A 5 molar solution of H₂SO₄ is diluted from 1 L to 10 L. What is the normality of the solution ?

• 0.25 N

• 1 N

• 2 N

• 7 N

The pH of the solution 5 mL of M/5 HCl + 10 mL of M/10 NaOH is

• 5

• 3

• 7

• 8

If the heat of formation of CO2 is -393 kJ. The amount of heat evolved in the formation of 0.176 kg of CO₂ is

• -1357.9kJ

• -1275.9kJ

• -1572.0kJ

• -1165.5kJ

In a nuclide, one a.m.u. of mass is dissipated into energy to bind its nucleons. The energy equivalent of this mass is

• 931.5 eV

• 931.5 × 10⁶ eV

• 931.5 × 10⁶ MeV

• 931.5 MV

What is the volume (in litres) of oxygen at STP required for complete combustion of 32 g of CH₄?

(Molecular weight of CH₄ is 16)

• 44.8

• 89.6

• 22.4

• 179.2

250 mL of a sodium carbonate solution contains 2.65 g of Na₂CO₃. If 10 mL of this solution is diluted to one litre, what is the concentration of the resultant solution ?

• 0.1 M

• 0.001 M

• 0.01 M

• 10^-4 M

How many litres of oxygen (at STP) are required for complete combustion of 39 g of liquid benzene? (Atomic weights: C = 12, O = 16, H = 1).

• 84

• 22.4

• 42

• 11.2

108.

X litre of carbon monoxide is present at STP. It is completely oxidized to CO₂. The volume of CO₂ formed is 11.207 litres. What is the value of X in litres?

• 22.414

• 11.207

• 5.6035

• 44.828

What is the volume (in litres) of oxygen required at STP to completely convert 1.5 mol of sulphur into sulphur dioxide?

• 11.2

• 22.4

• 33.6

• 44.8

The concentration of a 100 mL solution containing X g of Na₂CO₃ (molecular wt. = 106) is Y M. The values of X and Y are respectively.

• 2.12, 0.05

• 1.06, 0.2

• 1.06, 0.1

• 2.12, 0.1