Question:1 At 300K and 1 atm 15 mL of a gaseous hydrocarbon requires 375 mL air containing 20% O_2 by volume for complete combustion. »

Question:1 If  f(x)+2f(1/x)=3x, x!=0  and S= {x inR: f(x)= f(-x)};then S; (1) is an empty set »

Question 1: A student measures the time period of 100 oscillations of a simple pendulum four times. The data set is 90s, 91s, 95 s and »

Question  A ->  Products [:Zero order] B ->  Products [:First order] For what initial concentration of A are the half lives of two reactions equal? [Both »

Question Two second after projection, a projectile is moving at 30^0 above the horizontal; after one more second it is moving horizontally. Then: a) Angle »

Question: A thin prism P_1 of angle 4^0, and made from a glass of refractive index 1.54, is combined with another thin prism »

Question At what height from the earth does the acceleration due to gravity falls to 1% that of the surface a) 9R b) 10R d) 100R! »

Question When an electron of H-atom jumps from a higher to lower energy state, then: a) Its potential energy decreases b) Its kinetic energy increases c) »

Question Let a_1 and a_2 be their linear accelerations then: a) a_1 = a_2 b) a_1 > a_2 c) a_1 < »

Question: P and Q are two elements which forms P_2Q_3 and PQ_2. If 0.15 mole of P_2Q_3 weights !!15.9g! »