Revision Quiz | Mole Concept and Stoichiometry for JEE & BITSAT Exams

Question 1

The empirical formula of a nonelectrolyte is CH₂O. A solution containing 3 g of the compound exerts the same osmotic pressure as that of 0.05 M glucose solution. The molecular formula of the compound is

Question 2

The percentage of hydrogen in water and hydrogen peroxide is 11.1 and 5.9% respectively. These figures illustrate

Question 3

Two metallic oxides contain 27.6% and 30.0% oxygen respectively. If the formula of first oxide is M₃O₄, then that of second oxide will be:

Question 4

What is the concentration of nitric acid in a sample of density, 1.41 g/mL and mass percent of nitric acid in it being 69%?

Question 5

Density of methanol is 0.793 kg L^-1, what volume is needed for making 2.5 L of its 0.25 M solution?

Question 6

Three successive measurements in an experiment gave the values 10.9, 11.4042 and 11.42. The correct way of reporting the average value is

Question 7

The sulphate of a metal M contains 9.87% of M. This sulphate is isomorphous with ZnSO₄.7H₂O.The atomic mass of M is:

Question 8

The vapour density of gas A is four times that of B. If molecular mass of B is M, then molecular mass of A is:

Question 9

An organic compound having molecular mass 60 is found to contain C = 20%, H = 6.67% and N = 46.67% while rest is oxygen. On heating it gives NH₃ along with a solid residue. The solid residue give violet colour with alkaline copper sulphate solution. The compound is

Question 10

10 ml of an aqueous solution containing 222 mg of calcium chloride (mol. wt.=111) is diluted to 100 ml. The concentration of chloride ion in the resulting solution is

Question 11

LiOH reacts with CO2 to form Li₂CO₃(atomic mass of Li=7). The amount of CO₂(in g) consumed by 1 g of LiOH is closest to

Question 12

10 g of a mixture of BaO and CaO requires 100 cm³ of 2.5 A HCl to react completely. The percentage of calcium oxide in the mixture is approximately
(Given : molar mass of BaO = 153)

Question 13

1.25 g of a metal (M) reacts with oxygen completely to produce 1.68 g of metal oxide. The empirical formula of the metal oxide is
[molar mass of M and O are 69.7 g mol^–1 and 16.0 g mol^–1, respectively]

Question 14

125 mL of 10% NaOH (w/V) is added to 125 mL of 10% HCl (w/V). The resultant solution becomes-

Question 15

The amount of oxygen in 3.6 moles of water is :