A mixture of \( \mathrm{NaCl} \) and \( \mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} \) is heated with conc. \( \mathrm{H}_{2} \mathrm{SO}_{4} \), deep red vapours and formed.
Which of the following statement is false?

(A)
Chromyl chloride test:
\( 4 \mathrm{Cl}^{-}(s)+\mathrm{Cr}_{2} \mathrm{O}_{7}{ }^{2-}(s)+6 \mathrm{H}^{+}( \)conc. \( ) \rightarrow 2 \mathrm{CrO}_{2} \mathrm{Cl}_{2} \) ( deep red vapours ) \( +3 \mathrm{H}_{2} \mathrm{O} \)
When deep red vapours are passed into sodium hydroxide solution, a yellow solution of sodium chromate is formed,
which when treated with lead acetate gives yellow precipitate of lead chromate.
\( \mathrm{CrO}_{2} \mathrm{Cl}_{2}+4 \mathrm{OH}^{-} \rightarrow \mathrm{CrO}_{4}{ }^{2-}+2 \mathrm{Cl}^{-}+2 \mathrm{H}_{2} \mathrm{O} \)
\( \mathrm{CrO}_{4}{ }^{2-}+\mathrm{Pb}^{+2} \rightarrow \mathrm{PbCrO}_{4} \downarrow \) ( yellow)