2731: Which one of the following is the process involved in photosynthesis ?
(a) Potential energy is released to form free energy
(b) Free energy is converted into potential energy and stored
(c) Food is oxidized to release carbon dioxide and water
(d) Oxygen is taken, and carbon dioxide and water vapour are given out
2732: Which of the following crops helps in nitrogen fixation?
(a) Rice
(b) Wheat
(c) Maize
(d) Beans
2733: The basic reason for the extraordinary sparkle of a suitably cut diamond is that
(a) it has a very high transparency
(b) it has a very high refractive index
(c) it is very hard
(d) it has well-defined cleavage planes
2734: Who among the following Governor Generals created the Covenanted Civil Service of India which later came to be known as the Indian Civil Service ?
(a) William Bentinck
(b) Warren Hastings
(c) Wellesley
(d) Cornwallis
2735: otal time taken by a person in going to a place by walking and returning on cycle is 5 hours 45 minutes. He would have gained 2 hours by cycling both ways. The time taken by him to walk both ways is
(a) 6 hours 45 minutes
(b) 7 hours 45 minutes
(c) 8 hours 15 minutes
(d) 8 hours 30 minutes