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Chemistry Class 10th

321. Exosphere is beyond ______.

A) Troposphere

B) Stratosphere

C) Mesosphere

D) Thermosphere

Answer
D

322. Due to presence of ions, ______ is also called as ionosphere.

A) Troposphere

B) Stratosphere

C) Mesosphere

D) Thermosphere

Answer
D

323. The substance that cause pollution are called Pollutants:

A) True

B) False

Answer
A

324. Primary pollutants are substances, which are released directly in the air.

A) True

B) False

Answer
A

325. Which of the following is type of secondary air pollution:

A) Acid Rain

B) Sulpher Oxides

C) Carbon Monoxides

D) Carbon Dioxides

Answer
A

326. Incinerators reduce the solid waste upto:

A) 20 %

C) 50 %

D) 85%

D) 91 %

Answer
C

327. Which of the following is not a type of nature source of particulates?

A) Volcanic Eruption

B) Car Smoke

C) Salt Sprays from Ocean

D) Forest Fires

Answer
B

328. Electrical Discharge during storms produce, which of the following?

A) Carbon dioxide

B) Sulpher Oxide

C) Nitrogen Oxides

D) Carbon Monoxide

Answer
D

329. Rock Weathering produces:

A) Carbon monoxide

B) Sulpher Oxide

C) Nitrogen Oxide

D) Carbon Dioxide

Answer
B

330. Which of the following insect contributes towards the emission of Methane?

A) Ants

B) Grasshoppers

C) Termites

D) Beetles

Answer
C

331. Cars produce ______% of the total carbon monoxide:

A) 30

B) 40

C) 70

D) 75

Answer
D

332. CFCs are used in which of the following:

A) Aerosols

B) Refrigerator

C) Air Conditioners

D) All of the above

Answer
D

333. CO reduces the oxygen carrying ability of Cells:

A) True

B) False

Answer
A

334. Yellowing of Limestone and Marble is due to:

A) Carbon Dioxide

B) Carbon Monoxide

C) Sulpher Dioxide

D) Ozone

Answer
C

335. Rain having pH less than ______ is called acid rain.

A) 3.5

B) 5.5

C)7.5

D) 6.52

Answer
B

336. The Process of enrichment of water with salts and nutrients:

A) Eutrophication

B) Enrichment

C) Blooms

D) None of the above

Answer
A

337. Oxides of Carbon, Nitrogen and Sulpher are highly soluble in:

A) Water

B) Oils

C) Both A and B

D) None of the above

Answer
A

338. The Nitric oxides react with Ozone and produce :

A) Nitrogen  Trioxide

B) Oxygen

C) Both A and B

D) None of the above

Answer
D

339. Fishes cannot survive at pH below:

A) 2

B) 4

C) 5

D) 7

Answer
C

340. Frogs can tolerate pH of :

A) 5

B) 6

C) 4

D) 2

Answer
C
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