321258 Which of the following statement(s) is/are correct when a mixture of \(\mathrm{\mathrm{NaCl}}\) and \(\mathrm{\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}}\) is gently warmed with conc. \(\mathrm{\mathrm{H}_{2} \mathrm{SO}_{4}}\) ?
I. A deep red vapour is evolved.
II. The vapour when passed into \(\mathrm{\mathrm{NaOH}}\) solution gives a yellow solution of \(\mathrm{\mathrm{Na}_{2} \mathrm{CrO}_{4}}\).
III. Chlorine gas is evolved.
IV. Chromyl chloride is formed.
Choose the correct option.

321259 The incorrect statement with respect to chromyl chloride test is

321260 \(4 \mathrm{~K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} \xrightarrow{\text { heat }} 4 \mathrm{~K}_{2} \mathrm{CrO}_{4}+3 \mathrm{O}_{2}+\mathrm{X}\). In the above reaction ' \(\mathrm{X}\) ' is

321261 How is sodium chromate converted into sodium dichromate in the manufacture of potassium dichromate form chromite ore?

321258 Which of the following statement(s) is/are correct when a mixture of \(\mathrm{\mathrm{NaCl}}\) and \(\mathrm{\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}}\) is gently warmed with conc. \(\mathrm{\mathrm{H}_{2} \mathrm{SO}_{4}}\) ?
I. A deep red vapour is evolved.
II. The vapour when passed into \(\mathrm{\mathrm{NaOH}}\) solution gives a yellow solution of \(\mathrm{\mathrm{Na}_{2} \mathrm{CrO}_{4}}\).
III. Chlorine gas is evolved.
IV. Chromyl chloride is formed.
Choose the correct option.

321259 The incorrect statement with respect to chromyl chloride test is

321260 \(4 \mathrm{~K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} \xrightarrow{\text { heat }} 4 \mathrm{~K}_{2} \mathrm{CrO}_{4}+3 \mathrm{O}_{2}+\mathrm{X}\). In the above reaction ' \(\mathrm{X}\) ' is

321261 How is sodium chromate converted into sodium dichromate in the manufacture of potassium dichromate form chromite ore?

321258 Which of the following statement(s) is/are correct when a mixture of \(\mathrm{\mathrm{NaCl}}\) and \(\mathrm{\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}}\) is gently warmed with conc. \(\mathrm{\mathrm{H}_{2} \mathrm{SO}_{4}}\) ?
I. A deep red vapour is evolved.
II. The vapour when passed into \(\mathrm{\mathrm{NaOH}}\) solution gives a yellow solution of \(\mathrm{\mathrm{Na}_{2} \mathrm{CrO}_{4}}\).
III. Chlorine gas is evolved.
IV. Chromyl chloride is formed.
Choose the correct option.

321259 The incorrect statement with respect to chromyl chloride test is

321260 \(4 \mathrm{~K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} \xrightarrow{\text { heat }} 4 \mathrm{~K}_{2} \mathrm{CrO}_{4}+3 \mathrm{O}_{2}+\mathrm{X}\). In the above reaction ' \(\mathrm{X}\) ' is

321261 How is sodium chromate converted into sodium dichromate in the manufacture of potassium dichromate form chromite ore?

321258 Which of the following statement(s) is/are correct when a mixture of \(\mathrm{\mathrm{NaCl}}\) and \(\mathrm{\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}}\) is gently warmed with conc. \(\mathrm{\mathrm{H}_{2} \mathrm{SO}_{4}}\) ?
I. A deep red vapour is evolved.
II. The vapour when passed into \(\mathrm{\mathrm{NaOH}}\) solution gives a yellow solution of \(\mathrm{\mathrm{Na}_{2} \mathrm{CrO}_{4}}\).
III. Chlorine gas is evolved.
IV. Chromyl chloride is formed.
Choose the correct option.

321259 The incorrect statement with respect to chromyl chloride test is

321260 \(4 \mathrm{~K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} \xrightarrow{\text { heat }} 4 \mathrm{~K}_{2} \mathrm{CrO}_{4}+3 \mathrm{O}_{2}+\mathrm{X}\). In the above reaction ' \(\mathrm{X}\) ' is

321261 How is sodium chromate converted into sodium dichromate in the manufacture of potassium dichromate form chromite ore?