1686: Which one among the following is called philosopher's wool?
(a) Zinc oxide
(b) Zinc chloride
(c) Zinc nitrate
(d) Zinc bromide
1687: When the frequency distribution is normal
(a) median, mode and mean are all different from one another
(b) mean, mode and median are identical
(c) mean is greater than mode
(d) mean is greater than median
1688: Consider the following companies:
1. Voltas
2. Titan Industries
3. Rallis India
4. Indian Hotels
Which of the above companies are in the Tata Group of Industries?
(a) 1 and 2
(b) 2, 3 and 4
(c) 1, 3 and 4
(d) 1, 2, 3 and 4
1689: Sugarcane crop matures in about:
(a) 2 months
(b) 4 months
(c) 8 months
(d) 12 months
1690: Heat from the sun is received by the earth through:
(a) Conduction
(b) Convection
(c) Radiation
(d) None of the above