CBSE Class 9 Science Natural Resources MCQs Set B

Question. Soil is a part of
(a) atmosphere
(b) lithosphere
(c) hydrosphere
(d) ionosphere

Answer: B

Question. Biogeochemical cycles are also known as
(a) sedimentary cycles
(b) gaseous cycles
(c) material cycles
(d) cycles of water

Answer: C

Question. Acid rain mainly contains
(a) nitric acid 
(b) hydrochloric acid
(c) Sulphuric acid 
(d) (a) and (c)

Answer: D

Question. CO₂ and O₂ balance in atmosphere is due to
(a) Photosynthesis
(b) respiration
(c) leaf anatomy
(d) photorespiration

Answer: A

Question. Coal is an / a
(a) exhaustible resource 
(b) inexhaustible resource
(c) potential resource 
(d) none of the options

Answer: A

Question. Biosphere is made of
(a) living beings and their remains
(b) living beings, lithosphere, hydrosphere and atmosphere
(c) living beings and lithosphere
(d) living beings, lithosphere and hydrosphere.

Answer: B

Question. Soil erosion can be prevented by
(a) deforestation
(b) afforestation
(c) overgrazing
(d) removal of vegetation

Answer: B

Question. Nodules in the roots of legume plants contain
(a) nitrogen fixing bacteria 
(b) sulphur fixing bacteria
(c) potassium fixing bacteria 
(d) none of the options

Answer: A

Question. Which gas is manly responsible for the depletion of ozone layer ?
(a) oxygen 
(b) CFC
(c) Nitrogen dioxide
(d) All of the options

Answer: B

Question. Maximum air in which we breath is present at
(a) troposphere
(b) stratosphere
(c) ionosphere
(d) mesosphere

Answer: A

Question. Plants and animals are known as
(a) biotic resources 
(b) Abiotic resources 
(c) machines
(d) none of the options

Answer: A

Question. Which of the following is a free living nitrogen fixing bacteria present in soil ?
(a) Azotobacter
(b) Nitrosomonas
(c) Rhizobium
(d) pseudomonas

Answer: A

Question. Nitrogen fixation is
(a) Nitrogen Ammonia
(b) Nitrogen nitrates
(c) Nitrogen Amino acid
(d) Both A and B

Answer: D

Question. Ozonosphere occurs at height of
(a) 8-10km above poles 
(b) 8-10km above equator
(c) 20-26 km above the earth surface 
(d) 11-16km above equator

Answer: C
 

Question. Soil erosion can be prevented by
(a) deforestation 
(b) afforestation
(c) overgrazing 
(d) removal of vegetation

Answer: B

Question. A renewable source of energy is
(a) petroleum
(b) coal
(c) nuclear fuel
(d) trees

Answer: D