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. Domestic waste mostly constitutes

Answer

Biodegradable pollution

Answer

Non-biodegradable pollution

Answer

Air pollution

Question 2

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

Answer

None of these

Answer

Plastic toys

Answer

Epoxy resin

Question 3

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

Question 4

4. 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 5

5. Cracking of polyethene at high temperature gives

Answer

Allotropes

Question 6

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

Question 7

7. 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

Fluorine is more electronegative than chlorine

Answer

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

Answer

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

Question 8

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

Answer

Can sugar field

Answer

Cotton field

Answer

Wheat field

Answer

Paddy field

Question 9

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

Answer

Chlorofluorocarbons and nitrogen oxides

Answer

Carbon monoxide

Answer

Carbon dioxide

Answer

Sulphur oxide

Question 10

10. BOD is

Answer

Biosphere oxygen demand

Answer

None of these

Answer

Biological oxygen deficit

Answer

Biological oxygen demand

Question 11

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

Question 12

12. Pick up the correct statement

Answer

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

Answer

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

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 13

13. Plastics are a pollution problem because many plastics

Answer

Are very inflammable

Answer

Decompose to produce toxic products

Answer

Burn to produce toxic fumes

Answer

Are made from petroleum

Question 14

14. The equality of raw water is improved when it is chlorinated because

Answer

pH of water is controlled

Answer

Cl₂ kills the pathogenic bacteria

Answer

Hardness of water decreases

Answer

Dissolved oxygen increases

Question 15

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

Answer

Sewage treatment plants

Answer

All of these

Answer

Urban and suburban lands

Question 16

16. Thickness of the atmosphere is

Question 17

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

Answer

Self-oxidation reduction

Answer

Coagulation

Answer

Chlorination

Question 18

18. Sulphure dioxide affects

Answer

All membrane systems

Answer

Plasmodesmata

Question 19

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

Question 20

20. Which one of the following is not a pollutant

Question 21

21. Which of the following is not an air pollutant?

Question 22

22. The pH range of the acid rain is

Answer

Less than 5.6

Question 23

23. Vegetables oils are

Answer

Unsaturated fatty acids

Answer

Glycerides of saturated fatty acids

Answer

Essential oils obtained from plants

Answer

Glycerides of unsaturated fatty acids

Question 24

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

Answer

Permanganate ion (MnO₄)

Answer

Dichromate ion (Cr₂O₇²¯)

Answer

Chromate ion (CrO₄²¯)

Answer

Sulphate ion (SO₄²¯)

