Chemistry Question Bank

For the reaction A + 2B C + 3D, 5 moles of A and 8 moles of B will produce

0.5 mole of \(\mathrm{H_2SO_4}\) is mixed with 0.2 mole of Ca(OH)₂. The maximum number of mole of \(\mathrm{CaSO_4}\) formed is

If 0.5 mol of \(\mathrm{BaCl_2}\) is mixed with 0.2 mol of \(\mathrm{Na_3PO_4}\) the maximum number of mol of \(\mathrm{Ba_3PO_4}\) that can be formed is

A 10.0 g sample of a mixture of calcium chloride and sodium chloride is treated with \(\mathrm{Na_2CO_3}\) to precipitate the calcium as calcium carbonate. This \(\mathrm{CaCO_3}\) is heated to convert all the calcium…

Calculate the weight of iron which will be converted into its oxide by the action of 18g of steam on it. .

The percent loss in weight after heating a pure sample of \(\mathrm{KClO_3}\) (molecular weight = 122.5) will be

If 1 mole of ethanol \(\mathrm{C_2H_5OH}\) completely burns to \(\mathrm{CO_2}\) and \(\mathrm{H_2O}\) the weight of \(\mathrm{CO_2}\) formed is about.

2.7 g of \(\mathrm{Ag_2CO_3}\) on being heated strongly yields a residue weighing

In an experiment, it is found that 2.0769 g of Pure X produces 3.6769 g of pure \(\mathrm{X_2O_5}\) The number of moles of X is

If two mole of methanol \(\mathrm{CH_3OH}\) completely burns to carbon dioxide and water, the weight of water formed is about

How many grams of phosphoric acid \(\mathrm{H_3PO_4}\) would be needed to neutralise 100 g of magnesium hydroxide (Mg(OH)₂).

2 mol of \(\mathrm{H_2S}\) and 11.2 L \(\mathrm{SO_2}\) at N.T.P. reacts to form x mol of sulphur; x is

What quantity of limestone \(\mathrm{CaCO_3}\) on heating will give 56 Kg of CaO?

The chloride of a metal contains 71% chlorine by weight and the vapour density of it is 50. The atomic weight of the metal will be

The hydrated salt \(\mathrm{Na_2SO_410H_2O}\) undergoes X% loss in weight on heating and becomes anhydrous. The value of X will be

The simplest formula of a compound containing 50% by mass of element X (at. wt. 10) and 50% by mass of element Y (at. wt. 20) is ;

The total number of protons in 8.4 g of \(\mathrm{MgCO_3}\) is (NA = 6.021023) :

A person adds 3.42 of sucrose \(\mathrm{C_12H_22O_11}\) in his cup of tea to sweeten it. How many atoms of carbon does he add?

If NA is Avogadro’s number, then the number of valence electrons in 4.2 g of nitride ion () is (Given One atom of N has 5 valence electrons)

The number of water molecules present in a drop of water weighing 0.018 g is

The number of molecules of water in 333 g of \(\mathrm{Al_2SO_4H_2O}\) is

The no. of silver atoms present in a 90% pure silver wire weighing 10 g. is (at.wt. of Ag=108)

How many molecules of \(\mathrm{H_2O}\) are contained in 2.48 g of \(\mathrm{Na_2S_2O_3H_2O}\) (at.wt. of Na=23,S=32)

How many electrons are present in 180 gm. of water

The largest no. of molecules is in