2126: Who among the following was not a no changer ?
(a) Dr. Ansari
(b) Dr. Rajendra Prasad
(c) Sardar Patel
(d) Motilal Nehru
2127: Urea is prepared by the chemical reaction of:
(a) Ammonia and Carbon dioxide
(b) Ammonium sulphate and calcium chloride
(c) Acetamide and ethyl alcohol
(d) Chlorine and water
2128: Magasthenes visited the court of:
(a) Ashoka
(b) Harsha
(c) Chandragupta Maurya
(d) Vikramaditya
2129: Arrange the following three atmospheric layers starting from the surface of the earth
A. Stratosphere
B. Ionosphere
C. Troposphere
(a) A, B, C
(b) C, A, B
(c) A, C, B
(d) C, B, A
2130: Seasonal migration of men and animals from lower to higher altitudes during the summer is known as
(a) Nomadism
(b) Migration
(c) Transhumance
(d) Pastoralism