Specific gravity on API scale is given by the relation(where, G = specific gravity at 15.5°C). °API = (141.5/G) - 131.5 °API = (140/G) - 130 °API = 145 - (145/G) °API = 200(G - 1) TRUE ANSWER : ? YOUR ANSWER : ?
Disappearance of snow in subzero weather exemplifies the process of Evaporation Sublimation Melting Vaporisation TRUE ANSWER : ? YOUR ANSWER : ?
If the pH value of a solution changes by one unit, it implies that hydrogen ion concentration in the solution will change __________ times. 10 20 100 70 TRUE ANSWER : ? YOUR ANSWER : ?
The number of H⁺ in 1 c.c solution of pH 13 is 10¹³ 6.023xl0⁷ 6.023 x 10¹⁰ 6.023 xl0¹³ TRUE ANSWER : ? YOUR ANSWER : ?
Saturated solution of benzene in water is in equilibrium with a mixture of air and vapours of benzene and water at room temperature and pressure. Mole fraction of benzene in liquid is xB and the vapour pressures of benzene and water at these conditions are PvB and Pvw respectively. The partial pressure of benzene in air-vapour mixture is (Patm - Pvw)xB XB.PvB XB.Patm PvB TRUE ANSWER : ? YOUR ANSWER : ?
Heat of reaction is not influenced by Whether the reaction is carried out at constant temperature or constant pressure The route/method through which final products are obtained None of these The physical state (e.g., solid, liquid or gaseous) of reactants and products TRUE ANSWER : ? YOUR ANSWER : ?
The molecular velocity of a real gas is proportional to (where, T = absolute temperature of the gas). 1/√T √T T² T TRUE ANSWER : ? YOUR ANSWER : ?
The weight fraction of methanol in an aqueous solution is 0.64. The mole fraction of methanol XM satisfies XM ≥ 0.64 XM = 0.5 XM < 0.5 0.5 < XM < 0.64 TRUE ANSWER : ? YOUR ANSWER : ?
Air at a temperature of 20°C and 750 mm Hg pressure has a relative humidity of 80%. What is its percentage humidity?Vapour pressure of water at 20°C is 17.5 mm Hg. 80.38 80 79.62 78.51 TRUE ANSWER : ? YOUR ANSWER : ?