19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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
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).