Physical properties
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CHXII08:THE D- & F-BLOCK ELEMENTS

321608 Which of the following statements are correct?
(I) Chromium has the highest melting point among the \({\rm{3d}}\) series metals
(II) Number of unpaired electrons is greater in Cr than other elements of \({\rm{3d}}\) series.
(III) In any row the melting point of transition metal increases as the atomic number increases.

1 (I) and (III)
2 (I) and (II)
3 (II) and (III)
4 (I), (II) and (III)
CHXII08:THE D- & F-BLOCK ELEMENTS

321609 Mercury is a liquid metal because

1 it has a completely filled d-orbital that prevents d-d overlapping of orbitals
2 it has a completely filled d-orbital that causes d-d overlapping
3 it has a completely filled s-orbital
4 it has a small atomic size.
CHXII08:THE D- & F-BLOCK ELEMENTS

321610 Assertion :
Tungsten filament is used in electric bulb.
Reason :
Tungsten is a metal of high melting point.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXII08:THE D- & F-BLOCK ELEMENTS

321611 Transition elements show high melting points because

1 d-electrons are involved in interatomic metallic bond in addition to \(\mathrm{s}\) electrons
2 All are hard metals
3 Generally metals have high MP
4 They show a transition from metals to non metals
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CHXII08:THE D- & F-BLOCK ELEMENTS

321608 Which of the following statements are correct?
(I) Chromium has the highest melting point among the \({\rm{3d}}\) series metals
(II) Number of unpaired electrons is greater in Cr than other elements of \({\rm{3d}}\) series.
(III) In any row the melting point of transition metal increases as the atomic number increases.

1 (I) and (III)
2 (I) and (II)
3 (II) and (III)
4 (I), (II) and (III)
CHXII08:THE D- & F-BLOCK ELEMENTS

321609 Mercury is a liquid metal because

1 it has a completely filled d-orbital that prevents d-d overlapping of orbitals
2 it has a completely filled d-orbital that causes d-d overlapping
3 it has a completely filled s-orbital
4 it has a small atomic size.
CHXII08:THE D- & F-BLOCK ELEMENTS

321610 Assertion :
Tungsten filament is used in electric bulb.
Reason :
Tungsten is a metal of high melting point.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXII08:THE D- & F-BLOCK ELEMENTS

321611 Transition elements show high melting points because

1 d-electrons are involved in interatomic metallic bond in addition to \(\mathrm{s}\) electrons
2 All are hard metals
3 Generally metals have high MP
4 They show a transition from metals to non metals
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CHXII08:THE D- & F-BLOCK ELEMENTS

321608 Which of the following statements are correct?
(I) Chromium has the highest melting point among the \({\rm{3d}}\) series metals
(II) Number of unpaired electrons is greater in Cr than other elements of \({\rm{3d}}\) series.
(III) In any row the melting point of transition metal increases as the atomic number increases.

1 (I) and (III)
2 (I) and (II)
3 (II) and (III)
4 (I), (II) and (III)
CHXII08:THE D- & F-BLOCK ELEMENTS

321609 Mercury is a liquid metal because

1 it has a completely filled d-orbital that prevents d-d overlapping of orbitals
2 it has a completely filled d-orbital that causes d-d overlapping
3 it has a completely filled s-orbital
4 it has a small atomic size.
CHXII08:THE D- & F-BLOCK ELEMENTS

321610 Assertion :
Tungsten filament is used in electric bulb.
Reason :
Tungsten is a metal of high melting point.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXII08:THE D- & F-BLOCK ELEMENTS

321611 Transition elements show high melting points because

1 d-electrons are involved in interatomic metallic bond in addition to \(\mathrm{s}\) electrons
2 All are hard metals
3 Generally metals have high MP
4 They show a transition from metals to non metals
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CHXII08:THE D- & F-BLOCK ELEMENTS

321608 Which of the following statements are correct?
(I) Chromium has the highest melting point among the \({\rm{3d}}\) series metals
(II) Number of unpaired electrons is greater in Cr than other elements of \({\rm{3d}}\) series.
(III) In any row the melting point of transition metal increases as the atomic number increases.

1 (I) and (III)
2 (I) and (II)
3 (II) and (III)
4 (I), (II) and (III)
CHXII08:THE D- & F-BLOCK ELEMENTS

321609 Mercury is a liquid metal because

1 it has a completely filled d-orbital that prevents d-d overlapping of orbitals
2 it has a completely filled d-orbital that causes d-d overlapping
3 it has a completely filled s-orbital
4 it has a small atomic size.
CHXII08:THE D- & F-BLOCK ELEMENTS

321610 Assertion :
Tungsten filament is used in electric bulb.
Reason :
Tungsten is a metal of high melting point.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXII08:THE D- & F-BLOCK ELEMENTS

321611 Transition elements show high melting points because

1 d-electrons are involved in interatomic metallic bond in addition to \(\mathrm{s}\) electrons
2 All are hard metals
3 Generally metals have high MP
4 They show a transition from metals to non metals
For More Updates join with Us