General characteristics of the transition elements
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CHXII08:THE D- & F-BLOCK ELEMENTS

321427 \(\mathrm{\left[\mathrm{Ti}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}}\) absorbs green and yellow region part of visible light. The colour of the compound is

1 Blue
2 Red
3 Purple
4 Green
CHXII08:THE D- & F-BLOCK ELEMENTS

321428 Which of the following imparts green colour to the glass?

1 \(\mathrm{Cu}_{2} \mathrm{O}\)
2 CdS
3 FeO
4 \(\mathrm{Cr}_{2} \mathrm{O}_{3}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321429 Out of \(\mathrm{TiF}_{6}^{2-}, \mathrm{CoF}_{6}^{3-}, \mathrm{Cu}_{2} \mathrm{Cl}_{2}\) and \(\mathrm{NiCl}_{4}^{2-}(\mathrm{Z}\) of \(\mathrm{Ti}=22\),\(\mathrm{Co}=27, \mathrm{Cu}=29, \mathrm{Ni}=28\)),the colourless species are

1 \(\mathrm{TiF}_{6}^{2-}\) and \(\mathrm{CoF}_{6}^{3-}\)
2 \(\mathrm{Cu}_{2} \mathrm{Cl}_{2}\) and \(\mathrm{NiCl}_{4}^{2-}\)
3 \(\mathrm{TiF}_{6}^{2-}\) and \(\mathrm{Cu}_{2} \mathrm{Cl}_{2}\)
4 \(\mathrm{CoF}_{6}^{3-}\) and \(\mathrm{NiCl}_{4}^{2-}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321430 Out of the following how many of them are coloured compounds:
\({\rm{Mn}}{{\rm{O}}_{\rm{4}}}^ \ominus ,{\rm{C}}{{\rm{r}}_{\rm{2}}}{{\rm{O}}_{\rm{7}}}^{{\rm{2 - }}},{\rm{Cr}}{{\rm{O}}_{\rm{4}}}^{{\rm{2 - }}},{\rm{S}}{{\rm{c}}^{{\rm{3 + }}}},{\rm{T}}{{\rm{i}}^{{\rm{4 + }}}},\)
\({\rm{Z}}{{\rm{n}}^{{\rm{2 + }}}},{\rm{M}}{{\rm{n}}^{{\rm{3 + }}}},{\rm{C}}{{\rm{u}}^{{\rm{2 + }}}},{\rm{F}}{{\rm{e}}^{{\rm{2 + }}}},{\rm{F}}{{\rm{e}}^{{\rm{3 + }}}}\)

1 8
2 1
3 3
4 7
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CHXII08:THE D- & F-BLOCK ELEMENTS

321427 \(\mathrm{\left[\mathrm{Ti}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}}\) absorbs green and yellow region part of visible light. The colour of the compound is

1 Blue
2 Red
3 Purple
4 Green
CHXII08:THE D- & F-BLOCK ELEMENTS

321428 Which of the following imparts green colour to the glass?

1 \(\mathrm{Cu}_{2} \mathrm{O}\)
2 CdS
3 FeO
4 \(\mathrm{Cr}_{2} \mathrm{O}_{3}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321429 Out of \(\mathrm{TiF}_{6}^{2-}, \mathrm{CoF}_{6}^{3-}, \mathrm{Cu}_{2} \mathrm{Cl}_{2}\) and \(\mathrm{NiCl}_{4}^{2-}(\mathrm{Z}\) of \(\mathrm{Ti}=22\),\(\mathrm{Co}=27, \mathrm{Cu}=29, \mathrm{Ni}=28\)),the colourless species are

1 \(\mathrm{TiF}_{6}^{2-}\) and \(\mathrm{CoF}_{6}^{3-}\)
2 \(\mathrm{Cu}_{2} \mathrm{Cl}_{2}\) and \(\mathrm{NiCl}_{4}^{2-}\)
3 \(\mathrm{TiF}_{6}^{2-}\) and \(\mathrm{Cu}_{2} \mathrm{Cl}_{2}\)
4 \(\mathrm{CoF}_{6}^{3-}\) and \(\mathrm{NiCl}_{4}^{2-}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321430 Out of the following how many of them are coloured compounds:
\({\rm{Mn}}{{\rm{O}}_{\rm{4}}}^ \ominus ,{\rm{C}}{{\rm{r}}_{\rm{2}}}{{\rm{O}}_{\rm{7}}}^{{\rm{2 - }}},{\rm{Cr}}{{\rm{O}}_{\rm{4}}}^{{\rm{2 - }}},{\rm{S}}{{\rm{c}}^{{\rm{3 + }}}},{\rm{T}}{{\rm{i}}^{{\rm{4 + }}}},\)
\({\rm{Z}}{{\rm{n}}^{{\rm{2 + }}}},{\rm{M}}{{\rm{n}}^{{\rm{3 + }}}},{\rm{C}}{{\rm{u}}^{{\rm{2 + }}}},{\rm{F}}{{\rm{e}}^{{\rm{2 + }}}},{\rm{F}}{{\rm{e}}^{{\rm{3 + }}}}\)

