321254
Which of the following can react with \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) ?
1 \(\mathrm{SO}_{3}^{-2}\)
2 \(\mathrm{CO}_{3}^{-2}\)
3 \(\mathrm{SO}_{4}^{-2}\)
4 \(\mathrm{NO}_{3}^{-}\)
Explanation:
\(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) cannot oxidise \(\mathrm{SO}_{4}^{-2}, \mathrm{CO}_{3}^{-2}, \mathrm{NO}_{3}^{-}\)as these are already in highest oxidised forms. \(\mathrm{SO}_{3}^{-2}\) reacts with \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) as follows : \(\begin{aligned}& \mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}(\mathrm{aq})+3 \mathrm{SO}_{3}^{-2}(\mathrm{aq})+8 \mathrm{H}^{+}(\mathrm{aq}) \\& \rightarrow 2 \mathrm{Cr}^{3+}(\mathrm{aq})+3 \mathrm{SO}_{4}^{2-}(\mathrm{aq})+4 \mathrm{H}_{2} \mathrm{O}(\mathrm{l})\end{aligned}\)
AIIMS - 2019
CHXII08:THE D- & F-BLOCK ELEMENTS
321255
Which of the following is not a similarity between sulphur and chromium?
1 Both exhibit hexa covalency
2 Sulphate and chromate of \(\mathrm{\mathrm{Ba}^{2+}}\) are water insoluble
3 Trioxide \(\mathrm{\left(\mathrm{MO}_{3}\right)}\) both are acidic
4 Sulphate \(\mathrm{\left(\mathrm{SO}_{4}^{2-}\right)}\) and chromate \(\mathrm{\left(\mathrm{CrO}_{4}^{2-}\right)}\) have same colourisation
Explanation:
Sulphate \(\left( {{\rm{SO}}_{\rm{4}}^{{\rm{2 - }}}} \right)\) and chromate \(\left( {{\rm{CrO}}_{\rm{4}}^{{\rm{2 - }}}} \right)\) have same colourisation
CHXII08:THE D- & F-BLOCK ELEMENTS
321256
When acidified \(\mathrm{\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}}\) solution is added to \(\mathrm{\mathrm{Sn}^{2+}}\) salts then \(\mathrm{\mathrm{Sn}^{2+}}\) changes to
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CHXII08:THE D- & F-BLOCK ELEMENTS
321254
Which of the following can react with \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) ?
1 \(\mathrm{SO}_{3}^{-2}\)
2 \(\mathrm{CO}_{3}^{-2}\)
3 \(\mathrm{SO}_{4}^{-2}\)
4 \(\mathrm{NO}_{3}^{-}\)
Explanation:
\(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) cannot oxidise \(\mathrm{SO}_{4}^{-2}, \mathrm{CO}_{3}^{-2}, \mathrm{NO}_{3}^{-}\)as these are already in highest oxidised forms. \(\mathrm{SO}_{3}^{-2}\) reacts with \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) as follows : \(\begin{aligned}& \mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}(\mathrm{aq})+3 \mathrm{SO}_{3}^{-2}(\mathrm{aq})+8 \mathrm{H}^{+}(\mathrm{aq}) \\& \rightarrow 2 \mathrm{Cr}^{3+}(\mathrm{aq})+3 \mathrm{SO}_{4}^{2-}(\mathrm{aq})+4 \mathrm{H}_{2} \mathrm{O}(\mathrm{l})\end{aligned}\)
AIIMS - 2019
CHXII08:THE D- & F-BLOCK ELEMENTS
321255
Which of the following is not a similarity between sulphur and chromium?
1 Both exhibit hexa covalency
2 Sulphate and chromate of \(\mathrm{\mathrm{Ba}^{2+}}\) are water insoluble
3 Trioxide \(\mathrm{\left(\mathrm{MO}_{3}\right)}\) both are acidic
4 Sulphate \(\mathrm{\left(\mathrm{SO}_{4}^{2-}\right)}\) and chromate \(\mathrm{\left(\mathrm{CrO}_{4}^{2-}\right)}\) have same colourisation
Explanation:
Sulphate \(\left( {{\rm{SO}}_{\rm{4}}^{{\rm{2 - }}}} \right)\) and chromate \(\left( {{\rm{CrO}}_{\rm{4}}^{{\rm{2 - }}}} \right)\) have same colourisation
CHXII08:THE D- & F-BLOCK ELEMENTS
321256
When acidified \(\mathrm{\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}}\) solution is added to \(\mathrm{\mathrm{Sn}^{2+}}\) salts then \(\mathrm{\mathrm{Sn}^{2+}}\) changes to
321254
Which of the following can react with \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) ?
1 \(\mathrm{SO}_{3}^{-2}\)
2 \(\mathrm{CO}_{3}^{-2}\)
3 \(\mathrm{SO}_{4}^{-2}\)
4 \(\mathrm{NO}_{3}^{-}\)
Explanation:
\(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) cannot oxidise \(\mathrm{SO}_{4}^{-2}, \mathrm{CO}_{3}^{-2}, \mathrm{NO}_{3}^{-}\)as these are already in highest oxidised forms. \(\mathrm{SO}_{3}^{-2}\) reacts with \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) as follows : \(\begin{aligned}& \mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}(\mathrm{aq})+3 \mathrm{SO}_{3}^{-2}(\mathrm{aq})+8 \mathrm{H}^{+}(\mathrm{aq}) \\& \rightarrow 2 \mathrm{Cr}^{3+}(\mathrm{aq})+3 \mathrm{SO}_{4}^{2-}(\mathrm{aq})+4 \mathrm{H}_{2} \mathrm{O}(\mathrm{l})\end{aligned}\)
AIIMS - 2019
CHXII08:THE D- & F-BLOCK ELEMENTS
321255
Which of the following is not a similarity between sulphur and chromium?
1 Both exhibit hexa covalency
2 Sulphate and chromate of \(\mathrm{\mathrm{Ba}^{2+}}\) are water insoluble
3 Trioxide \(\mathrm{\left(\mathrm{MO}_{3}\right)}\) both are acidic
4 Sulphate \(\mathrm{\left(\mathrm{SO}_{4}^{2-}\right)}\) and chromate \(\mathrm{\left(\mathrm{CrO}_{4}^{2-}\right)}\) have same colourisation
Explanation:
Sulphate \(\left( {{\rm{SO}}_{\rm{4}}^{{\rm{2 - }}}} \right)\) and chromate \(\left( {{\rm{CrO}}_{\rm{4}}^{{\rm{2 - }}}} \right)\) have same colourisation
CHXII08:THE D- & F-BLOCK ELEMENTS
321256
When acidified \(\mathrm{\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}}\) solution is added to \(\mathrm{\mathrm{Sn}^{2+}}\) salts then \(\mathrm{\mathrm{Sn}^{2+}}\) changes to
321254
Which of the following can react with \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) ?
1 \(\mathrm{SO}_{3}^{-2}\)
2 \(\mathrm{CO}_{3}^{-2}\)
3 \(\mathrm{SO}_{4}^{-2}\)
4 \(\mathrm{NO}_{3}^{-}\)
Explanation:
\(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) cannot oxidise \(\mathrm{SO}_{4}^{-2}, \mathrm{CO}_{3}^{-2}, \mathrm{NO}_{3}^{-}\)as these are already in highest oxidised forms. \(\mathrm{SO}_{3}^{-2}\) reacts with \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) as follows : \(\begin{aligned}& \mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}(\mathrm{aq})+3 \mathrm{SO}_{3}^{-2}(\mathrm{aq})+8 \mathrm{H}^{+}(\mathrm{aq}) \\& \rightarrow 2 \mathrm{Cr}^{3+}(\mathrm{aq})+3 \mathrm{SO}_{4}^{2-}(\mathrm{aq})+4 \mathrm{H}_{2} \mathrm{O}(\mathrm{l})\end{aligned}\)
AIIMS - 2019
CHXII08:THE D- & F-BLOCK ELEMENTS
321255
Which of the following is not a similarity between sulphur and chromium?
1 Both exhibit hexa covalency
2 Sulphate and chromate of \(\mathrm{\mathrm{Ba}^{2+}}\) are water insoluble
3 Trioxide \(\mathrm{\left(\mathrm{MO}_{3}\right)}\) both are acidic
4 Sulphate \(\mathrm{\left(\mathrm{SO}_{4}^{2-}\right)}\) and chromate \(\mathrm{\left(\mathrm{CrO}_{4}^{2-}\right)}\) have same colourisation
Explanation:
Sulphate \(\left( {{\rm{SO}}_{\rm{4}}^{{\rm{2 - }}}} \right)\) and chromate \(\left( {{\rm{CrO}}_{\rm{4}}^{{\rm{2 - }}}} \right)\) have same colourisation
CHXII08:THE D- & F-BLOCK ELEMENTS
321256
When acidified \(\mathrm{\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}}\) solution is added to \(\mathrm{\mathrm{Sn}^{2+}}\) salts then \(\mathrm{\mathrm{Sn}^{2+}}\) changes to