56: Which one of the following Articles of the Constitution of India says that the executive power of every State shall be so exercised as not to impede or prejudice the exercise of the executive power of the Union ?
(a) Article 257
(b) Article 258
(c) Article 355
(d) Article 356
57: Suppose a rocketship is receding from the earth at a speed of 2/10th the velocity of light. A light in the rocketship appears blue to the passengers on the ship. What colour would it appear to an observer on the earth?
(a) Blue
(b) Orange
(c) Yellow
(d) Yellow-orange
58: Rajagopalachari's formula was:
(a) Merger of princely States
(b) Formulation of a separate Muslim State
(c) Plebiscite to Muslims whether they should form a separate State
(d) Forming a Constituent Assembly
59: The temperature for pasteurisation of milk is selected so as to:
(a) Kill the micro organisms
(b) Kill all bacteria
(c) Store it for long time without coagulation
(d) Kill the micro organisms and other harmful bacteria
60: Total internal reflection occurs when light travels from:
(a) A rarer medium to a denser medium
(b) A denser medium to a rarer medium
(c) A rarer medium to a denser medium and the angle of incidence is less than the critical angle
(d) A rarer medium to a denser medium and the angle of incidence is greater than the critical angle