2181: A suitable site of a cement plant requires proximity to:
(a) Coal and iron
(b) Limestone and manganese
(c) Limestone and gypsum
(d) Coal and gypsum
2182: Consider the following statements :
If there were no phenomenon of capillarity
1. it would be difficult to use a kerosene lamp
2. one would not be able to use a straw to consume a soft drink
3. the blotting paper would fail to function
4. the big trees that we see around would not have grown on the Earth
Which of the statements given above are correct?
(a) 1, 2 and 3 only
(b) 1, 3 and 4 only
(c) 2 and 4 only
(d) 1, 2, 3 and 4
2183: Which one of the following plants is effective in reducing water pollution and is also useful for producing bio gas ?
(a) Eucalyptus
(b) Water hyacinth
(c) Salvinio
(d) Lotus
2184: The substitution of steel for wooden ploughs in agricultural production is an example of
(a) labour-augmenting technological progress
(b) capital-augmenting technological progress
(c) capital-reducing technological progress
(d) None of the above
2185: With whose permission did the English set up their first factory in Surat?
(a) Akbar
(b) Jahangir
(c) Shahjahan
(d) Aurangzeb