Chemistry Question Bank

Which of the following has greatest no. of oxygen atoms

The element A at wt.=75 and B at wt. =32 combine to form a compound X. If 3 mol of B combine with 2 mol of A to give 1 mol of X, the weight of 5 mol of X is

A sample contains 200 atoms of hydrogen, 0.05 gm atom of nitrogen, 1020 gm atom of oxygen. What is the approximate no. of total atoms

Maximum no. of hydrogen atoms are in:

A mixture of KBr and NaBr weighing 0.560 gm was treated with aqueous Ag⁺ and all the bromide ion was recovered as 0.970 gm of pure AgBr. The weight of KBr in the sample is

8 g of sulphur is burnt to form \(\mathrm{SO_2}\) which is oxidised by \(\mathrm{Cl_2}\) water. The solution is treated with \(\mathrm{BaCl_2}\) solution. The amount of \(\mathrm{BaSO_4}\) precipitated is

If half mole of oxygen gas combine with Al to form , the weight of Al used in the reaction is:

25.0 ml of HCl solution gave, on reaction with excess solution of . The molarity of HCl solution is

Calcium carbonate reacts with aqueous to give according to the reaction, . The mass of required to react completely with of is

of a hydrocarbon requires of for complete combustion. Calculate value of?

How many gms of copper would be displaced from the copper sulphate solution by adding 27 gm of aluminium

10 moles and of were allowed to react over a suitable catalyst. 10 moles of were formed. The remaining moles of and respectively are:

The density of a sulphuric acid solution that is (molar mass ) by mass will be:

One mole of potassium chlorate is thermally decomposed and excess of aluminium is burnt in the gaseous product. How many mole of aluminium oxide are formed:

250 ml of a sodium carbonate solution contains 2.65 grams of \(\mathrm{Na_2CO_3}\) If 10 ml of this solution is diluted to one litre, what is the concentration of the resultant solution? (mol wt. of \(\mathrm{Na_2CO_3…

The number of H⁺ ions present in 100 ml of 0.001M \(\mathrm{H_2SO_4}\) solution will be

50 ml of 0.01 M \(\mathrm{FeSO_4}\) will react with what volume of 0.01 M \(\mathrm{KMnO_4}\) solution in acid medium?

20 ml of 0.2 M \(\mathrm{Al_2SO_4}\) is mixed with 20 ml of 0.6 M \(\mathrm{BaCl_2}\) Concentration of \(\mathrm{Al_3}\) ion in the solution will be

Molarity of 1g \(\mathrm{H_2SO_4}\) solution in 1 lit. water is nearly

An aqueous solution of urea containing 18 g urea in 1500 cc of solution has a density of 1.052 g/cc. If the mol.wt. of urea is 60, then the molality of solution is

A gaseous oxide contains 30.4% of nitrogen, one molecule of which contains one nitrogen atom. The density of the oxide relative to oxygen gas is

The density of chlorine relative to air as mentioned in above problem is

Vapour density of air is (considering air as 80% and )

Consider the reaction 2A 2B, B 2C, 3C 4D. The no. of moles of D formed starting 4 moles of A, are

2.4 kg of carbon is made to react with 1.35 kg of aluminium to form \(\mathrm{Al_4C_3}\) The maximum amount in kg of aluminium carbide formed is