1791: Which one of the following is in the correct sequential order in which these appeared under simulated primitive earth condition ?
(a) Methane, Hydrogen cyanide, nitriles, aminoacids
(b) Hydrogen cyanide, methane, nitriles, aminoacids
(c) Aminoacids, nitriles. Hydrogen cyanide, methane
(d) Nitriles, aminoacids, methane, Hydrogen cyanide
1792: Which one of the following statements is not correct?
(a) The presence of NaCl increases the rate of setting of Plaster of Paris
(b) Gypsum is added to the cement to slow down its rate of setting
(c) All alkaline earth metals form hydrated salts
(d) Barium and Strontium are found free in nature
1793: Among the following commodities imported by India during the year 2001-02, which one was the highest in terms of Rupee value?
(a) Edible oil
(b) Fertilizers
(c) Organic and inorganic chemicals
(d) Pearls, precious and semi-precious stones
1794: A car travels the first one-third of a certain distance with a speed of 10 km/hr, the next one-third distance with a speed of 20 km/hr and the last one-third distance with a speed of 60 km/hr. The average speed of the car for the whole journey is
(a) 18 km/hr
(b) 24 km/hr
(c) 30 km/hr
(d) 36 km/hr
1795: Soils of Western Rajasthan have a high content of
(a) Aluminium
(b) Calcium
(c) Nitrogen
(d) Phosphorus