Category «Engineering Chemistry»

SOLUTIONS – 8

1) In a pair of immiscible liquids, a common solute dissolves in both and the equilibrium is reached, then the concentration of the solute in the upper layer is a) In a fixed ratio with that in the lower layer b) Same as the lower layer c) Lower than the lower layer d) Higher than …

SOLUTIONS – 7

1) The vapour pressure of a solution of 5 g of non-electrolyte in 100 g of water at a particular temperature is . The vapour pressure of pure water at that temperature is . The molecular weight of the solute is a) 180 b) 90 c) 270 d) 200 2) The vapour pressure of a …

SOLUTIONS – 6

1) The normality of 2 M sulphuric acid is a) 2 N b) 4 N c) N/2 d) N/4 2) How many grams of a dibasic acid (mol. wt.=200) should be present in 100 ml of its aqueous solution to give decinormal strength? a) 1 g b) 2 g c) 10 g d) 20 g …

SOLUTIONS – 5

1) The conjugate base of a strong acid is a base which is a) feeble b) weak c) strong d) weak or strong depending upon the strength of acid 2) The ion Na+, K +, Mg2+ etc are easily extracted into water. Such ions have their charge/size ratio a) <4 b) >4 c) <1 d) …

ATOMIC STRUCTURE – 1

1) The ratio of r.m.s velocity, average velocity and most probable velocity are in the ratio a) 1.224 : 1.128 : 1 b) 1 : 1.224 : 1.128 c) 1.128 : 1.224 : 1 d) 1 : 1.128 : 1.224 2) 93.75 % of a radioactive material disintegrates in 400 days. How long will it …

CHEMICAL THERMODYNAMICS – 3

1) If 900 J/g of heat is exchanged at the boiling point of water, then what is the increase in entropy ? a) 43.4 J / mole b) 87.2 mole c) 900 J / mole d) zero 2) For an ideal gas, the relation between the enthalpy change and the internal energy change at constant …

CHEMICAL THERMODYNAMICS – 2

1) For the precipitation reaction of Ag+ ions with NaCl, which of the following statements is correct ? a) b) c) d) 2) The sign of DG for the process of melting of ice at 273 K and 1atm pressure is a) Positive b) Negative c) Neither positive nor negative d) Either positive or negative …