The molecule which does not exhibit dipole moment is:

• NH₃

• CHCl₃

• H₂O

• CCl₄

2.

One mole of CO₂ contains:

• 3g atoms of CO₂

• 18.1 × 10²³ molecules of CO₂

• 6.02 × 10²³ atoms of O

• 6.02 × 10²³ atoms of C

Which of the following is isoelectronic with CO₂?

• NO₂

• NO

• N₂O

• N₂O₄

All bond angles are exactly equal to 109° 28' in:

• methyl chloride

• iodoform

• chloroform

• carbon tetrachloride

In an isochoric process, ΔH for a system is equal to:

• p.ΔV

• pV

• E+pΔV

• ΔE

The solubility of CaF₂ in pure water is 2.3 ×10^-6 mol dm^-3. Its solubility product will be:

• 4.8 ×10^-18

• 48.66 ×10^-18

• 4.9 ×10^-11

• 48.66 ×10^-15

Equal moles of water and urea are taken in a flask. What is mass percentage of urea in the solution?

• 23.077%

• 230.77%

• 2.3077%

• 0.23077%

Two moles of PCl₅ were heated in a closed vessel of 2 L. At equilibrium 40% of PCl₅ is  dissociated into PCl₃ and Cl₂.The,value of equilibrium constant is :

• 0.53

• 0.267

• 2.63

• 5.3

Volume of water needed to mix with 10 mL N HCl to get 0.1 N HCl is:

• 900mL

• 9mL

• 90mL

• 100mL

The pH value of 1/1000 N-KOH solution is :

• 3

• 10^-11

• 2

• 11