Compounds of transition elements
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CHXII08:THE D- & F-BLOCK ELEMENTS

321219 An aqueous solution of \(\mathrm{CoCl}_{2}\) on addition of excess of conc. \(\mathrm{HCl}\) turns blue due to the formation of

1 \(\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)\right] \mathrm{Cl}_{2}\)
2 \(\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{2} \mathrm{Cl}_{4}\right]^{2-}\)
3 \(\left[\mathrm{CoCl}_{4}\right]^{2-}\)
4 \(\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{2} \mathrm{Cl}_{2}\right]\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321220 Which of the following is obtained when auric chloride reacts with sodium chloride?

1 \(\mathrm{Na}[\mathrm{AuCl}]\)
2 \(\mathrm{Na}\left[\mathrm{AuCl}_{2}\right]\)
3 \(\mathrm{Na}\left[\mathrm{AuCl}_{3}\right]\)
4 \(\mathrm{Na}\left[\mathrm{AuCl}_{4}\right]\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321221 Assertion :
\(\mathrm{FeSO}_{4} \cdot 7 \mathrm{H}_{2} \mathrm{O}\) is a green crystalline compound.
Reason :
Due to atmospheric oxidation, these crystals acquire brown yellow colour.

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

321222 Assertion :
Aqueous solution of \(\mathrm{FeCl}_{3}\) is acidic.
Reason :
The hydrated form of \(\mathrm{FeCl}_{3}\) consists
of six water molecules, \(\mathrm{FeCl}_{3} \cdot 6 \mathrm{H}_{2} \mathrm{O}\).

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

321223 Assertion :
A solution of ferric chloride on standing gives a brown precipitate.
Reason :
\(\mathrm{FeCl}_{3}\) possesses covalent bonds and chlorine bridge structure.

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.
NEET DIGITAL LIBRARY
CHXII08:THE D- & F-BLOCK ELEMENTS

321219 An aqueous solution of \(\mathrm{CoCl}_{2}\) on addition of excess of conc. \(\mathrm{HCl}\) turns blue due to the formation of

1 \(\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)\right] \mathrm{Cl}_{2}\)
2 \(\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{2} \mathrm{Cl}_{4}\right]^{2-}\)
3 \(\left[\mathrm{CoCl}_{4}\right]^{2-}\)
4 \(\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{2} \mathrm{Cl}_{2}\right]\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321220 Which of the following is obtained when auric chloride reacts with sodium chloride?

1 \(\mathrm{Na}[\mathrm{AuCl}]\)
2 \(\mathrm{Na}\left[\mathrm{AuCl}_{2}\right]\)
3 \(\mathrm{Na}\left[\mathrm{AuCl}_{3}\right]\)
4 \(\mathrm{Na}\left[\mathrm{AuCl}_{4}\right]\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321221 Assertion :
\(\mathrm{FeSO}_{4} \cdot 7 \mathrm{H}_{2} \mathrm{O}\) is a green crystalline compound.
Reason :
Due to atmospheric oxidation, these crystals acquire brown yellow colour.

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

321222 Assertion :
Aqueous solution of \(\mathrm{FeCl}_{3}\) is acidic.
Reason :
The hydrated form of \(\mathrm{FeCl}_{3}\) consists
of six water molecules, \(\mathrm{FeCl}_{3} \cdot 6 \mathrm{H}_{2} \mathrm{O}\).

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

321223 Assertion :
A solution of ferric chloride on standing gives a brown precipitate.
Reason :
\(\mathrm{FeCl}_{3}\) possesses covalent bonds and chlorine bridge structure.

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.
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CHXII08:THE D- & F-BLOCK ELEMENTS

321219 An aqueous solution of \(\mathrm{CoCl}_{2}\) on addition of excess of conc. \(\mathrm{HCl}\) turns blue due to the formation of

1 \(\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)\right] \mathrm{Cl}_{2}\)
2 \(\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{2} \mathrm{Cl}_{4}\right]^{2-}\)
3 \(\left[\mathrm{CoCl}_{4}\right]^{2-}\)
4 \(\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{2} \mathrm{Cl}_{2}\right]\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321220 Which of the following is obtained when auric chloride reacts with sodium chloride?

