Menu
CLOSE

Science Class 7th

201. An animal that feed on plants is called

A) Producer

B) Secondary consumer

C) Primary consumer

D) Decomposer

Answer
C

202. In winter most cold blooded animals disappear because they:

A) Die

B) Hibernate

C) Migrate

D) Eaten away

Answer
B

203. The meat eaters are also known as:

A) Carnivores

B) Omnivores

C) Producers

Answer
A

204. About of the earth surface is covered by water.

A) 70%

B) 60%

C) 75%

D) 80%

Answer
A

205. The first essential requirement for the survival of life is

A) Water

B) Food

C) Air

D) None of these

Answer
C

206. The second essential requirement for the survival of life is

A) Air

B) Food

C) Water

D) None of these

Answer
C

207. Water comprises approximately of the weight of an adult body

A) 50%

B) 60%

C) 75%

D) 66%

Answer
D

208. The main sources of water on earth surface are

A) Glaciers

B) Underground water

C) Atmospheric water

D) All of the above

Answer
D

209. Oceans contain more than of total water

A) 80%

B) 92%

C) 89%

D) 97%

Answer
D

210. Atmosphere contain water as

A) Rain

B) Water vapour

C) Acid rain

 

Answer
B

211. The fresh needed for human requirements is nearly of the total

A) 0.02%

B) 1%

C) 1.5%

D) 2%

Answer
B

212. Substances that causes water pollution are called

A) Pollutant

B) Pollution

C) Water pollution

D) Option B&C

Answer
A

213. Pollution is mainly caused by sewage.

A) Air pollution

B) Industrial pollution

C) Domestic pollution

D) None of these

Answer
C

214. is the waste derived from homes, school and offices.

A) Pollution

B) Dirty water

C) Sewage

D) None of these

Answer
C

215. The poisonous waste like pesticides and fertilizer are

A) Industrial waste

B) Domestic waste

C) Agricultural waste

D) None of these

Answer
C

216. contains highly toxic compounds of mercury, lead chromium etc.

A) Sewage

B) Agricultural waster

C) Domestic waste

D) Industrial waste

Answer
D

217. Nitrogen and sulphur dissolve in rain water and cause

A) Pollution

B) Air pollution

C) Acid Rain

D) None of these

Answer
C

218. The technique which separate volatile substance from non-volatile substance is called

A) Distillation

B) Fermentation

C) Purification

D) None of these

 

Answer
A

219. Impure water can be purified by

A) Fermentation

B) Purification

C) Distillation

D) None of these

Answer
C

220. The two basic techniques used in purifications on water are

A) Boiling and cooling

B) Cooling and condensation

C) Boiling and Condensation

Answer
C
Previous
Page 10
Next
Page 12