1 8
2 1
3 3
4 7
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CHXII08:THE D- & F-BLOCK ELEMENTS

321427 \(\mathrm{\left[\mathrm{Ti}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}}\) absorbs green and yellow region part of visible light. The colour of the compound is

1 Blue
2 Red
3 Purple
4 Green
CHXII08:THE D- & F-BLOCK ELEMENTS

321428 Which of the following imparts green colour to the glass?

1 \(\mathrm{Cu}_{2} \mathrm{O}\)
2 CdS
3 FeO
4 \(\mathrm{Cr}_{2} \mathrm{O}_{3}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321429 Out of \(\mathrm{TiF}_{6}^{2-}, \mathrm{CoF}_{6}^{3-}, \mathrm{Cu}_{2} \mathrm{Cl}_{2}\) and \(\mathrm{NiCl}_{4}^{2-}(\mathrm{Z}\) of \(\mathrm{Ti}=22\),\(\mathrm{Co}=27, \mathrm{Cu}=29, \mathrm{Ni}=28\)),the colourless species are

1 \(\mathrm{TiF}_{6}^{2-}\) and \(\mathrm{CoF}_{6}^{3-}\)
2 \(\mathrm{Cu}_{2} \mathrm{Cl}_{2}\) and \(\mathrm{NiCl}_{4}^{2-}\)
3 \(\mathrm{TiF}_{6}^{2-}\) and \(\mathrm{Cu}_{2} \mathrm{Cl}_{2}\)
4 \(\mathrm{CoF}_{6}^{3-}\) and \(\mathrm{NiCl}_{4}^{2-}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321430 Out of the following how many of them are coloured compounds:
\({\rm{Mn}}{{\rm{O}}_{\rm{4}}}^ \ominus ,{\rm{C}}{{\rm{r}}_{\rm{2}}}{{\rm{O}}_{\rm{7}}}^{{\rm{2 - }}},{\rm{Cr}}{{\rm{O}}_{\rm{4}}}^{{\rm{2 - }}},{\rm{S}}{{\rm{c}}^{{\rm{3 + }}}},{\rm{T}}{{\rm{i}}^{{\rm{4 + }}}},\)
\({\rm{Z}}{{\rm{n}}^{{\rm{2 + }}}},{\rm{M}}{{\rm{n}}^{{\rm{3 + }}}},{\rm{C}}{{\rm{u}}^{{\rm{2 + }}}},{\rm{F}}{{\rm{e}}^{{\rm{2 + }}}},{\rm{F}}{{\rm{e}}^{{\rm{3 + }}}}\)

1 8
2 1
3 3
4 7
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CHXII08:THE D- & F-BLOCK ELEMENTS

321427 \(\mathrm{\left[\mathrm{Ti}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}}\) absorbs green and yellow region part of visible light. The colour of the compound is

1 Blue
2 Red
3 Purple
4 Green
CHXII08:THE D- & F-BLOCK ELEMENTS

321428 Which of the following imparts green colour to the glass?

1 \(\mathrm{Cu}_{2} \mathrm{O}\)
2 CdS
3 FeO
4 \(\mathrm{Cr}_{2} \mathrm{O}_{3}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321429 Out of \(\mathrm{TiF}_{6}^{2-}, \mathrm{CoF}_{6}^{3-}, \mathrm{Cu}_{2} \mathrm{Cl}_{2}\) and \(\mathrm{NiCl}_{4}^{2-}(\mathrm{Z}\) of \(\mathrm{Ti}=22\),\(\mathrm{Co}=27, \mathrm{Cu}=29, \mathrm{Ni}=28\)),the colourless species are

1 \(\mathrm{TiF}_{6}^{2-}\) and \(\mathrm{CoF}_{6}^{3-}\)
2 \(\mathrm{Cu}_{2} \mathrm{Cl}_{2}\) and \(\mathrm{NiCl}_{4}^{2-}\)
3 \(\mathrm{TiF}_{6}^{2-}\) and \(\mathrm{Cu}_{2} \mathrm{Cl}_{2}\)
4 \(\mathrm{CoF}_{6}^{3-}\) and \(\mathrm{NiCl}_{4}^{2-}\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321430 Out of the following how many of them are coloured compounds:
\({\rm{Mn}}{{\rm{O}}_{\rm{4}}}^ \ominus ,{\rm{C}}{{\rm{r}}_{\rm{2}}}{{\rm{O}}_{\rm{7}}}^{{\rm{2 - }}},{\rm{Cr}}{{\rm{O}}_{\rm{4}}}^{{\rm{2 - }}},{\rm{S}}{{\rm{c}}^{{\rm{3 + }}}},{\rm{T}}{{\rm{i}}^{{\rm{4 + }}}},\)
\({\rm{Z}}{{\rm{n}}^{{\rm{2 + }}}},{\rm{M}}{{\rm{n}}^{{\rm{3 + }}}},{\rm{C}}{{\rm{u}}^{{\rm{2 + }}}},{\rm{F}}{{\rm{e}}^{{\rm{2 + }}}},{\rm{F}}{{\rm{e}}^{{\rm{3 + }}}}\)

1 8
2 1
3 3
4 7
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