1976: The known forces of natures can be divided into four classes, viz., gravity, electromagnetism, week nuclear force and strong nuclear force. With reference to them, which one of the following statements is not correct?
(a) Gravity is the strongest of the four
(b) Electromagnetism act only on particles with an electric charge
(c) Weak nuclear force causes radioactivity
(d) Strong nuclear force holds protons and neutrons inside the nuclear of an atom.
1977: Consider the following statements:
1. Infant mortality rate takes into account the death of infants within a month after birth.
2. Infant mortality rate is the number of infant deaths in a particular year per 100 live births during that year.
Which of the above statements is/are correct?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
1978: The highest fat content is found in the milk of
(a) Buffalo
(b) Cow
(c) Camel
(d) Reindeer
1979: Nehru Model of Development laid greater stress on:
(a) Collective use of land
(b) Using imported seeds
(c) Agricultural development
(d) Rapid industrialisation with particular emphasis on the development of basic and heavy industries
1980: Consider the following chemicals :
1. Benzene
2. Carbon tetrachloride
3. Sodium Carbonate
4. Trichloroethylene
Which of the above is/are used as dry cleaning chemicals ?
(a) 1 Only
(b) 2 Only
(c) 1, 2 and 4 Only
(d) 1, 2, 3 and 4