156: Consider the following:
1. Oxides of Hydrogen
2. Oxides of Nitrogen
3. Oxides of Sulphur
Which of the above causes/cause acid rain ?
(a) 1 and 2 only
(b) 2 and 3 only
(c) 3 only
(d) 1, 2 and 3
157: With reference to micro-irrigation, which of the following statements is/are correct ?
1. Fertilizer/nutrient loss can be reduced.
2. It is the only means of irrigation in dry land farming.
3. In some areas of farming, receding of ground water table can be checked.
Select the correct answer using the codes given below:
(a) 1 only
(b) 1 and 3 only
(c) 2 and 3 only
(d) 1, 2 and 3
158: Assertion (A):
A Chemical reaction becomes faster at higher temperatures.
Reason (R):
At higher temperatures, molecular motion becomes more rapid.
(a) Both A and R are individually true and R is the correct explanation of A
(b) Both A and R are individually true but R is NOT a correct explanation of A
(c) A is true but R is false
(d) A is fasle but R is true
159: Which one of the following was the cause of disintegration of the Mughal Empire?
(a) War of succession among sons of Aurangzeb
(b) Attacks of Nadir Shah and Ahmad Shah Abdali
(c) Revolts of various communities like Jats, Sikhs, Rajputs, etc.
(d) All of the above mentioned factors contributed to the downfall of the Mughal Empire
160: Assertion (A):
Chile continues to be an important producer of copper in the world.
Reason (R):
Chile is endowed with the world's largest deposit of porphyry copper.
(a) Both A and R are true, and R is the correct explanation of A
(b) Both A and R are true, but R is not a correct explanation of A
(c) A is true, but R is false
(d) A is false, but R is true