162427
Which of the following has more unpaird d-electrons :
1 \(\mathrm{Ni}^{3+}\)
2 \(\mathrm{Fe}^{2+}\)
3 \(\mathrm{Zn}^{+}\)
4 \(\mathrm{Cu}^{+}\)
Explanation:
In \(\mathrm{Fe}^{+2}\) there are four unpaired electron.
NCERT-XII-94
9 RBTS PAPER
162428
Which of the following shows maximum number of oxdiation states :
1 \(\mathrm{Cr}\)
2 \(\mathrm{Fe}\)
3 \(\mathrm{Mn}\)
4 \(\mathrm{V}\)
Explanation:
Mn shows +2 to +7 oxidation state.
NCERT-XII-96
9 RBTS PAPER
162429
In which of the following pair both the ions are coloured in aqueous solution (At. no. : \(\mathrm{Sc}=\mathbf{2 1}\), \(\mathrm{Ti}=22, \mathrm{Ni}=28, \mathrm{Cu}=29, \mathrm{Co}=27\) ):
1 \(\mathrm{Ni}^{2+}, \mathrm{Cu}^{+}\)
2 \(\mathrm{Ni}^{2+}, \mathrm{Ti}^{3+}\)
3 \(\mathrm{Sc}^{3+}, \mathrm{Ti}^{3+}\)
4 \(\mathrm{Sc}^{3+}, \mathrm{Co}^{2+}\)
Explanation:
In \(\mathrm{Ni}^{+2}\) and \(\mathrm{Ti}^{+3}\) there are two and one unpaired electron respectively so species will be coloured.
NCERT-XII-103
9 RBTS PAPER
162430
Which one of the following ions is the most stable in aqueous solution :
(At. No. \(\mathrm{Ti}=22, \mathrm{~V}=23, \mathrm{Cr}=24, \mathrm{Mn}=25\) )
1 \(\mathrm{V}^{3+}\)
2 \(\mathrm{Ti}^{3+}\)
3 \(\mathrm{Mn}^{3+}\)
4 \(\mathrm{Cr}^{3+}\)
Explanation:
Due to more negative \(\mathrm{E}^0\) for \(\mathrm{Cr}^{3+}\).
NCERT-XII-98
9 RBTS PAPER
162431
Which of the following compounds is/are coloured due to charge transfer spectra and not due to d-d transition:
1 \(\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7\)
2 \(\mathrm{KMnO}_4\)
3 \(\mathrm{K}_2 \mathrm{CrO}_4\)
4 All of these
Explanation:
For charge transfer central transition metal atom must be in its highest oxidation states.
162427
Which of the following has more unpaird d-electrons :
1 \(\mathrm{Ni}^{3+}\)
2 \(\mathrm{Fe}^{2+}\)
3 \(\mathrm{Zn}^{+}\)
4 \(\mathrm{Cu}^{+}\)
Explanation:
In \(\mathrm{Fe}^{+2}\) there are four unpaired electron.
NCERT-XII-94
9 RBTS PAPER
162428
Which of the following shows maximum number of oxdiation states :
1 \(\mathrm{Cr}\)
2 \(\mathrm{Fe}\)
3 \(\mathrm{Mn}\)
4 \(\mathrm{V}\)
Explanation:
Mn shows +2 to +7 oxidation state.
NCERT-XII-96
9 RBTS PAPER
162429
In which of the following pair both the ions are coloured in aqueous solution (At. no. : \(\mathrm{Sc}=\mathbf{2 1}\), \(\mathrm{Ti}=22, \mathrm{Ni}=28, \mathrm{Cu}=29, \mathrm{Co}=27\) ):
1 \(\mathrm{Ni}^{2+}, \mathrm{Cu}^{+}\)
2 \(\mathrm{Ni}^{2+}, \mathrm{Ti}^{3+}\)
3 \(\mathrm{Sc}^{3+}, \mathrm{Ti}^{3+}\)
4 \(\mathrm{Sc}^{3+}, \mathrm{Co}^{2+}\)
Explanation:
In \(\mathrm{Ni}^{+2}\) and \(\mathrm{Ti}^{+3}\) there are two and one unpaired electron respectively so species will be coloured.
