Test: Mole Concept, Volumetric & Redox - 3 - Chemistry MCQ

2.76 g of silver carbonate on being strongly heated yields a residue weighing

If 0.5 mol of BaCl2 is mixed with 0.20 mol of Na3PO4, the maximum amount of Ba3(PO4)2 that can be formed is

A molal solution is one that contains one mole of solute in

Which of the following changes with increase in temperature:

How many moles of electron weighs one kilogram?

Which has maximum number of atoms?

Given that the abundances of isotopes ₅₄Fe, ₅₆Fe and ₅₇Fe are 5%, 90% and 5% respectively, the atomic mass of Fe is

Dissolving 120 g of urea (mol. Wt. 60) in 1000 g of water gave a solution of density 1.15 g/mL. The molarity of the solution is

The hydrated salt Na₂CO₃.x H₂O undergoes 63% loss in mass on heating and becomes anhydrous. The value of x is

The volume of chlorine at STP required to liberate all the bromine and iodine in 100 mL of 0.1 M each of KI and MBr₂ will be:

0.5400 g of a metal X yields 1.020 g of its oxide X₂O₃. The number of moles of X is:

Consider the reaction 2A + B + 3C → P + 2Q. Starting with 3 mol of A, 2 mol of B and 6 mol of C, number of moles of the products P and Q would respectively be:

A mixture of methane and ethane in the mole ratio of x : y has a mean molecular mass equal to 20. What would be the mean molecular mass of a mixture of the same gases present in the ratio y : x?

A partially dried clay mineral contains 8% water. The original sample contained 12% water  and 45% silica. The percentage of silica in the partially dried sample is nearly

H₂O₂ in aqueous solution decomposes on warming as: 2H2O_2(aq) → 2H₂O_(l) + O_2(g) If 1 mole of gas occupies a volume of 25 L under the conditions of measurement and 200 ml of x M solution of H₂O₂ produces 5L of O₂, the value of x is

5.0 g of a certain element X forms 10.0 g of its oxide having the formula X₄O₆. The atomic mass of X is

Charcoal (1 g) of surface area 100 m² per gram, adsorbs 60 mg of acetic acid from an aqueous solution at 25°C and 1 atmosphere pressure. The number of moles of acetic acid adsorbed per cm² of charcoal surface is:

The ionic strength of 0.1 M aqueous solution of Fe₂(SO₄)₃ is:

In the following sequence of reactions, the overall yield (%) of O is:

Number of atoms in 558.5 g Fe (at. wt. 55.85) is:

In a compound C, H, N atoms are present in 9 : 1 : 3.5 by weight. Molecular weight of compound is 108. Its molecular formula is:

What volume of hydrogen gas at 273 K and 1 atm pressure will be consumed in obtaining 21.6 g of elemental boron (at. mass = 10.8) from the reduction of boron trichloride with hydrogen:

25 mL of a solution of barium hydroxide on titration with 0.1 molar solution of hydrochloric acid gave a titre value of 35 mL. The molarity of barium hydroxide is:

6.02 × 10²⁰ molecules of urea are present in 100 mL solution. The concentration of urea solution is:

To neutralize completely 20 mL of 0.1 M aqueous solution of phosphorus (H₃PO₃) acid the volume of 0.1 M aqueous KOH solution required is:

Two solution of a substance (non-electrolyte) are mixed in the following manner,480ml of 1.5M of first solution with 520 ml of 1.2m of second solution.The molarity of final solution is

If 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will: