1536: Consider the following which can be found in the ambient atmosphere:
1. Soot
2. Sulphur hexafluoride
3. Water vapour
Which of the above contribute to the warming up of the atmosphere ?
(a) 1 and 2 only
(b) 2 and 3 only
(c) 3 only
(d) 1, 2 and 3
1537: Regular intake of fresh fruits and vegetables is recommended in the diet since they are a good source of antioxidants. How do antioxidants help a person maintain health and promote longevity?
(a) They activate the enzymes necessary for vitamin synthesis in the body and help prevent vitamin deficiency.
(b) They prevent excessive oxidation of carbohydrates, fats and proteins in the body and help avoid unnecessary wastage of energy.
(c) They neutralize the free radicals produced in the body during metabolism.
(d) They activate certain genes in the cells of the body and help delay the ageing process.
1538: In terms of value, which one of the following commodities accounted for the largest agricultural exports by India during the three year period from 1997- 1998 to 1999-2000?
(a) Cereals
(b) Marine products
(c) Spices
(d) Tea
1539: After consolidating his power, Balban assumed the grand title of
(a) Tute-i-Hind
(b) Kaisr-i-Hind
(c) Zil-i-Ilahi
(d) Din-i-Ilahi
1540: Which statement about Amir Khusrau is not true?
(a) He worked for the Hindu-Muslim Unity
(b) He was a great poet
(c) He was a great historian
(d) He wrote poetry in Hindi and Urdu