11.

The volume of 0.1 M H₂SO₄ that is needed to completely neutralise 30mL of 0.2 M NaOH solution, is

• 15mL

• 30mL

• 40mL

• 60mL

1 moles of crystalline NaCl will have how many unit cells ?

• 1.506 × 10²³

• 3.012 × 10²³

• 4.518 × 10²³

• 6.023 × 10²³

A mixture has 18g water and 414g ethanol. The mole fraction of water in mixture is (assume ideal behaviour of the mixture)

• 0.1

• 0.4

• 0.7

• 0.9

A chemical reaction is in equilibrium when

• the reactants are completely transformed into products

• the rate of forward reaction is equal to the rate of backward reaction

• the formation of products is minimised

• equal amount of reactants and products are present

For the following gaseous reaction, H₂ + I₂ $\rightleftharpoons$2HI, the equilibrium constant

• K_p > K_c

• K_p< K_c

• K_p= K_c

• K_p= 1/K_c

According to Le-Chatelier's principle which of the following factors influence a chemical system?

• Concentration only

• Pressure only

• Temperature only

• Concentration, pressure and temperature

The pH of water decreases with?

• increase in temperature

• increase in pressure

• decrease in temperature

• decrease in pressure

The aqueous solution of which one of the following is basic?

• HOCl

• NaHSO₄

• NH₄NO₃

• NaOCl

The pH of 10^-7 M NaOH is

• 7.01

• between 7 and 8

• between 9 and 10

• greater than 10

For an endothermic reaction where ΔH represents the enthalpy of the reaction in kJ/mol, the minimum value for the energy of activation will be

• less than ΔH 

• Zero

• more than ΔH 

• equal to ΔH