716: 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
717: In which one among the following categories of protected areas in India are local people not allowed to collect and use the biomass?
(a) Biosphere Reserves
(b) National Parks
(c) Wetlands declared under Ramsar Convention
(d) Wildlife Sanctuaries
718: Match items in the List-I with those in the List-II and select the correct answer using the codes given below the lists:
List I (Location)
(A) Kakinada
(B) Dundigal
(C) Margao
(D) Bhadrachalam
List II (Known For/In News for)
1. Skybus Metro rail test-run
2. ITC paper board Unit
3. Bio-diesel plant
4. Indian Air Force Academy
(a) 2 1 4 3
(b) 2 4 1 3
(c) 3 1 4 2
(d) 3 4 1 2
719: Forest areas have been labelled as 1, 2, 3 and 4 in the rough outline map given:
Among these, those which were threatened in 1997 by a serious epidemic include
(a) teak forests of 3 and 4
(b) oaks forests of 1 and sal forests of 2
(c) sal forests of 3
(d) sandalwood forests of 4
720: In an atom, the order of filling up of the orbitals is governed by
(a) Aufbau principle
(b) Heisenberg's uncertainty principle
(c) Hund's rule
(d) Pauli's exclusion principle