621: With reference to Bombay Natural History Society (BNHS), consider the following statements :
1. It is an autonomous organization under the Ministry of Environment and Forests.
2. It strives to conserve nature through action based research, education and public awareness.
3. It organizes and conducts nature trails and camps for the general public.
Which of the statements given above is/are correct?
(a) 1 and 3 only
(b) 2 only
(c) 2 and 3 only
(d) 1, 2 and 3
622: Which one of the following countries is land locked?
(a) Bolivia
(b) Peru
(c) Suriname
(d) Uruguay
623: 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
624: Iron ore mines are located in which of the following group of places?
(a) Bokaro, Balaghat, Hazaribagh
(b) Singhbhum, Monghyr, Singareni
(c) Jharia, Raniganj, Wardha
(d) Singhbhum, Mayurbhani, Keonihar
625: Assertion (A):
In the periodic table of chemical elements, electron affinity is always found to increase from top to bottom in a group.
Reason (R):
In a group, the atomic radial generally increase from top to bottom.
(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 the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true