1756: Consider the following statements :
Glass can be etched or scratched by
I. diamond.
II. hydrofluoric acid.
III. aquaregia.
IV. cone, sulphuric acid.
Which of these statements are correct ?
(a) I and IV
(b) II and III
(c) I and II
(d) II and IV
1757: 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.
1758: Pearls are formed inside:
(a) Squids
(b) Snails
(c) Oysters
(d) Mollusks
1759: The Prime Minister of India, at the time of his/her appointment
(a) need not necessarily be a member of one of the Houses of the Parliament but must become a member of one of the" Houses within six months
(b) need not necessarily be a member of one of the Houses of the Parliament but must become a member of the Lok Sabha within six months
(c) must be a member of one of the Houses of the Parliament
(d) must be a member of the Lok Sabha
1760: Which of the following are correctly matched?
1. Medha Patkar Environment Activist
2. Jamini Roy Painter
3. Bhuvaneshvari Squash player Kumari
Choose the correct answer from the codes given below:
(a) 1 and 2
(b) 1 and 3
(c) 2 and 3
(d) 1, 2 and 3