436: Which one of the following is the correct sequence of a food chain?
(a) Diatoms-Crustaceans-Herrings.
(b) Crustaceans-Diatoms-Herrings.
(c) Diatoms-Herrings-Crustaceans.
(d) Crustaceans-Herrings-Diatoms.
437: Consider the following chemicals :
1. Benzene
2. Carbon tetrachloride
3. Sodium Carbonate
4. Trichloroethylene
Which of the above is/are used as dry cleaning chemicals ?
(a) 1 Only
(b) 2 Only
(c) 1, 2 and 4 Only
(d) 1, 2, 3 and 4
438: 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
439: The Security council of UN consists of 5 permanent members, and the remaining 10 members are elected by the General Assembly for a term of
(a) 1 year
(b) 2 years
(c) 4 years
(d) 5 years
440: Ibadat Khana at Fatehpur Sikri was
(a) the mosque for the use of Royal Family
(b) Akbar's private prayer chamber
(c) the hall in which Akbar held discussions with scholars of various religions
(d) the room in which the nobles belonging to different religions gathered to discuss religious affairs.