These MCQs are based on Today’s Targets given here
Q.1) Consider the following statements :
(1). Mercury takes smallest time to spin around its axis
(2). Mercury takes smallest time to orbit around the sun
Select the correct statement/statements using the codes given below:
a) Only 1 is correct
b) Only 2 is correct
c) Both 1 and 2 are correct
d) Neither 1 nor 2 is correct
Ans. B
Explanation: Jupiter takes smallest time to spin around its axis. Hence, statement 1 is wrong.
Mercury takes smallest time to orbit sun. Hence, statement 2 is correct
Source : NCERT 6th : The Earth Our Habitat, Chapter 1, Page 3
Q.2) Consider the following statements regarding an equinox:
a) During an equinox, North Hemisphere experiences slightly longer days
b) During an equinox, South Hemisphere experiences slightly longer days
c) During an equinox, entire earth experiences equal days and equal nights
d) During an equinox, entire earth experiences equal days and equal nights, except the equator.
Ans. C
On 21st March and September 23rd, direct rays of the sun fall on the equator. At this position, neither of the poles is tilted towards the sun; so, the whole earth experiences equal days and equal nights. This is called an equinox.
Source : NCERT 6th : The Earth Our Habitat, Chapter 3, Page 20
Q.3) Consider the following statements related to sunset:
(1). The local time changes by fifteen minutes for every one degree of longitude.
(2). In India, the sun rises two hours earlier in the east (Arunachal Pradesh) than in the west (Gujarat)
(3). Due to its large size, USA has 6 time zones.
Select the correct statement/statements using the codes given below:
a) Only 1 and 2 are correct
b) Only 2 and 3 are correct
c) Only 1 and 3 are correct
d) All are correct
Ans. B
Explanation:
Earth rotates 360 degree in 24 hours i.e. 15 degree in one hour (60 minutes) i.e. one degree in 4 minutes. Hence, the local time changes by four minutes for every one degree of longitude. So, statement 1 is wrong.
Statement 2 and 3 are correct.
Source : NCERT 6th : The Earth Our Habitat, Chapter 7, Page 48
Q.4) Consider the following statements:
(1). Biomethane is produced by anaerobic combustion of organic matter in chemically controlled laboratory conditions
(2). If used in automobile engines, it reduces the net impact on environment
Select the correct answer using the code given below:
a) Only 1 is correct
b) Only 2 is correct
c) Both 1 and 2 are correct
d) Neither 1 nor 2 is correct
Ans. B
Explanation:
- Biomethane is a naturally occurring gas
- It is produced by anaerobic digestion of organic matter such as dead animal and plant material, manure, sewage, organic waste, etc.
- This gas is produced out of natural degradation process and escapes into the atmosphere unused.
- If it is trapped and used in automobile engines, it reduces the net impact on environment and at the same time produces useful power.
Q.5) Consider the following statements:
(1). In India betting is legal only on horse racing
(2). Justice R M Lodha panel has recommended that all forms of betting should be banned in India
Select the correct answer using the code given below:
a) Only 1 is correct
b) Only 2 is correct
c) Both 1 and 2 are correct
d) Neither 1 nor 2 is correct
Ans. A
Explanation: http://www.ias4sure.com/wikiias/gs2/should-india-legalise-online-betting/