16 .Heavy water is used as moderator a nuclear reactor. The function of the moderator is
17 .A large iceberg melts at the base but not at the top becaue
18 .Red data book gives information about species which are-
19 .If temperature rises, the coefficient of viscosity of liqid:
20 .Blue colour of the sky is consequence of
21 .The temperature of boiling water in a steam engine may be high because:
22 .Electricity is produced through dry cell from
23 .The head mirror used by E.N.T. doctors is
24 .With rise of boiling point of water the latent heat of steam:
25 .A change of 10Â° C in Centigrade scalecorresponds to what change in Fahrenheitscale
26 .Metals are good conductor of heat than insulator because
27 .Which of the following factors can decrease biological oxygen demand (BOD) of any freshwater ecosystem?
28 .Which of the following is biodegradable?
29 .Chlorofluro carbons are widely used in:
30 .A small and a large rain drops are falling through air: