321301
The equilibrium \({\mathrm{\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-} \rightleftharpoons 2 \mathrm{CrO}_{4}^{2-}}}\) is shifted to the right in
1 a weakly acidic medium
2 a neutral medium
3 an acidic medium
4 a basic medium.
Explanation:
The equilibrium shifts right side in a basic medium and left side in acidic medium. So, the correct option is (4).
JEE Main - 2024
CHXII08:THE D- & F-BLOCK ELEMENTS
321302
In the standardization of \(\mathrm{\mathrm{Na}_{2} \mathrm{~S}_{2} \mathrm{O}_{3}}\) using \(\mathrm{\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}}\) by iodometry, the equivalent weight of \(\mathrm{\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}}\) is
321303
Which is the correct statement about \(\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}\) structure?
1 It has neither \(\mathrm{Cr}-\mathrm{Cr}\) bonds nor \(\mathrm{O}-\mathrm{O}\) bonds
2 It has one \(\mathrm{Cr}-\mathrm{Cr}\) bond and six \(\mathrm{O}-\mathrm{O}\) bonds
3 It has no \(\mathrm{Cr}-\mathrm{Cr}\) bond and has six \(\mathrm{O}-\mathrm{O}\) bonds
4 It has one \(\mathrm{Cr}-\mathrm{Cr}\) bond and seven \(\mathrm{Cr}-\mathrm{O}\) bonds
Explanation:
The structure of \(\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}\) ion is Thus, it has no \(\mathrm{Cr}-\mathrm{Cr}\) bonds and no \(\mathrm{O}-\mathrm{O}\) bonds.
CHXII08:THE D- & F-BLOCK ELEMENTS
321304
When intimate mixture of potassium dichromate and potassium chloride is heated with conc. \(\mathrm{\mathrm{H}_{2} \mathrm{SO}_{4}}\) which of the following is produced in the form of red vapours?
1 \(\mathrm{\mathrm{CrO}_{3}}\)
2 \(\mathrm{\mathrm{Cr}_{2} \mathrm{O}_{3}}\)
3 \(\mathrm{\mathrm{CrO}_{2} \mathrm{Cl}_{2}}\)
4 \(\mathrm{\mathrm{CrO}_{5}}\)
Explanation:
Given reaction is an example of chromyl chloride test
321301
The equilibrium \({\mathrm{\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-} \rightleftharpoons 2 \mathrm{CrO}_{4}^{2-}}}\) is shifted to the right in
1 a weakly acidic medium
2 a neutral medium
3 an acidic medium
4 a basic medium.
Explanation:
The equilibrium shifts right side in a basic medium and left side in acidic medium. So, the correct option is (4).
JEE Main - 2024
CHXII08:THE D- & F-BLOCK ELEMENTS
321302
In the standardization of \(\mathrm{\mathrm{Na}_{2} \mathrm{~S}_{2} \mathrm{O}_{3}}\) using \(\mathrm{\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}}\) by iodometry, the equivalent weight of \(\mathrm{\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}}\) is
321303
Which is the correct statement about \(\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}\) structure?
1 It has neither \(\mathrm{Cr}-\mathrm{Cr}\) bonds nor \(\mathrm{O}-\mathrm{O}\) bonds
2 It has one \(\mathrm{Cr}-\mathrm{Cr}\) bond and six \(\mathrm{O}-\mathrm{O}\) bonds
3 It has no \(\mathrm{Cr}-\mathrm{Cr}\) bond and has six \(\mathrm{O}-\mathrm{O}\) bonds
4 It has one \(\mathrm{Cr}-\mathrm{Cr}\) bond and seven \(\mathrm{Cr}-\mathrm{O}\) bonds
Explanation:
The structure of \(\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}\) ion is Thus, it has no \(\mathrm{Cr}-\mathrm{Cr}\) bonds and no \(\mathrm{O}-\mathrm{O}\) bonds.
CHXII08:THE D- & F-BLOCK ELEMENTS
321304
When intimate mixture of potassium dichromate and potassium chloride is heated with conc. \(\mathrm{\mathrm{H}_{2} \mathrm{SO}_{4}}\) which of the following is produced in the form of red vapours?
1 \(\mathrm{\mathrm{CrO}_{3}}\)
2 \(\mathrm{\mathrm{Cr}_{2} \mathrm{O}_{3}}\)
3 \(\mathrm{\mathrm{CrO}_{2} \mathrm{Cl}_{2}}\)
4 \(\mathrm{\mathrm{CrO}_{5}}\)
Explanation:
Given reaction is an example of chromyl chloride test
321301
The equilibrium \({\mathrm{\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-} \rightleftharpoons 2 \mathrm{CrO}_{4}^{2-}}}\) is shifted to the right in
1 a weakly acidic medium
2 a neutral medium
3 an acidic medium
4 a basic medium.
Explanation:
The equilibrium shifts right side in a basic medium and left side in acidic medium. So, the correct option is (4).
JEE Main - 2024
CHXII08:THE D- & F-BLOCK ELEMENTS
321302
In the standardization of \(\mathrm{\mathrm{Na}_{2} \mathrm{~S}_{2} \mathrm{O}_{3}}\) using \(\mathrm{\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}}\) by iodometry, the equivalent weight of \(\mathrm{\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}}\) is
321303
Which is the correct statement about \(\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}\) structure?
1 It has neither \(\mathrm{Cr}-\mathrm{Cr}\) bonds nor \(\mathrm{O}-\mathrm{O}\) bonds
2 It has one \(\mathrm{Cr}-\mathrm{Cr}\) bond and six \(\mathrm{O}-\mathrm{O}\) bonds
3 It has no \(\mathrm{Cr}-\mathrm{Cr}\) bond and has six \(\mathrm{O}-\mathrm{O}\) bonds
4 It has one \(\mathrm{Cr}-\mathrm{Cr}\) bond and seven \(\mathrm{Cr}-\mathrm{O}\) bonds
Explanation:
The structure of \(\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}\) ion is Thus, it has no \(\mathrm{Cr}-\mathrm{Cr}\) bonds and no \(\mathrm{O}-\mathrm{O}\) bonds.
CHXII08:THE D- & F-BLOCK ELEMENTS
321304
When intimate mixture of potassium dichromate and potassium chloride is heated with conc. \(\mathrm{\mathrm{H}_{2} \mathrm{SO}_{4}}\) which of the following is produced in the form of red vapours?
1 \(\mathrm{\mathrm{CrO}_{3}}\)
2 \(\mathrm{\mathrm{Cr}_{2} \mathrm{O}_{3}}\)
3 \(\mathrm{\mathrm{CrO}_{2} \mathrm{Cl}_{2}}\)
4 \(\mathrm{\mathrm{CrO}_{5}}\)
Explanation:
Given reaction is an example of chromyl chloride test
321301
The equilibrium \({\mathrm{\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-} \rightleftharpoons 2 \mathrm{CrO}_{4}^{2-}}}\) is shifted to the right in
1 a weakly acidic medium
2 a neutral medium
3 an acidic medium
4 a basic medium.
Explanation:
The equilibrium shifts right side in a basic medium and left side in acidic medium. So, the correct option is (4).
JEE Main - 2024
CHXII08:THE D- & F-BLOCK ELEMENTS
321302
In the standardization of \(\mathrm{\mathrm{Na}_{2} \mathrm{~S}_{2} \mathrm{O}_{3}}\) using \(\mathrm{\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}}\) by iodometry, the equivalent weight of \(\mathrm{\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}}\) is
321303
Which is the correct statement about \(\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}\) structure?
1 It has neither \(\mathrm{Cr}-\mathrm{Cr}\) bonds nor \(\mathrm{O}-\mathrm{O}\) bonds
2 It has one \(\mathrm{Cr}-\mathrm{Cr}\) bond and six \(\mathrm{O}-\mathrm{O}\) bonds
3 It has no \(\mathrm{Cr}-\mathrm{Cr}\) bond and has six \(\mathrm{O}-\mathrm{O}\) bonds
4 It has one \(\mathrm{Cr}-\mathrm{Cr}\) bond and seven \(\mathrm{Cr}-\mathrm{O}\) bonds
Explanation:
The structure of \(\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}\) ion is Thus, it has no \(\mathrm{Cr}-\mathrm{Cr}\) bonds and no \(\mathrm{O}-\mathrm{O}\) bonds.
CHXII08:THE D- & F-BLOCK ELEMENTS
321304
When intimate mixture of potassium dichromate and potassium chloride is heated with conc. \(\mathrm{\mathrm{H}_{2} \mathrm{SO}_{4}}\) which of the following is produced in the form of red vapours?
1 \(\mathrm{\mathrm{CrO}_{3}}\)
2 \(\mathrm{\mathrm{Cr}_{2} \mathrm{O}_{3}}\)
3 \(\mathrm{\mathrm{CrO}_{2} \mathrm{Cl}_{2}}\)
4 \(\mathrm{\mathrm{CrO}_{5}}\)
Explanation:
Given reaction is an example of chromyl chloride test
