NEET Practice Questions (MCQs) with Answers & Solutions

In Al₂Cl₆, Al has an incomplete octet. In Al₂(CH₃)₆, both Al and C have complete octets. In AlF₃, Al has an incomplete octet, while F has a complete octet. In the dimer of BeCl₂, Be has a complete octet, while Cl has an incomplete octet. In the dimer of BeH₂, both Be and H have incomplete octets.

(c)    Cl$—$Hg$—$Hg$—$Cl

    Mercurousion is represent as $Hg\stackrel{2+}{2}$ it is evidenced by the fact that its  $\mu$=0, i.e., it is diamagnetic. it is possible only when there is presence of a metal-matal bond.

(b) $K{O}_2$ is an ionic compound

(b) only P has d-orbitals. 

(d) (a) ${\mathrm{H}}_2....{\mathrm{H}}_2\mathrm{O}$               Dipole-induced dipole interaction (van der Waal's force) energy<8kJ/mol

(b) $\mathrm{H}—\mathrm{Cl}.....\mathrm{H}—\mathrm{CI}$         Dipole-dipole interaction (van der Waal's force)<8kJ/mol

(c) ${\mathrm{H}}_{2}0.....\mathrm{HF}$                      H-bond 

(d) all                

(d) In ${\mathrm{CDI}}_2$, Pink colour is due to polarization of ${\mathrm{I}}^{-} \mathrm{by} {\mathrm{Cd}}^{2+}$ has pseudo noble gas configuration. In ${\mathrm{CdCI}}_2$, extent of polarization of ${\mathrm{Cl}}^{- }\mathrm{by} {\mathrm{Cd}}^{2+}$ is relatively less, hence specific colour cannot be predicted.

(b)I3 + has a bent shape which is sp3 hybridized. The central atom iodine atom has 6 electrons because of one positive charge, it will make single bonds with 2 I atoms to complete their and it`s own octet, keeping the loan pair upside we get a bent shape.

(b) Due to $s{p}^2$- hybridization.

(c) Carbon cannot accept $6C{l}^{-}$, since it has no vacant d-orbitals.