1.

State whether the following statements are true or false. If statement is false, correct it.i) In polar compounds the electropositive atom attracts the electron pair towards it.ii) Hydrogen chloride gas is a di-polar molecule.iii) Covalent compounds are generally gases due to presence of weak electrostatic forces of attraction.iv) Atoms achieve stable electronic configuration only by transfer of electrons from one atom to another.v) Ionic compounds are soft, solids or liquids at ordinary temperature.

Answer»

i) This statement is wrong. In polar compounds the more electronegative atom attracts the electron pair towards it which is known as electronegativity.

ii) Chlorine is more electronegative than Hydrogen. So the electron pair shifts more towards chlorine atom. Thus partial positive charge is formed on Hydrogen and partial negative charge is formed on Chlorine. So it is dipolar molecule. So the statement is true.

iii) This statement is false. The forces are not electrostatic and also they are weak.

iv) This statement is false because they can acquire by not only electron transfer but also mutually sharing of electrons.

v) This statement is false because ionic compounds are generally hard solids.



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