261: Physico-chemical characteristics of water in water sources undergo changes due to
(a) aquatic macrophytes
(b) aquatic fungi
(c) effluents
(d) evapotranspiration
262: 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
263: Consider the following statements :
1. Balaghat is known for its diamond mines.
2. Majhgawan is known for its manganese deposits.
Which of the statements given above is/are correct?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
264: The misery index is the sum of a country's unemployment and inflation rate. The higher the index, the more miserable is the country to live in. The figure given below is the Misery Index for various countries in Europe :
Which of the following conclusions can be drawn from the misery index given above ?
I. Britain is the most miserable country to live in.
II. The inflation rate in Spain is less than that in Belgium and Britain.
III. Italy and France seem to have almost identical unemployment rate.
IV. The higher the misery index, the higher the inflation rate.
Select the correct answer using the codes given below:
Codes:
(a) I alone
(b) II and III
(c) I, II, III and IV
(d) None of the above
265: The surface area of a cube is 216 sq.m. What is its volume ?
(a) 100 cu m
(b) 216 cu m
(c) 480 cu m
(d) 512 cu m