19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
A certain compound has the molecular formula \(\mathrm{X_4O_6}\) if 10 g of \(\mathrm{X_4O_6}\) has 5.72 g of X, atomic mass of X is :
On reduction with hydrogen, 3.6 g of an oxide of metal left 3.2 g of the metal. If the atomic weight of the metal is 64, the simplest formula of the oxide would be
Two flasks of equal volumes are evacuated, then one is filled with gas A and other with gas B at the same temperature and pressure. The weight of B was found to be 0.80 gm while the weight of gas A is found to be 1.40…
\(\mathrm{N_2}\) and \(\mathrm{H_2}\) are mixed in 14:3 mass ratio. After certain time ammonia was found to be 40% by mol. The mole fraction of \(\mathrm{N_2}\) at that time in the mixture of \(\mathrm{N_2}\) \(\mathr…
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…
2.7 g of \(\mathrm{Ag_2CO_3}\) on being heated strongly yields a residue weighing
Irrespective of the source, pure sample of water always yields 88.89% mass of oxygen and 11.11% mass of hydrogen. This is explained by the law of: