Chemical Bonding and Atomic Structure MCQs for NEET — Chemistry Questions with Answers

(b) Due to inter electronic repulation between lone pairs on both oxygen atoms bond energy of $\mathrm{O}—\mathrm{O}$

     bond is less.

(d) HCL is highly in water because it ionise in water and form ion-dipole interaction with water 

(a) Aqueous hydrolysis of ${\mathrm{CCl}}_4$ is not possible due to absence of vacant ortibal on carbon, while

     hybrolysis of ${\mathrm{MgCl}}_2<{\mathrm{AlCl}}_3<{\mathrm{SiCl}}_4<{\mathrm{PCl}}_5$ is possible. Extent of hydrolysis is proportional to the

     amount of positive formation charge present on the atomic site prone to attack of ${\mathrm{H}}_2\mathrm{O}$ 

     molecules.  ${\mathrm{CCl}}_4<{\mathrm{MgCl}}_2<{\mathrm{AlCl}}_3<{\mathrm{SiCl}}_4<{\mathrm{PCl}}_5$

(c) Among given soild , molecular soild is weak , hence ,it has low melting point 

(c) London dispersion force molecular mass of covalent molecule 

(b) HCl has least boiling point among all halogen acids because it contains  V.W. force never contains H-bond  HCl < HBr < HI < HF .

Only HF has hydrogen bonding rest all have V.W. force of attraction. 

(d) Correct order of B.P

     $C{H}_3{N}_3<H{N}_3$

  Among $C{H}_3{N}_3$ there are dipole-dipole interaction while among $H{N}_3$ intermolecular H- bonding occurs. 

(d) $C_2{H}_6 < C{H}_3 - OH < KCL < Si$

( molecular lattice) ( molecular lattice ( Ionic lattice) (covalent lattice)

                               with H-bonding)