

Formaldehyde

Answer 372

Chlorobenzene

Answer 373

Acetaldehyde

Answer 374

Thermal power plant

Answer 375

Solid waste disposal sites

Answer 376

All of the above

Answer 377

Sewage treatment plant

Answer 378

Physical properties

Answer 379

Manufacturing process

Answer 380

Chemical composition

Answer 381

All of these

Answer 382

Glycerides of saturated fatty acids

Answer 383

Essential oils obtained from plants

Answer 384

Unsaturated fatty acids

Answer 385

Glycerides of unsaturated fatty acids

Answer 386

Sulphur dioxide

Answer 387

Carbon monoxide

Answer 388

Carbon dioxide

Answer 389

Heteropolymer

Answer 390

Homopolymer

Answer 391

Terpolymer

Answer 392

Its high cost

Answer 393

It becomes ineffective after some time

Answer 394

It is less effective than others

Answer 395

It is not easily/rapidly degraded on nature

Answer 396

Coagulation

Answer 397

Treatment with Iodine

Answer 398

Treatment with chlorine

Answer 399

Excess release of carbon monoxide by incomplete combustion

Answer 400

Excess NO₂ and SO₂ from burning fossil fuels

Answer 401

Excess formation of CO₂ by combustion and animal respiration

Answer 402

Excess production of NH₃ by industry and coal gas

Answer 403

Polystyrene

Answer 404

Polyurethane

Answer 405

Carbon dioxide

Answer 406

Sulphure dioxide

Answer 407

Nitrogen oxides and chloro fluorocarbon

Answer 408

Carbon dioxide

Answer 409

Copper Sulphate

Answer 410

Barium Sulphate

Answer 411

Nickel Sulphate

Answer 412

Industrial discharges

Answer 413

Sulphure dioxide

Answer 414

Carbon dioxide

Answer 415

Acetic acid

Answer 416

Phthalic acid

Answer 417

Maleic acid

Answer 418

Malonic acid

Answer 419

Glucose and fructose

Answer 420

Fructose and lactose

Answer 421

Glucose and maltose

Answer 422

Fructose and maltose

Answer 423

Stratosphere

Answer 424

Troposphere

Answer 425

Thermosphere

Answer 426

Mesosphere

Answer 427

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

Answer 428

Troposhere is a dusty zone containing water vapor and clouds.

Answer 429

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

Answer 430

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

Answer 431

Chromium (III)

Answer 432

Chromium (VI)

Answer 433

Sodium (I)

Answer 434

Calcium (II)

Answer 435

Global warming

Answer 436

Increases oxygen contents of soil

Answer 437

Acts pesticide

Answer 438

Increases sulphur contents of soil

Answer 439

Increases nitrogen contents of soil

Answer 440

Is colourless

Answer 441

All of these

Answer 442

A natural phenomenon

Answer 443

A combination of smoke and fog

Answer 444

Oil spills in H₂O

Answer 445

Organic waste in drinking H₂O

Answer 446

Industrial waste Having Hg

Answer 447

Arsenic (As) into atmosphere

Answer 448

Phosphate rocks and sewage

Answer 449

Weathering of phosphate rocks only

Answer 450

Sewage and agricultural fertilizers

Answer 451

Agricultural fertilizers

Answer 452

Carbon dioxide

Answer 453

Carbon monoxide

Answer 454

Slightly higher than that when the thunderstorm is not there

Answer 455

Uninfluenced by occurrence of thunderstorm

Answer 456

Which depends on the amount of dust in air

Answer 457

Slightly lower than that of rain water without thunderstorm

Answer 458

Depletion in total amount of O₃ in particular region

Answer 459

Decomposition of O₂ to O₃ in sunlight

Answer 460

Formation of a complex of O₃ with hydrocarbons

Answer 461

Increase of concentration of O₃ in tropical region

Answer 462

Sugar cane

Answer 463

Paddy rice

Answer 464

950 to 1300°C

Answer 465

500 to 900°C

Answer 466

900 to 1000°C

Answer 467

250 to 500°C

Answer 468

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

Answer 469

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

Answer 470

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

Answer 471

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

Answer 472

Increased shinning

Answer 473

Becoming dirty

Answer 474

Harmful stress

Answer 475

Household waste

Answer 476

Pesticide residue

Answer 477

Radio-active fall out

Answer 478

Automobile exhausts

Answer 479

Addition of chemical additives

Answer 480

Mechanical beating of fibers

Answer 481

Pulp is dispersed in water and slurry is obtained

Answer 482

Pressed to remove moisture

Answer 483

Combines with hemoglobin

Answer 484

Inhibits glycolysis

Answer 485

Combines with oxygen

Answer 486

Inactivates nerves

Answer 487

CO pollution

Answer 488

Ozone depletion

Answer 489

CO₂ Pollution

Answer 490

Remove hardness

Answer 491

Remove suspended particles

Answer 492

Increase oxygen content

Answer 493

Kill germs

Answer 494

950 to 1300+C

Answer 495

250 to 500°C

Answer 496

500 to 900°C

Answer 497

900 to 1000°C

Answer 498

Chromate ion (CrO₄²¯)

Answer 499

Permanganate ion (MnO₄)

Answer 500

Sulphate ion (SO₄²¯)

Answer 501

Dichromate ion (Cr₂O₇²¯)

Total Questions:	201
Time Allowed:	60 Minutes
Total Marks:	201
How to Attempt Test:	Please choose the right Option in MCQ-type question.
Test Helpful For:	ECAT Entry Test Chemistry Online Test Interview Questions about Chemisttry All Universities Entrance Test Recruitments Tests

Environmental Chemistry Online Mcqs Test

Important Environmental Chemistry Question and Answer

Environmental Chemistry Practice Test Online With Explanation

How to Score High in Environmental Chemistry Online Mcqs Test?

Key Preparation Tips:

More Related Resources

Mustansar Khan

Leave a Reply Cancel reply

Important Environmental Chemistry Question and Answer

Environmental Chemistry Practice Test Online With Explanation

How to Score High in Environmental Chemistry Online Mcqs Test?

Key Preparation Tips:

More Related Resources

Latest Updates

Mustansar Khan

Leave a Reply Cancel reply