4246: Ice skating can be used to demonstrate that when ice is under pressure, its:
(a) Melting point is lowered
(b) Melting point is raised
(c) Melting point remains unchanged
(d) Coefficient of friction with metal is reduced
4247: Photo chemical smog is a resultant of the reaction among.
(a) NO2, O3 and peroxyacetyl nitrate in the presence of sunlight
(b) CO, O2 and peroxyacetyl nitrate in the presence of sunlight
(c) CO, CO2 and NO2 at low temperature
(d) High concentration of NO2, O3 and CO in the evening
4248: Iron ore mines are located in which of the following group of places?
(a) Bokaro, Balaghat, Hazaribagh
(b) Singhbhum, Monghyr, Singareni
(c) Jharia, Raniganj, Wardha
(d) Singhbhum, Mayurbhani, Keonihar
4249: Plankton refers to:
(a) A kind of fish
(b) A submerged platform in waters
(c) Drifting of organisms in a body of water
(d) A kind of animal living under water
4250: Which one of the following is not a feature of the Government of India Act of 1935?
(a) Diarchy at the Centre as well as in the provinces
(b) A bicameral legislature
(c) Provincial autonomy
(d) An All India Federation