Calculate the equivalent weight of H₃PO₄ and Ca(OH)₂ on the basis of given reaction.
H₃PO₄ + NaOH \(\longrightarrow\) NaH₂PO₄ + H₂O
Ca(OH)₂ + HCI \(\longrightarrow\) Ca(OH)CI + H₂O

In Rutherford's experiment, generally thin foil of heavy atoms, like gold, platinum etc. have been used to bombard the a-particles. If the thin foil of light atoms like aluminum is used, what difference would be observed from the above results?

What are all the factors that influences electron gain enthalpy?

What causes the temporary and permanent hardness of water?

Explain the Castner-Kellner process of manufacturing sodium hydroxide.

Define the Heat of Transition

What is meant by boiling point and condensation point of the liquid?

Graphically prove that T_b is greater than T^o_b

Explain why BeH₂ molecule has a zero dipole moment although the Be - H bonds are polar.

Suggest and explain the method suitable to purify the organic compounds depending on their boiling points.