4121: Consider the following chemicals :
1. Benzene
2. Carbon tetrachloride
3. Sodium Carbonate
4. Trichloroethylene
Which of the above is/are used as dry cleaning chemicals ?
(a) 1 Only
(b) 2 Only
(c) 1, 2 and 4 Only
(d) 1, 2, 3 and 4
4122: Which one of the following is an artificial lake ?
(a) Kodaikanal (Tamil Nadu)
(b) Kolleru (Andhra Pradesh)
(c) N ainital (Uttarakhand)
(d) Renuka (Himachal Pradesh)
4123: What are the possible limitations of India in mitigating the global warming at present and in the immediate future ?
1. Appropriate alternate technologies are not sufficiently available.
2. India cannot invest huge funds in research and development.
3. Many developed countries have already set up their polluting industries in India.
Which of the statements given above is/are correct ?
(a) 1 and 2 only
(b) 2 only
(c) 1 and 3 only
(d) 1, 2 and 3
4124: A Person has to completely put each of three liquids : 403 litres of petrol, 465 litres of diesel and 496 litres of the Mobil Oil in bottles of equal size without mixing any of the above three types of liquids such that each bottle is completed filled. What is the least possible number of bottles required ?
(A) 46
(B) 34
(C) 44
(D) None of the above
4125: Match the drainage basins labelled as A, B, C and D with the names listed below and select the correct answer using the codes given below the names of the drainage basins.
Names of drainage basins :
1. Ganga-Brahmaputra
2. Indus
3. Parana
4. Zambezi
Code
(a) 3 1 2 4
(b) 1 3 4 2
(c) 1 3 2 4
(d) 3 1 4 2