નીચેની પ્રક્રિયાઓ ધ્યાનમાં લો.

$\mathrm{NaCl}+\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}+\mathrm{H}_{2} \mathrm{SO}_{4}(\mathrm{Conc} .) \rightarrow(\mathrm{A})+$ ગૌણ નીપજો

$(\mathrm{A})+\mathrm{NaOH} \rightarrow(\mathrm{B})+$ ગૌણ નીપજો

$(\mathrm{B})+\mathrm{H}_{2} \mathrm{SO}_{4}(\mathrm{dilute})+\mathrm{H}_{2} \mathrm{O}_{2} \rightarrow(\mathrm{C})+$ ગૌણ નીપજો

દરેકના એક અણુમાં પરમાણુઓની કુલ સંખ્યાનો સરવાળો જણાવો.

Question

નીચેની પ્રક્રિયાઓ ધ્યાનમાં લો.

$\mathrm{NaCl}+\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}+\mathrm{H}_{2} \mathrm{SO}_{4}(\mathrm{Conc} .) \rightarrow(\mathrm{A})+$ ગૌણ નીપજો

$(\mathrm{A})+\mathrm{NaOH} \rightarrow(\mathrm{B})+$ ગૌણ નીપજો

$(\mathrm{B})+\mathrm{H}_{2} \mathrm{SO}_{4}(\mathrm{dilute})+\mathrm{H}_{2} \mathrm{O}_{2} \rightarrow(\mathrm{C})+$ ગૌણ નીપજો

દરેકના એક અણુમાં પરમાણુઓની કુલ સંખ્યાનો સરવાળો જણાવો.

JEE MAIN 2020, Diffcult

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Solution

c
$4 \mathrm{NaCl}+\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}+6 \mathrm{H}_{2} \mathrm{SO}_{4}$

$\quad \quad \quad \quad \quad \downarrow$

$2 \mathrm{CrO}_{2} \mathrm{Cl}_{2}+4 \mathrm{NaHSO}_{4}+2 \mathrm{KHSO}_{4}+3 \mathrm{H}_{2} \mathrm{O}$

$(\mathrm{A})$

$\mathrm{CrO}_{2} \mathrm{Cl}_{2}+4 \mathrm{NaOH} \longrightarrow \mathrm{Na}_{2} \mathrm{CrO}_{4}+2 \mathrm{NaCl}+2 \mathrm{H}_{2} \mathrm{O}$

$\quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad (B)$

$\mathrm{Na}_{2} \mathrm{CrO}_{4}+2 \mathrm{H}_{2} \mathrm{SO}_{4}+2 \mathrm{H}_{2} \mathrm{O}_{2}$

$\mathrm{CrO}_{5}+2 \mathrm{NaHSO}_{4}+3 \mathrm{H}_{2} \mathrm{O}$

$(\mathrm{C})$

$A=C r O_{2} C l_{2}$

${B}=\mathrm{Na}_{2} \mathrm{CrO}_{4}$

${C}={C r O}_{5}$

Total number of atom in $\mathrm{A}+\mathrm{B}+\mathrm{C}=18$

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