The following three objects (1) a metal tray, (2) a block of wood, and (3) a woolen cap are left in a closed room overnight. Next day the temperature of each is recorded as T1, T2 and T3 respectively. The likely situation is
option
(A) T1 = T2 = T3
(B) T3 > T2 > T1
(C) T3 = T2 > T1
(D) T3 > T2 = T1
MnO4
– oxidizes (i) oxalate ion in acidic medium at 333 K and and (ii) HCl. For balanced chemical
equations, the ratios [MnO4
– : C2O4
2–] in (i) and [MnO4
– : HCl] in (ii), respectively, are-
(A) 1 : 5 and 2 : 5 (B) 2 : 5 and 1 : 8 (C) 2 : 5 and 1 : 5 (D) 5 : 2 and 1 : 8
Let ABC be an equilateral triangle, let KLMN be a rectangle with K, L on BC, M on AC and N on AB.
Suppose AN/NB = 2 and the area of triangle BKN is 6. The area of the triangle ABC is-
(A) 54 (B) 108
(C) 48 (D) not determinable with the above data
In 1670, Robert Boyle conducted an experiment where in he placed a viper (a poisonous snake) in a chamber
and rapidly reduced the pressure in that chamber. Which of the following would be true ?
(A) Gas bubbles developed in the tissues of the snake
(B) The basal metabolic rate of the snake increased tremendously
(C) The venom of the snake was found to decrease in potency
(D) The venom of the snake was found to increase in potency
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
The difference between a two-digit number and the number obtained by interchanging the digits is 36. What is the difference between the sum and the difference of the digits of the number if the ratio between the digits of the number is 1 : 2 ?
frank
In mathematics the art of proposing a question must be held of higher value than solving it.
...Georg Cantor ( inventor of set theory)