NEET Practice Questions (MCQs) with Answers & Solutions

-Bond dissociation energy of F₂ is less than that of Cl₂

-Cl has higher E.A. than fluorine

-HF is weaker acid than HCl, due to higher bond energy

(c) NH₄Cl+ NaNO₂→NH₄NO₂+NaCl
NH₄NO₂ $\stackrel{∆}{\to }$ N₂↑ +2H₂O

Ba(N₃)₂ →Ba+3N₂↓ 
2NH₄Cl+CaO→CaCl₂+2NH₃↑+H₂O)

$\stackrel{+3}{\mathrm{N}}{\mathrm{O}}_2^{-}\stackrel{\mathrm{Oxidation}}{\to }\stackrel{+5}{\mathrm{N}}{\mathrm{O}}_3^{-}$

(a) H₃BO₃ acts as weak monobasic Lewis acid.

(i) B(OH)₃ + NaOH  $\to$Na[B(OH)₄] 

on addition of cis 1,2 diol in H3bo3 solution, acidic strength of H₃BO₃ increases due to chelation effect.

Bond dissociation energy $\propto \frac{1}{\mathrm{Bond} \mathrm{Length}}$

Order of bond length: P-O > S-O >Cl- O Order of BDE: Cl-O> S-O>P-O

$\left(3\right) 2{\mathrm{NO}}_2+{\mathrm{H}}_2\mathrm{O}\to {\mathrm{HNO}}_3+{\mathrm{HNO}}_2$

$$\begin{gathered} \left(2\right) {\mathrm{PCl}}_3+3{\mathrm{H}}_2\mathrm{O}\to {\mathrm{H}}_3{\mathrm{PO}}_3+3\mathrm{HCl} \\ {\mathrm{H}}_3{\mathrm{PO}}_3 \mathrm{is} \mathrm{a} \mathrm{diabasic} \mathrm{acid}. \end{gathered}$$

 NO  and NO₂ are paramagnetic in nature