NCERT-XII-103
9 RBTS PAPER
162430
Which one of the following ions is the most stable in aqueous solution :
(At. No. \(\mathrm{Ti}=22, \mathrm{~V}=23, \mathrm{Cr}=24, \mathrm{Mn}=25\) )
1 \(\mathrm{V}^{3+}\)
2 \(\mathrm{Ti}^{3+}\)
3 \(\mathrm{Mn}^{3+}\)
4 \(\mathrm{Cr}^{3+}\)
Explanation:
Due to more negative \(\mathrm{E}^0\) for \(\mathrm{Cr}^{3+}\).
NCERT-XII-98
9 RBTS PAPER
162431
Which of the following compounds is/are coloured due to charge transfer spectra and not due to d-d transition:
1 \(\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7\)
2 \(\mathrm{KMnO}_4\)
3 \(\mathrm{K}_2 \mathrm{CrO}_4\)
4 All of these
Explanation:
For charge transfer central transition metal atom must be in its highest oxidation states.
162427
Which of the following has more unpaird d-electrons :
1 \(\mathrm{Ni}^{3+}\)
2 \(\mathrm{Fe}^{2+}\)
3 \(\mathrm{Zn}^{+}\)
4 \(\mathrm{Cu}^{+}\)
Explanation:
In \(\mathrm{Fe}^{+2}\) there are four unpaired electron.
NCERT-XII-94
9 RBTS PAPER
162428
Which of the following shows maximum number of oxdiation states :
1 \(\mathrm{Cr}\)
2 \(\mathrm{Fe}\)
3 \(\mathrm{Mn}\)
4 \(\mathrm{V}\)
Explanation:
Mn shows +2 to +7 oxidation state.
NCERT-XII-96
9 RBTS PAPER
162429
In which of the following pair both the ions are coloured in aqueous solution (At. no. : \(\mathrm{Sc}=\mathbf{2 1}\), \(\mathrm{Ti}=22, \mathrm{Ni}=28, \mathrm{Cu}=29, \mathrm{Co}=27\) ):
1 \(\mathrm{Ni}^{2+}, \mathrm{Cu}^{+}\)
2 \(\mathrm{Ni}^{2+}, \mathrm{Ti}^{3+}\)
3 \(\mathrm{Sc}^{3+}, \mathrm{Ti}^{3+}\)
4 \(\mathrm{Sc}^{3+}, \mathrm{Co}^{2+}\)
Explanation:
In \(\mathrm{Ni}^{+2}\) and \(\mathrm{Ti}^{+3}\) there are two and one unpaired electron respectively so species will be coloured.
NCERT-XII-103
9 RBTS PAPER
162430
Which one of the following ions is the most stable in aqueous solution :
(At. No. \(\mathrm{Ti}=22, \mathrm{~V}=23, \mathrm{Cr}=24, \mathrm{Mn}=25\) )
1 \(\mathrm{V}^{3+}\)
2 \(\mathrm{Ti}^{3+}\)
3 \(\mathrm{Mn}^{3+}\)
4 \(\mathrm{Cr}^{3+}\)
Explanation:
Due to more negative \(\mathrm{E}^0\) for \(\mathrm{Cr}^{3+}\).
NCERT-XII-98
9 RBTS PAPER
162431
Which of the following compounds is/are coloured due to charge transfer spectra and not due to d-d transition:
1 \(\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7\)
2 \(\mathrm{KMnO}_4\)
3 \(\mathrm{K}_2 \mathrm{CrO}_4\)
4 All of these
Explanation:
For charge transfer central transition metal atom must be in its highest oxidation states.
162427
Which of the following has more unpaird d-electrons :
1 \(\mathrm{Ni}^{3+}\)
2 \(\mathrm{Fe}^{2+}\)
3 \(\mathrm{Zn}^{+}\)
4 \(\mathrm{Cu}^{+}\)
Explanation:
In \(\mathrm{Fe}^{+2}\) there are four unpaired electron.
NCERT-XII-94
9 RBTS PAPER
162428
Which of the following shows maximum number of oxdiation states :
1 \(\mathrm{Cr}\)
2 \(\mathrm{Fe}\)
3 \(\mathrm{Mn}\)
4 \(\mathrm{V}\)
Explanation:
Mn shows +2 to +7 oxidation state.
