971: Which one of the following figures will generate a cone when rotated about one of its straight edges ?
(a) An equilateral triangle
(b) A sector of a circle
(c) A segment of a circle
(d) A right-angled triangle
972: What is the tissue culture?
(a) Preparation of fragments of the cells of organism for biochemical examination
(b) Japanese culture
(c) Name given to a special type of surgery
(d) None of the above
973: What is the principle by which a cooling system (Radiator) in a motor car works ?
(a) Convection
(b) Conduction only
(c) Both conduction and radiation
(d) Radiation only
974: Six persons M, N, O, P, Q and R are sitting in two rows, three in each. Q is not at the end of any row. P is second to the left of R, O is the neighbour of Q and is sitting diagonally opposite to P. N is the neighbour of R. On the basis of above information, who is facing N ?
(A) R
(B) Q
(C) P
(D) M
975: Which one of the following is an active component of oil of clove ?
(a) Menthol
(b) Eugenol
(c) Methanol
(d) Benzaldehyde