Chemistry Class 10th

321. Exosphere is beyond ______.

A) Troposphere

B) Stratosphere

C) Mesosphere

D) Thermosphere

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

A) Troposphere

B) Stratosphere


C) Mesosphere

D) Thermosphere

323. The substance that cause pollution are called Pollutants:

A) True

B) False

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

A) True

B) False

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

A) Acid Rain

B) Sulpher Oxides

C) Carbon Monoxides

D) Carbon Dioxides

326. Incinerators reduce the solid waste upto:

A) 20 %

C) 50 %

D) 85%

D) 91 %

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

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

A) Carbon dioxide

B) Sulpher Oxide

C) Nitrogen Oxides

D) Carbon Monoxide

329. Rock Weathering produces:

A) Carbon monoxide

B) Sulpher Oxide

C) Nitrogen Oxide

D) Carbon Dioxide

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

A) Ants

B) Grasshoppers

C) Termites

D) Beetles

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

A) 30

B) 40

C) 70

D) 75

332. CFCs are used in which of the following:

A) Aerosols

B) Refrigerator

C) Air Conditioners

D) All of the above

333. CO reduces the oxygen carrying ability of Cells:

A) True

B) False

334. Yellowing of Limestone and Marble is due to:

A) Carbon Dioxide

B) Carbon Monoxide

C) Sulpher Dioxide

D) Ozone

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

A) 3.5

B) 5.5

C)7.5

D) 6.52

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

A) Eutrophication

B) Enrichment

C) Blooms

D) None of the above

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

338. The Nitric oxides react with Ozone and produce :

A) Nitrogen  Trioxide

B) Oxygen

C) Both A and B

D) None of the above

339. Fishes cannot survive at pH below:

A) 2

B) 4

C) 5

D) 7

340. Frogs can tolerate pH of :

A) 5

B) 6

C) 4

D) 2