31.

A lead storage battery is discharged. During the charging of this battery, the reaction that occurs at anode, is

• ${\mathrm{PbSO}}_4 \left(\mathrm{s}\right) + 2{\mathrm{e}}^{-} \to \mathrm{Pb}\left(\mathrm{s}\right) +\hspace{0.17em}{\mathrm{SO}}_4^{2-}\left(\mathrm{aq}\right)$

• ${\mathrm{PbSO}}_4 \left(\mathrm{s}\right) + 2{\mathrm{H}}_2\mathrm{O} \to {\mathrm{PbO}}_2\left(\mathrm{s}\right) +\hspace{0.17em}{\mathrm{SO}}_4^{2-}\left(\mathrm{aq}\right)+ 4{\mathrm{H}}^{+}\left(\mathrm{aq}\right) + 2{\mathrm{e}}^{-}$

• ${\mathrm{PbSO}}_4 \left(\mathrm{s}\right) \to {\mathrm{Pb}}^{2+}\left(\mathrm{aq}\right) +\hspace{0.17em}{\mathrm{SO}}_4^{2-}\left(\mathrm{aq}\right)$

• ${\mathrm{PbSO}}_4 \left(\mathrm{s}\right) +2{\mathrm{H}}_2\mathrm{O} + 2{\mathrm{e}}^{-} \to {\mathrm{PbO}}_2\left(\mathrm{s}\right) +\hspace{0.17em}{\mathrm{SO}}_4^{2-}\left(\mathrm{aq}\right)+ 2{\mathrm{H}}^{+}\left(\mathrm{aq}\right)$

$$\begin{gathered} \mathrm{For} \mathrm{the} \mathrm{reaction}, \\ 5{\mathrm{Br}}^{-}\left(\mathrm{aq}\right) + {\mathrm{BrO}}_3^{-}\left(\mathrm{aq}\right) + 6{\mathrm{H}}^{+}\left(\mathrm{aq}\right) \to 3{\mathrm{Br}}_2\left(\mathrm{aq}\right) + 3{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right) \\ \mathrm{If}, -\frac{∆\left[{\mathrm{Br}}^{-}\right]}{∆\mathrm{t}}= 0.05 \mathrm{mol} {\mathrm{L}}^{-1} {\min }^{-1}, -\frac{∆\left[{\mathrm{BrO}}_3^{-}\right]}{∆\mathrm{t}} \mathrm{in} {\mathrm{molL}}^{-1} {\min }^{-1} \mathrm{is} \end{gathered}$$

• 0.005

• 0.05

• 0.5

• 0.01

Identify condensation homopolymer from the following:

Identify the nucleoside from the following :

Which one of the following is the correct structure of sulphapyridine?

Iidentify Z in the following reaction:

Which intermediate is formed in the Reimer-Tiemann reaction?

• Aldehyde

• Carbocation

• Carbanion

• Substituted benzal chloride

Which one of the following is an acetal?

${\mathrm{H}}_3{\mathrm{CCONH}}_2 + {\mathrm{Br}}_2 + 4 \mathrm{NaOH} \to \mathrm{Y} + {\mathrm{Na}}_2{\mathrm{CO}}_3+ 2\mathrm{NaBr} + 2{\mathrm{H}}_2\mathrm{O}$

• H₃CCH₂NH₂

• H₃CNH₂

• H₃CCOBr

• HCONH₂

${\mathrm{H}}_3{\mathrm{CCH}}_2{\mathrm{CO}}_2\mathrm{H} \underset{∆}{\overset{{\mathrm{P}}_2{\mathrm{O}}_5}{\to }} \mathrm{X} \stackrel{{\mathrm{H}}_2\mathrm{O}}{\to } \mathrm{Y}\stackrel{{\mathrm{SOCl}}_2}{\to } \mathrm{Z}$. Identify X, Y, and Z.

• X	Y	Z
  H2C=CHCO2H	HOH2CCHOHCO2H	HOH2CCHOHCOCL

• X	Y	Z
  (H3CCH2CO)2O	H3CCH2CO2H	H3CCH2COCl

• X	Y	Z
  (H3CCO)2O	H3CCOC2H	ClCH2COCl

• X	Y	Z
  (H3CCH2CO)2O	H3CCO2H	H3CCOCl