NCERT-XII-96
9 RBTS PAPER
162429
In which of the following pair both the ions are coloured in aqueous solution (At. no. : \(\mathrm{Sc}=\mathbf{2 1}\), \(\mathrm{Ti}=22, \mathrm{Ni}=28, \mathrm{Cu}=29, \mathrm{Co}=27\) ):
1 \(\mathrm{Ni}^{2+}, \mathrm{Cu}^{+}\)
2 \(\mathrm{Ni}^{2+}, \mathrm{Ti}^{3+}\)
3 \(\mathrm{Sc}^{3+}, \mathrm{Ti}^{3+}\)
4 \(\mathrm{Sc}^{3+}, \mathrm{Co}^{2+}\)
Explanation:
In \(\mathrm{Ni}^{+2}\) and \(\mathrm{Ti}^{+3}\) there are two and one unpaired electron respectively so species will be coloured.
NCERT-XII-103
9 RBTS PAPER
162430
Which one of the following ions is the most stable in aqueous solution :
(At. No. \(\mathrm{Ti}=22, \mathrm{~V}=23, \mathrm{Cr}=24, \mathrm{Mn}=25\) )
1 \(\mathrm{V}^{3+}\)
2 \(\mathrm{Ti}^{3+}\)
3 \(\mathrm{Mn}^{3+}\)
4 \(\mathrm{Cr}^{3+}\)
Explanation:
Due to more negative \(\mathrm{E}^0\) for \(\mathrm{Cr}^{3+}\).
NCERT-XII-98
9 RBTS PAPER
162431
Which of the following compounds is/are coloured due to charge transfer spectra and not due to d-d transition:
1 \(\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7\)
2 \(\mathrm{KMnO}_4\)
3 \(\mathrm{K}_2 \mathrm{CrO}_4\)
4 All of these
Explanation:
For charge transfer central transition metal atom must be in its highest oxidation states.
162427
Which of the following has more unpaird d-electrons :
1 \(\mathrm{Ni}^{3+}\)
2 \(\mathrm{Fe}^{2+}\)
3 \(\mathrm{Zn}^{+}\)
4 \(\mathrm{Cu}^{+}\)
Explanation:
In \(\mathrm{Fe}^{+2}\) there are four unpaired electron.
NCERT-XII-94
9 RBTS PAPER
162428
Which of the following shows maximum number of oxdiation states :
1 \(\mathrm{Cr}\)
2 \(\mathrm{Fe}\)
3 \(\mathrm{Mn}\)
4 \(\mathrm{V}\)
Explanation:
Mn shows +2 to +7 oxidation state.
NCERT-XII-96
9 RBTS PAPER
162429
In which of the following pair both the ions are coloured in aqueous solution (At. no. : \(\mathrm{Sc}=\mathbf{2 1}\), \(\mathrm{Ti}=22, \mathrm{Ni}=28, \mathrm{Cu}=29, \mathrm{Co}=27\) ):
1 \(\mathrm{Ni}^{2+}, \mathrm{Cu}^{+}\)
2 \(\mathrm{Ni}^{2+}, \mathrm{Ti}^{3+}\)
3 \(\mathrm{Sc}^{3+}, \mathrm{Ti}^{3+}\)
4 \(\mathrm{Sc}^{3+}, \mathrm{Co}^{2+}\)
Explanation:
In \(\mathrm{Ni}^{+2}\) and \(\mathrm{Ti}^{+3}\) there are two and one unpaired electron respectively so species will be coloured.
NCERT-XII-103
9 RBTS PAPER
162430
Which one of the following ions is the most stable in aqueous solution :
(At. No. \(\mathrm{Ti}=22, \mathrm{~V}=23, \mathrm{Cr}=24, \mathrm{Mn}=25\) )
1 \(\mathrm{V}^{3+}\)
2 \(\mathrm{Ti}^{3+}\)
3 \(\mathrm{Mn}^{3+}\)
4 \(\mathrm{Cr}^{3+}\)
Explanation:
Due to more negative \(\mathrm{E}^0\) for \(\mathrm{Cr}^{3+}\).
NCERT-XII-98
9 RBTS PAPER
162431
Which of the following compounds is/are coloured due to charge transfer spectra and not due to d-d transition:
1 \(\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7\)
2 \(\mathrm{KMnO}_4\)
3 \(\mathrm{K}_2 \mathrm{CrO}_4\)
4 All of these
Explanation:
For charge transfer central transition metal atom must be in its highest oxidation states.
