3206: Which one of the following pairs of metals constitutes the lightest metal and the heaviest metal, respectively?
(a) Lithium and mercury
(b) Lithium and osmium
(c) Aluminium and osmium
(d) Aluminium and mercury
3207: Optical fibre works on the principle of
(a) total internal reflection
(b) refraction
(c) scattering
(d) interference
3208: A company manufacturing air-conditioners has set a monthly target. The target and realised values are shown in the bar chart.
Consider the following statements based on the chart:
I. The targeted sales on a monthly basis have been achieved.
II. The overall target value has been exceeded by 7.5%.
III. The Sales Department deserves a pat on the back.
Which of the above statements is/are correct ?
(a) I alone
(b) II alone
(c) I and II
(d) II and III
3209: Panchayati Raj administration is primarily aimed:
(a) To increase agricultural production
(b) To ensure rural development
(c) To work for the upliftment of Harijans
(d) To arouse in the people of each area intensive and continuous interest in the community development programme
3210: One consistent feature found in the history of southern India was the growth of small regional kingdoms rather than large empires because of
(a) the absence of minerals like iron
(b) too many divisions in the social structure
(c) the absence of vast areas of fertile land
(d) the scarcity of manpower