A solution containing 8.0 g of nicotine in 92 g of water freezes 0.925 degrees below the normal freezing
point of water. If the molal freezing point depression constant Kf = – 1.85ºC mol–1 then the molar mass of
nicotine is-
(A) 16 (B) 80 (C) 320 (D) 160
Consider the regions A = {(x, y) | x^2 + y^2 ≤ 100} and = {(x, y) | sin (x + y) > 0} in the plane. Then the area
of the region A ∩ B is-
(A) 10 π (B) 100 (C) 100 π (D) 50 π
Vibrio cholerae causes cholera in humans. Ganga water was once used successfully to combat the infection. The
possible reason could be–
(A) High salt content of Ganga water
(B) Low salt content of Ganga water
(C) Presence of bacterophases in Ganga water
(D) Presence of antibiotics in Ganga Water
A bus driving along at 39.6 kmph is approaching a person who is standing at the bus stop, while honking
repeatedly at an interval of 30 seconds. If the speed of the sound is 330 m/s, at what interval will the person
hear the horn ?
(A) 31 seconds
(B) 29 seconds
(C) 30 seconds
(D) the interval will depend on the distance of the bus from the passenger
Modern evolutionary theory consists of the concepts of Darwin modified by knowledge concerning-
(A) population statistics (B) Mendel's laws
(C) the idea of the survival of the fittest (D) competition