726: Which one of the following is not a site for in-situ method of conservation of flora?
(a) Wildlife Sanctuary
(b) Botanical Garden
(c) National Park
(d) Biosphere Reserve
727: Ilbert Bill was prepared for abolishing judicial disqualification based on racial distinction. The bill was vehemently criticised by the Europeans living in India. Who was the Governor-General at that time?
(a) Lord Ripon
(b) Lord Dalhousie
(c) Lord Curzon
(d) Lord Chelmsford
728: Which one of the following authorities makes recommendation to the Governor of a State as to the principles for determining the taxes and duties which may be appropriated by the Panchayats in that particular State?
(a) District Planning Committees
(b) State Finance Commission
(c) Finance Ministry of that State
(d) Panchyati Raj Ministry of that State
729: Consider the following statements :
Chlorofluorocarbons, known as ozone-depleting substances, are used
1. in the production of plastic foams
2. in the production of tubeless tyres
3. in cleaning certain electronic components
4. as pressurizing agents in aerosol cans
Which of the statements given above is/are correct?
(a) 1, 2 and 3 only
(b) 4 only
(c) 1, 3 and 4 only
(d) 1, 2, 3 and 4
730: The alpha-particle carries two positive charges. Its mass is very nearly equal to that of
(a) two protons
(b) an atom of helium
(c) sum of masses of two positrons and two neutrons
(d) two positrons as each positron carries a single positive charge