1 \(\mathrm{Na}[\mathrm{AuCl}]\)
2 \(\mathrm{Na}\left[\mathrm{AuCl}_{2}\right]\)
3 \(\mathrm{Na}\left[\mathrm{AuCl}_{3}\right]\)
4 \(\mathrm{Na}\left[\mathrm{AuCl}_{4}\right]\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321221 Assertion :
\(\mathrm{FeSO}_{4} \cdot 7 \mathrm{H}_{2} \mathrm{O}\) is a green crystalline compound.
Reason :
Due to atmospheric oxidation, these crystals acquire brown yellow colour.

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

321222 Assertion :
Aqueous solution of \(\mathrm{FeCl}_{3}\) is acidic.
Reason :
The hydrated form of \(\mathrm{FeCl}_{3}\) consists
of six water molecules, \(\mathrm{FeCl}_{3} \cdot 6 \mathrm{H}_{2} \mathrm{O}\).

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

321223 Assertion :
A solution of ferric chloride on standing gives a brown precipitate.
Reason :
\(\mathrm{FeCl}_{3}\) possesses covalent bonds and chlorine bridge structure.

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.
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CHXII08:THE D- & F-BLOCK ELEMENTS

321219 An aqueous solution of \(\mathrm{CoCl}_{2}\) on addition of excess of conc. \(\mathrm{HCl}\) turns blue due to the formation of

1 \(\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)\right] \mathrm{Cl}_{2}\)
2 \(\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{2} \mathrm{Cl}_{4}\right]^{2-}\)
3 \(\left[\mathrm{CoCl}_{4}\right]^{2-}\)
4 \(\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{2} \mathrm{Cl}_{2}\right]\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321220 Which of the following is obtained when auric chloride reacts with sodium chloride?

1 \(\mathrm{Na}[\mathrm{AuCl}]\)
2 \(\mathrm{Na}\left[\mathrm{AuCl}_{2}\right]\)
3 \(\mathrm{Na}\left[\mathrm{AuCl}_{3}\right]\)
4 \(\mathrm{Na}\left[\mathrm{AuCl}_{4}\right]\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321221 Assertion :
\(\mathrm{FeSO}_{4} \cdot 7 \mathrm{H}_{2} \mathrm{O}\) is a green crystalline compound.
Reason :
Due to atmospheric oxidation, these crystals acquire brown yellow colour.

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

321222 Assertion :
Aqueous solution of \(\mathrm{FeCl}_{3}\) is acidic.
Reason :
The hydrated form of \(\mathrm{FeCl}_{3}\) consists
of six water molecules, \(\mathrm{FeCl}_{3} \cdot 6 \mathrm{H}_{2} \mathrm{O}\).

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

321223 Assertion :
A solution of ferric chloride on standing gives a brown precipitate.
Reason :
\(\mathrm{FeCl}_{3}\) possesses covalent bonds and chlorine bridge structure.

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.
NEET DIGITAL LIBRARY
CHXII08:THE D- & F-BLOCK ELEMENTS

321219 An aqueous solution of \(\mathrm{CoCl}_{2}\) on addition of excess of conc. \(\mathrm{HCl}\) turns blue due to the formation of

1 \(\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)\right] \mathrm{Cl}_{2}\)
2 \(\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{2} \mathrm{Cl}_{4}\right]^{2-}\)
3 \(\left[\mathrm{CoCl}_{4}\right]^{2-}\)
4 \(\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{2} \mathrm{Cl}_{2}\right]\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321220 Which of the following is obtained when auric chloride reacts with sodium chloride?

1 \(\mathrm{Na}[\mathrm{AuCl}]\)
2 \(\mathrm{Na}\left[\mathrm{AuCl}_{2}\right]\)
3 \(\mathrm{Na}\left[\mathrm{AuCl}_{3}\right]\)
4 \(\mathrm{Na}\left[\mathrm{AuCl}_{4}\right]\)
CHXII08:THE D- & F-BLOCK ELEMENTS

321221 Assertion :
\(\mathrm{FeSO}_{4} \cdot 7 \mathrm{H}_{2} \mathrm{O}\) is a green crystalline compound.
Reason :
Due to atmospheric oxidation, these crystals acquire brown yellow colour.

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

321222 Assertion :
Aqueous solution of \(\mathrm{FeCl}_{3}\) is acidic.
Reason :
The hydrated form of \(\mathrm{FeCl}_{3}\) consists
of six water molecules, \(\mathrm{FeCl}_{3} \cdot 6 \mathrm{H}_{2} \mathrm{O}\).

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

321223 Assertion :
A solution of ferric chloride on standing gives a brown precipitate.
Reason :
\(\mathrm{FeCl}_{3}\) possesses covalent bonds and chlorine bridge structure.

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.