Question 25

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

Answer

Paddy rice

Answer

Sugar cane

Question 26

26. SO₂ and NO₂ cause pollution due to increase in

Answer

Neutrality

Answer

Buffer action

Question 27

27. Septic tank is:

Answer

An anaerobic attached growth biological treatment system

Answer

An anaerobic suspended growth treatment system

Answer

An aerobic suspended growth biological treatment system

Answer

An aerobic attached growth treatment system

Question 28

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

Answer

250 to 500°C

Answer

900 to 100°C

Answer

950 to 1300°C

Answer

500 to 900°C

Question 29

29. Which is unnecessary for purification of water for drinking purposes?

Answer

Coagulation

Answer

Treatment with Iodine

Answer

Treatment with chlorine

Question 30

30. Glyptal polymer is obtained from glycerol on reacting with

Answer

Phthalic acid

Answer

Maleic acid

Answer

Acetic acid

Answer

Malonic acid

Question 31

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

Answer

All of these

Answer

Chemical composition

Answer

Manufacturing process

Answer

Physical properties

Question 32

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

Question 33

33. Swage water is purified by

Answer

Aquatic plants

Answer

Microorganisms

Question 34

34. Phosphate pollution is caused by

Answer

Phosphate rocks and sewage

Answer

Agricultural fertilizers

Answer

Sewage and agricultural fertilizers

Answer

Weathering of phosphate rocks only

Question 35

35. BOD/COD ratio will always be:

Answer

More than 1

Answer

Less than 1

Answer

None of these

Answer

Equal to 1

Question 36

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

Answer

Heat dispersion

Answer

Fossil fuel

Answer

None of these

Question 37

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

Answer

Fullerenes

Answer

Polyhalogens

Question 38

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

Question 39

39. Cyclone collector is used to reduce

Answer

Radioactive pollution

Answer

Water pollution

Answer

Noise pollution

Answer

Air pollution

Question 40

40. Ozone hole is maximum over

Answer

Antarctica

Question 41

41. Pollution is

Answer

Release of toxic/undesirable materials in environment

Answer

All the above

Answer

Conservation of energy

Answer

Removal of top soil

Question 42

42. Drained sewage has B.OD.

Answer

None of these

Answer

Less than that of water

Answer

More than that of water

Answer

Equal to that of water

Question 43

43. Biodegradable pollutant is

Question 44

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

Answer

Eucalyptus

Answer

Corn straw

Question 45

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

Question 46

46. Air pollution is not caused by

Answer

Pollen grains

Answer

Hydroelectric power

Answer

Automobiles

Answer

Industries

Question 47

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

Answer

Stratosphere

Answer

Mesosphere

Answer

Troposphere

Answer

Thermosphere

Question 48

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

Answer

Pressed to remove moisture

Answer

Addition of chemical additives

Answer

Mechanical beating of fibers

Answer

Pulp is dispersed in water and slurry is obtained

Question 49

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

Answer

Thermosetting polymers

Answer

Thermoplastics

Answer

Elastomers

Question 50

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

Answer

Both b & c

Question 51

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

Question 52

52. All fats are

Answer

Hydrocarbons

Answer

Carbohydrates

Question 53

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

Answer

Terpolymer

Answer

Homopolymer

Answer

Heteropolymer

Question 54

54. A condensation polymer among the following is

Answer

Polystyrene

Question 55

55. 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

Slightly higher than that when the thunderstorm is not there

Answer

Uninfluenced by occurrence of thunderstorm

Question 56

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

Answer

Non-biodegradable foam

Answer

Undesirable plant growth

Question 57

57. 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 58

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

Answer

Buffer action

Answer

Neutrality

Question 59

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

Answer

Polyester fiber

Question 60

60. Silk is an example of

Answer

None of these

Answer

Mineral fiber

Answer

Animal fiber

Answer

Vegetable fiber

Question 61

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

Answer

Oxidizing agent

Answer

