2546: Hughly was used as a base for piracy in the Bay of Bengal by
(a) the Portuguese
(b) the French
(c) the Danish
(d) the British
2547: A radioactive substance has a half-life of four months. Three-fourth of the substance would decay in
(a) 3 months
(b) 4 months
(c) 8 months
(d) 12 months
2548: Consider the following statements :
Hard water is not suitable for
I. drinking.
II. washing cloths with soap.
III. use in boilers.
IV. irrigating crops.
Which of these statements are correct ?
(a) I and III
(b) II and III
(c) I, II and IV
(d) I, II, III and IV
2549: The demand for Pakistan was made by the Muslim League for the first time in:
(a) 1938
(b) 1940
(c) 1941
(d) 1946
2550: In the context of India's Five Year Plans, a shift in the pattern of industrialization, with lower emphasis on heavy industries and more on infrastructure begins in
(a) Sixth Plan
(c) Eighth Plan
(c) Fourth Plan
(d) Tenth Plan