Chemistry Class 10th

301. The density of atmosphere is:

A) 0.0013q/cm3

B) 0.2344 q/cm3

C) 0.0045 q/cm3

D) None of the above

302. The Percentage of N2 in the atmosphere is:

A) 78.1

B) 20.9

C) 32

D)57

303. The Percentage of Oxygen in the atmosphere is:

A) 78.1

B) 20.9

C) 32

D)57

304. The Atmosphere extends upto _____ km.

A) 150

B) 235

C) 450

D) 500

305. The pressure is 1atm at ______.

A) Mountains

B) Plains

C) Sea level

D) Deserts

306. The Atmosphere is divided into _____parts

A) None

B) Two

C) Three

D) Four

307. The first layer of the atmosphere is:

A) Troposphere

B) Stratosphere

C) Mesosphere

D) Thermosphere

308. Tropo means:

A) Turning

B) Tropical

C) Transparent

D) Thermal

309. The Average height of troposphere is :

A) 5km

B) 7 km

C) 11Km

D) 15 km

310. All weather phenomena take place in:

A) Troposphere

B) Stratosphere

C) Mesosphere

D) Thermosphere

311. The temperature drops by _____ with every 1 km increase in altitude.

A) 2 C

B) 4 C

C) 6.5 C

D) None of the above

312. The second layer is of atmosphere is:

A) Troposphere

B) Stratosphere

C) Mesosphere

D) Thermosphere

313. The Height of Stratosphere goes from 11 km to _____.

A) 20km

B) 25km

C) 50 Km

D) 66 Km

314. Ozone is the major component of :

A) Troposphere

B) Stratosphere

C) Mesosphere

D) Thermosphere

315. The Ozonesphere is located at height of:

A) 20 km

B) 30 km

C) 35 km

D) 49 Km

316. Ozone absorbs:

A) Sunlight

B) Heat

C) Infrared Light

D) UV light

317. Ozone layer gets damaged by:

A) Soot

B) CFCs

C) Tar

D) SOX

318. The Mesosphere is present at the height of:

A) 0-11km

B) 11-50 km

C) 50-85 km

D) 85-200 km

319. The Temperature range of Mesosphere is:

A) 15 to -56

B) -56 to -2

C) -2 to -92

D) -92 to 1200

320. The height of Thermosphere is:

A) 0-11km

B) 11-50km

C) 50-85km

D) 85-500 km