Keeping pH 7.35

Answer

Heat protein

Answer

pH changes

Question 62

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

Question 63

63. A person is affected with carbon monoxide gas. How can we save him/her by adverse effect of the poisonous gas?

Answer

All are correct

Answer

Drink dilute solution of NaHCO₃

Answer

Drink dilute solution of CH₃COOH

Answer

Supply pure O₂ for breathing

Question 64

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

Answer 155

Pesticide residue

Answer 156

Radioactive fall out

Answer 157

Household waste

Answer 158

Automobile exhausts

Answer 159

Global warming

Answer 160

Greenhouse effect

Answer 161

UV rays reach the earth

Answer 162

Na₂SO₃

Answer 163

Non renewable

Answer 164

Carbon monoxide

Answer 165

Sulphur dioxide

Answer 166

Carbon dioxide

Answer 167

Primary structure

Answer 168

Quaternary structure

Answer 169

Secondary structure

Answer 170

Tertiary structure

Answer 171

C₁₈H₃₂O₁₆

Answer 172

C₁₈H₃₆O₁₈

Answer 173

C₃H₆O₃

Answer 174

C₃H₃O₃

Answer 175

It dry the paper

Answer 176

It discharge the pulp at the screen of Fourdriner table

Answer 177

Web structure is consolidated

Answer 178

It reduces the thickness of paper

Answer 179

It becomes ineffective after some time

Answer 180

Its high cost

Answer 181

It is not easily/rapidly degraded on nature

Answer 182

It is less effective than others

Answer 183

Highly acidic

Answer 184

500 to 900°C

Answer 185

900 to 1000°C

Answer 186

250 to 500°C

Answer 187

950 to 1300°C

Answer 188

None of these

Answer 189

Oxides of carbon

Answer 190

Oxides of sulphur

Answer 191

Oxides of nitrogen

Answer 192

None of these

Answer 193

Microbes and organic matter

Answer 194

Organic matter

Answer 195

Nucleic acid

Answer 196

Carbohydrate

Answer 197

Kill insects

Answer 198

Control the growth of fungus

Answer 199

Kill plants

Answer 200

Kill herbs

Answer 201

Unemployment

Answer 202

Clean drinking water

Answer 203

Growing population

Answer 204

Shortage of food

Answer 205

Carbon dioxide

Answer 206

Carbon monoxide

Answer 207

Nitrogen peroxide

Answer 208

Sulphure dioxide

Answer 209

Non-renewable

Answer 210

Trophosphere

Answer 211

Thermosphere

Answer 212

Mesosphere

Answer 213

Stratosphere

Answer 214

All are correct

Answer 215

One primary alcoholic group

Answer 216

One – CHO group

Answer 217

Four secondary alcoholic group

Answer 218

Dissolved oxygen

Answer 219

All of these

Answer 220

Flow spreader, Drying, pressing, calendar stock

Answer 221

Flow spreader, pressing, drying, calendar stock

Answer 222

Calendar stock, Drying, pressing, flow spreader

Answer 223

Calendar stock, flow spreader, pressing drying

Answer 224

Safe for human consumption

Answer 225

The ground water

Answer 226

The Surface water

Answer 227

Now safe or human consumption

Answer 228

Combustion

Answer 229

Coagulation

Answer 230

Purification

Answer 231

Chlorination

Answer 232

Global warming

Answer 233

Excess release of carbon monoxide by incomplete combustion

Answer 234

Excess formation of CO₂ by combustion and animal respiration

Answer 235

Excess NO₂ and SO₂ from burning fossil fuels

Answer 236

Excess production of NH₃ by industry and coal gas

Answer 237

Carbon dioxide

Answer 238

Sulphure dioxide

Answer 239

Industrial discharges

Answer 240

A combination of smoke and fog

Answer 241

Is colourless

Answer 242

All of these

Answer 243

A natural phenomenon

Answer 244

Adipic acid

Answer 245

Combines with hemoglobin

Answer 246

Inactivates nerves

Answer 247

Combines with oxygen

Answer 248

Inhibits glycolysis

Answer 249

Nitric oxide

Answer 250

Sulphure dioxide

Answer 251

Nitrogen oxide

Answer 252

Nitrous oxide

Answer 253

Liver worts

Answer 254

Home worts

Answer 255

Epiphytic lichens

Answer 256

Becoming dirty

Answer 257

Increased shinning

Answer 258

Harmful stress

Answer 259

More soluble as compared to smaller crystals

Answer 260

Easy to spread in the field

Answer 261

Less toxic

Answer 262

Assimilated in the root hairs of plants

Answer 263

Greater than 4 ppm

Answer 264

Greater than 8 ppm

Answer 265

4 – 8 ppm

Answer 266

Less than 4 ppm

Answer 267

Liver cancer

Answer 268

Lung cancer

Answer 269

Mouth cancer

Answer 270

Skin cancer

Answer 271

Both are formed by same type of monomers

Answer 272

Both are polysaccharides

Answer 273

Both can be found in living things

Answer 274

Cellulose is greater in amount on earth as compared to starch

Answer 275

Calorimeter

Answer 276

Conductivity meter

Answer 277

Nitrogen oxide

Answer 278

Sulphur oxide

Answer 279

Chromium (III)

Answer 280

Chromium (VI)

