3751: Two important characteristics of a hypothesis are that it should be testable and that it should be stated in a manner that it can be refuted. Which one of the following hypotheses, fulfils these characteristics ?
(a) Intelligent persons have good memory
(b) Some birds are animals
(c) Some businessmen are dishonest
(d) All men are mortal
3752: Assertion (A):
A Chemical reaction becomes faster at higher temperatures.
Reason (R):
At higher temperatures, molecular motion becomes more rapid.
(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 fasle but R is true
3753: There are only two known examples of cave paintings of the Gupta period in ancient India. One of these is paintings of Ajanta caves. Where is the other surviving example of Gupta paintings ?
(a) Ellora caves
(b) Bagh caves
(c) Nasik caves
(d) Lomas Rishi cave
3754: Chambal river flows through the States of:
(a) Maharashtra, Gujarat and Madhya Pradesh
(b) Uttar Pradesh, Madhya Pradesh and Orissa
(c) Uttar Pradesh, Madhya Pradesh and Rajasthan
(d) Uttar Pradesh, Madhya Pradesh and Bihar
3755: Who were Jagirdars during the reign of Akbar?
(a) Large estate owners
(b) Officials of state who were given "jagir" in place of cash pay
(c) Revenue collectors
(d) Autonomous rulers under Akbar