191: A small wooden block is floating in a tub of water. The water is gradually heated. The volume of the wooden block visible above the water level:
(a) Increases
(b) Decreases
(c) Fluctuates
(d) Remains the same
192: Hybridisation is useful in developing improved crops by:
(a) Creating new and better genes
(b) Eliminating undesirable genes
(c) Producing favourable combination of genes
(d) By encouraging favourable genes and removing unfavourable ones
193: Salts of which of the following elements provide colours to fireworks?
(a) Zinc and sulphur
(b) Potassium and mercury
(c) Strontium and barium
(d) Chromium and nickel
194: Department of Border Management is a Department of which one of the following Union Ministries?
(a) Ministry of Home Affairs
(b) Ministry of Defence
(c) Ministry of Shipping, Road Transport and Highways
(d) Ministry of Environment and Forests
195: At which one of the following Place did Mahatma Gandhi first start his Satyagraha in India?
(a) Ahmedabad
(b) Bardoli
(c) kheda
(d) Champaran