Answer 281

Excess SO₂

Answer 282

Low temperature

Answer 283

Excess NH₃

Answer 284

High temperature

Answer 285

Biochemical oxygen demand

Answer 286

All of these

Answer 287

A measure of the organic matter presents in water

Answer 288

Usually less than COD

Answer 289

Electrostatic precipitator

Answer 290

Cyclone separator

Answer 291

Wet scrubber

Answer 292

Fabric filter

Answer 293

Nilric oxide and unburnt hydrocarbons

Answer 294

Nitrons oxide and unburnt hydrocarbons

Answer 295

N₂O and burnt hydrocarbons

Answer 296

NO and burnt hydrocarbons

Answer 297

Inhalation of seasonal pollen

Answer 298

Low temperature

Answer 299

Eating of seasonal vegetables

Answer 300

Wet and dry environment

Answer 301

Hydrolysis of monomers

Answer 302

Coordination reaction between monomers

Answer 303

Condensation reaction between monomers

Answer 304

Conversion of monomer to monomer ions by protons

Answer 305

Remove suspended particles

Answer 306

Kill germs

Answer 307

Remove hardness

Answer 308

Increase oxygen content

Answer 309

Alkalinity

Answer 310

Buffer action

Answer 311

Neutrality

Answer 312

Arsenic into the atmosphere

Answer 313

Oil spill in water

Answer 314

Industrial waste containing mercury into fishing water

Answer 315

Organic waste into drinking water

Answer 316

Cement industry

Answer 317

Leather tanning

Answer 318

Fertilizer industry

Answer 319

Water purification

Answer 320

Acetaldehyde

Answer 321

Formaldehyde

Answer 322

Chlorobenzene

Answer 323

Reduction of thickness of ozone in troposphere

Answer 324

Hole in ozone layers

Answer 325

Reduction in thickness of ozone layer in stratosphere

Answer 326

Increase concentration of ozone

Answer 327

Caron dioxide

Answer 328

Chloroform

Answer 329

Coagulation

Answer 330

Secondary pollutant

Answer 331

Primary pollutant

Answer 332

Non-renewable

Answer 333

Household waste

Answer 334

Automobile exhausts

Answer 335

Radio-active fall out

Answer 336

Pesticide residue

Answer 337

Dissolved salts

Answer 338

Dissolved oxygen

Answer 339

All of these

Answer 340

Dissolved hydrogen

Answer 341

Thermal power plant

Answer 342

Solid waste disposal sites

Answer 343

All of the above

Answer 344

Sewage treatment plant

Answer 345

None of these

Answer 346

Forest fires

Answer 347

Global warming

Answer 348

Increased incidence of skin cancer

Answer 349

Riboflavin

Answer 350

Ascorbic acid

Answer 351

Carbon dioxide

Answer 352

Carbon monoxide

Answer 353

Remains same

Answer 354

Unpredictable

Answer 355

Three dimensional twisting and folding of peptide chain

Answer 356

Developing hydrogen bonding in peptide chain

Answer 357

Unfolding of protein

Answer 358

Hydrolysis of protein

Answer 359

Basic elements

Answer 360

Trace elements

Answer 361

Nutrient elements

Answer 362

Neutralization of soil

Answer 363

Drying of soil

Answer 364

Acidification of soil

Answer 365

Combustion of soil

Answer 366

Fungicides, insecticides, bactericides and

Answer 367

Balloons and turbo-prop airplanes

Answer 368

Atomic explosions and industrial wastes

Answer 369

Aerosols and high flying jets

Answer 370

950 to 1300+C

Answer 371

250 to 500°C

Answer 372

500 to 900°C

Answer 373

900 to 1000°C

Answer 374

Carbon dioxide

Answer 375

Nitrogen oxides and chloro fluorocarbon

Answer 376

Carbon dioxide

Answer 377

Sulphure dioxide

Answer 378

Biotic components

Answer 379

Biotic and abiotic components of environment

Answer 380

Plants only

Answer 381

Photochemical oxidants

Answer 382

Sulphur dioxide

Answer 383

Chlorofluorocarbon

Answer 384

Rapid growth of population

Answer 385

Urbanization

Answer 386

Industrialization

Answer 387

Increase of plantation

Answer 388

Polyvinyl chloride

Answer 389

Polyethene

Answer 390

None of these

Answer 391

Stratosphere

Answer 392

Troposphere

Answer 393

Ionosphere

Answer 394

Chloramines

Answer 395

Air and soil

Answer 396

Air, water and soil

Answer 397

Air and water

Answer 398

Copper Sulphate

Answer 399

Barium Sulphate

Answer 400

Nickel Sulphate

Answer 401

Is antagonistic to CO₂

Answer 402

Has higher affinity for hemoglobin as compared to oxygen

Answer 403

Is destructive to O₃

Answer 404

Is carcinogenic

Answer 405

Carbon dioxide

Answer 406

Carbon monoxide

Answer 407

Hydrocarbons

Answer 408

Sulphur dioxide

Answer 409

Glucose and maltose

Answer 410

Fructose and maltose

Answer 411

Fructose and lactose

Answer 412

Glucose and fructose

Answer 413

CO pollution

Answer 414

Ozone depletion

Answer 415

CO₂ Pollution

Answer 416

SO₂ and SO₃

Answer 417

Peroxy acetyl nitrate

Answer 418

Chlorine nitrate

Answer 419

Disposal of industrial effluents

Answer 420

Oil leaks and spills

Answer 421

Livestock waste

Answer 422

Paper is wounded in the form of reel

Answer 423

Paper thickness in reduced

Answer 424

Moisture is removed

Answer 425

Pulp is spread over fabric or screen

Answer 426

Agro-industry

Answer 427

Thermal power plant

Answer 428

All the above

Answer 429

Polyurethane

Answer 430

Polystyrene

Answer 431

Calcium (II)

Answer 432

Chromium (VI)

Answer 433

Chromium (III)

Answer 434

Sodium (I)

Answer 435

Increase of concentration of O₃ in tropical region

Answer 436

Depletion in total amount of O₃ in particular region

Answer 437

Decomposition of O₂ to O₃ in sunlight

Answer 438

Formation of a complex of O₃ with hydrocarbons

Answer 439

Lithosphere

Answer 440

Hydrosphere

Answer 441

Stratosphere

Answer 442

Polyethylene

Answer 443

Automobile exhausts

Answer 444

Smoke/fly ash

Answer 445

2, 4-D and pesticides

Answer 446

Lithosphere

Answer 447

Hydrosphere

Answer 448

Atmosphere

Answer 449

Non-renewable

Answer 450

Increases nitrogen contents of soil

Answer 451

Acts pesticide

Answer 452

Increases sulphur contents of soil

Answer 453

Increases oxygen contents of soil

Answer 454

Flood in Ravi

Answer 455

Temperature mediated spoilage of marble

Answer 456

Air pollutants from Lahore chemical industries

Answer 457

All of these

Answer 458

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

Answer 459

Troposhere is a dusty zone containing water vapor and clouds.

Answer 460

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

Answer 461

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

Answer 462

Noise pollution

Answer 463

Radioactive pollution

Answer 464

Air pollution

Answer 465

Water pollution

Answer 466

To help in fixing of bacteria

Answer 467

To help to clean the atmosphere

Answer 468

To help plant to undergo photosynthesis

Answer 469

To destroy nitrogen oxide from the atmosphere

Answer 470

2ppm – 4ppm

Answer 471

4ppm – 8ppm

Answer 472

2ppm – 3ppm

Answer 473

2ppm – 6ppm

Answer 474

Oil spills in H₂O

Answer 475

Organic waste in drinking H₂O

Answer 476

Industrial waste Having Hg

Answer 477

Arsenic (As) into atmosphere

Answer 478

Sulphure dioxide

Answer 479

Carbon monoxide

Answer 480

Nitrous oxide

Answer 481

Blue baby syndrome

Answer 482

Intestinal irritation

Answer 483

Change in taste and odour

Answer 484

Preventing reaction between oxygen and hemoglobin

Answer 485

Destruction of hemoglobin

Answer 486

Forming stable compound with hemoglobin

Answer 487

Combining with oxygen to form carbon dioxide

Answer 488

Carbon monoxide

Answer 489

Sulphure dioxide

Answer 490

Haemocyanin

Answer 491

Chlorophyll

Answer 492

Vitamin B₁₂

Answer 493

Carbonic anhydrase

Answer 494

Chromium V

Answer 495

Chromium III

Answer 496

Chromium VI

Answer 497

Chromium IV

Answer 498

Ozone and dust

Answer 499

SO₂ and NO₂

Answer 500

CO₂ and CO

Answer 501

SO₃ and CO

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:

You May Also Like

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:

You May Also Like

Latest Updates

Mustansar Khan

Leave a Reply Cancel reply