Structure of ammonia is

• pyramidal

• tetrahedral

• trigonal

• trigonal pyramidal

Which of the following contains both covalent and ionic bond ?

• CCl₄

• CaCl₂

• NH₄Cl

• H₂O

The bond energy is the energy required to

• dissociate one mole of the substance

• dissociate bond in 1 kg of the substance

• break one mole of similar bonds

• break bonds in one mole of substance

For the reaction,

$2{\mathrm{H}}_2\left(\mathrm{g}\right) + {\mathrm{O}}_2\left(\mathrm{g}\right) \to 2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{g}\right), ∆\mathrm{H}°= - 573.2 \mathrm{kJ}$

The heat of decomposition of water per mole is

• 286.6 kJ

• 573.2 kJ

• -28.66 kJ

• Zero

5.

For an ideal gas, the heat of reaction at constant pressure and constant volume are related as

• H + E = pV

• $\mathrm{E} = \mathrm{H} + \mathrm{p}∆\mathrm{H}$

• ${\mathrm{q}}_{\mathrm{p}} = {\mathrm{q}}_{\mathrm{v}} + ∆\mathrm{nRT}$

• None of the above

Hess's law is based on

• law of conservation of mass

• law of conservation of energy

• first law of thermodynamics

• None of the above

Which of the following is a path function?

• Internal energy

• Enthalpy

• Work

• Entropy

The pH of a 10^-8 molar solution of HCl in water is

• 8

• between 7 and 8

• between 6 and 7

• None of these 

The solubility of AgCl is 1 x 10^-5 mol/L. Its solubility in 0.1 molar sodium chloride solution is

• $1 \times {10}^{-10}$

• $1 \times {10}^{-5}$

• $1 \times {10}^{-9}$

• $1 \times {10}^{-4}$

When ammonium chloride is added to ammonia solution, the pH of the resulting solution will be

• increased

• seven

• decreased

• unchanged