List of top Chemistry Questions on Gas Laws asked in ICSE Class X board

(Zn + 4HNO_3 Zn(NO_3)_2 + 2H_2O + 2NO_2) 
32.5 g of zinc reacts with concentrated nitric acid as given in the above equation. 

(a) How many moles of zinc was required in the reaction? 
(b) Find the mass of nitric acid needed to react with 32.5 g of zinc. 
(c) Find the volume of nitrogen dioxide liberated in (b). 
(Atomic weight: H = 1, N = 14, O = 16, Zn = 65) 
 

Differentiate between the following pairs based on the criteria given in the bracket:
(a) Acetic acid and Sulphuric acid (number of replaceable hydrogen ion per molecule)
(b) Electrolyte and Metallic conductor (the particles conducting electricity)
What volume of carbon dioxide is produced at STP when 5 litres of propane is burnt completely according to the equation given below?
[ C_3H_8 + 5O_2 3CO_2 + 4H_2O ]