1521: Which one of the following is NOT radioactive ?
(a) Astatine
(b) Francium
(c) Tritium
(d) Zirconium
1522: An artificial satellite orbiting around the Earth does not fall down. This is so because the attraction of Earth
(a) Does not exist at such distance.
(b) Is neutralized by the attraction of the moon.
(c) Provides the necessary speed for its steady motion.
(d) Provides the necessary acceleration for its motion.
1523: Assertion (A) :
Synthetic detergents can lather well in hard water.
Reason (R) :
Synthetic detergents form soluble calcium and magnesium salts with hard water.
(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 a correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
1524: When the Indian Muslim League was inducted into the interim government in 1946, Liyaqat Ali Khan was assigned the portfolio of
(a) Foreign affairs
(b) Home
(c) Finance
(d) Defence
1525: In what way does the Indian Parliament exercise control over the administration?
(a) Through Consultative Committees of various ministries
(b) Through Parliamentary Committees
(c) By making the administrators send periodic reports
(d) By compelling the executive to issue writs