421: Unemployment which occurs when workers move from one job to another job is known as
(a) Seasonal unemployment
(b) Frictional unemployment
(c) Technological unemployment
(d) Cyclical unemployment
422: Assertion (A): Existence of human life on Venus is highly improbable.
Reason (R): Venus has extremely high level of carbon dioxide in its atmosphere.
(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 the correct explanation of A
(c) A is true but R is false.
(d) A is false but R is true.
423: Consider the following:
1. Electromagnetic radiation
2. Geothermal energy
3. Gravitational force
4. Plate movements
5. Rotation of the earth
6. Revolution of the earth
Which of the above are responsible for bringing dynamic changes in the surface of the earth?
(a) 1, 2, 3 and 4 only
(b) 1, 3, 5 and 6 only
(c) 2, 4, 5 and 6 only
(d) 1, 2, 3, 4, 5 and 6
424: The last major extension of British Indian territory took place during the time of
(a) Dufferin
(b) Dalhousie
(c) Lytton
(d) Curzon
425: The earliest evidence of silver in India is found in the
(a) Harappan culture
(b) Chalcolithic cultures of Western India
(c) Vedic texts
(d) Silver punch-marked coins