Chemistry Mole Concept Quiz for IIT-JEE

For the reaction, A + 2B → C, 5 moles of A and 8 mole of B will produce :

What volume of CO₂ at STP will evolve when 1 gram of CaCO₃ reacts with excess of dil HCl?

CaCO₃  +  HCl  → CaCl₂  +  H₂O  +  CO₂

Insulin contains 3.4% sulphur. The minimum molecular weight of insulin is  (S = 32)

A sample of Ca₃(PO₄)₂ contains 3.1g phosphorus, the weight of Ca in the sample is (Ca = 40,  P = 31)

Which has the highest mass :

11.2L of a gas at STP weighs 14g. The gas could be

The total number of protons in 10 gm of calcium carbonate is

The number of molecules present in a drop of water (having volume  = 0.05 ml, density of water 1gm/mol). are

The largest number of molecule is in

Which of  the following has smallest number of molecules?