A liquid is in equilibrium with its vapour at it's boiling point. On the average, the molecules in two phases have equal

• inter- molecular forces

• potential energy

• kinetic energy

• total energy

For the chemical reaction 3X(g)+ Y(g)$\rightleftharpoons$ X₃Y (g), the amount of X₃Y at equilibrium is affected by

• temperature and pressure

• temperature only

• pressure only

• temperature, pressure and catalyst

The pair of compound which cannot exists together in solution is

• NaHCO₃ and NaOH

• Na₂CO₃ and NHCO₃

• Na₂CO₃ and NaOH

• NaHCO₃ and NaCl

Which has maximum number of atoms ?

• 24 g of C

• 56 g of Fe

• 26 g of Al

• 108 g of Ag

In homogeneous catalysis

• the reactants, catalyst and products are in the same phase.

• the catalyst and reactants are in the same phase.

• the catalyst and products are in the same phase.

• the reactants and products are in the same phase.

Which of the following has the smallest number of molecules ?

• 0.1 mole of CO₂ gas

• 11.2 L of CO₂ gas at STP

• 22 g of CO₂ gas

• 22.4 x 10³ mL of CO₂ gas at STP

4.6 x 10²² atoms of an element weigh 13.8g. The atomic weight of that element is

• 290

• 180

• 34.4

• 10.4

Which one ofthe following compounds has sp² hybridisation ?

• CO₂

• SO₂

• N₂O

• CO

9.

Identify the least stable ion amongst the following.

• Li^-

• Be^-

• B^-

• C^-

Number of lone pair (s) in XeOF₄ is/are

• 0

• 2

• 1

• 3