Mole Concept (Chapter Test - Non-Medical) - Class 12 MCQ

How many electrons are present in 2 x 10^-3 mol of 8¹⁸ O^2- ?

12.5 ml of a solution, containing 6.0 g of a dibasic acid in one litre, was found to be neutralized by 10 ml of decinormal solution of NaOH. The molecular weight of the acid is

An organic compound on analysis gave C = 42.8%, H = 7.20% and N = 50%. Volume of 1g of the compound was found to be 200mL at NTP. Molecular formula of the compound is

For the reaction, A + 2B→ C, 5 moles of A and 8 moles of B will produce

What volume of N/2 and N /10 HCI should be taken in order to make a 2 litre solution of N/5 strength ?

25 g of MCl₄ contains 0.5 mol chlorine, then its(MCl₄ ) molecular mass is

The formula of an acid is HXO₂. The mass of 0.0242 moles of the acid is 1.657 g. What is the atomic weight of X ?

Concentrated HNO₃ is 63% HNO₃ by mass and has a density of 1.4 g/mL. How many millilitres of this solution are required to prepare 250 mL of a 1.20 M HNO₃ solution ?

Suppose two elements X and Y combine to form two compounds XY₂ and X₂Y₃ when 0.05 mole of XY₂weighs 5 g while 3.011 x 10²³ molecules of X₂Y₃ weighs 85 g. The atomic masses of X and Y are respectively

Mole fraction of methanol in mixture of methanol and ethanol is 0.50. Hence the mass percentage of methanol in the mixture is

If we take 2.2 g of CO₂, 6.02 x 10²¹ atoms of nitrogen and 0.03 g atoms of sulphur, than the molar ratio of C, N and S atoms will be

0.2 mole of HCl and 0.2 mole of barium chloride were dissolved in water to produce a 500 mL solution. The molarity of the Cl^- ions is