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

321440 In the flame test of a mixture of salts, a green flame with blue centre was observed. Which one of the following cations may be present?

1 \(\mathrm{\mathrm{Cu}^{2+}}\)
2 \(\mathrm{\mathrm{Sr}^{2+}}\)
3 \(\mathrm{\mathrm{Ba}^{2+}}\)
4 \(\mathrm{\mathrm{Ca}^{2+}}\)
JEE - 2022
CHXII08:THE D- & F-BLOCK ELEMENTS

321441 A pink coloured salt turns blue on heating. The presence of which cation is most likely?

1 \(\mathrm{\mathrm{Co}^{2+}}\)
2 \(\mathrm{\mathrm{Fe}^{2+}}\)
3 \(\mathrm{\mathrm{Cu}^{2+}}\)
4 \(\mathrm{\mathrm{Zn}^{2+}}\)
JEE - 2015
CHXII08:THE D- & F-BLOCK ELEMENTS

321442 Assertion :
\(\mathrm{KMnO}_{4}\) is a coloured compound.
Reason :
Colour of \(\mathrm{KMnO}_{4}\) is due to charge transfer.

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

321443 Which of these ions is expected to be coloured in aqueous solution?
I. \(\mathrm{Fe}^{3+}\) II. \(\mathrm{Ni}^{2+}\) III. \(\mathrm{Al}^{3+}\)

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

321440 In the flame test of a mixture of salts, a green flame with blue centre was observed. Which one of the following cations may be present?

1 \(\mathrm{\mathrm{Cu}^{2+}}\)
2 \(\mathrm{\mathrm{Sr}^{2+}}\)
3 \(\mathrm{\mathrm{Ba}^{2+}}\)
4 \(\mathrm{\mathrm{Ca}^{2+}}\)
JEE - 2022
CHXII08:THE D- & F-BLOCK ELEMENTS

321441 A pink coloured salt turns blue on heating. The presence of which cation is most likely?

1 \(\mathrm{\mathrm{Co}^{2+}}\)
2 \(\mathrm{\mathrm{Fe}^{2+}}\)
3 \(\mathrm{\mathrm{Cu}^{2+}}\)
4 \(\mathrm{\mathrm{Zn}^{2+}}\)
JEE - 2015
CHXII08:THE D- & F-BLOCK ELEMENTS

321442 Assertion :
\(\mathrm{KMnO}_{4}\) is a coloured compound.
Reason :
Colour of \(\mathrm{KMnO}_{4}\) is due to charge transfer.

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

321443 Which of these ions is expected to be coloured in aqueous solution?
I. \(\mathrm{Fe}^{3+}\) II. \(\mathrm{Ni}^{2+}\) III. \(\mathrm{Al}^{3+}\)

1 I and II
2 II and III
3 I and III
4 I, II and III
For More Updates join with Us
CHXII08:THE D- & F-BLOCK ELEMENTS

321440 In the flame test of a mixture of salts, a green flame with blue centre was observed. Which one of the following cations may be present?

1 \(\mathrm{\mathrm{Cu}^{2+}}\)
2 \(\mathrm{\mathrm{Sr}^{2+}}\)
3 \(\mathrm{\mathrm{Ba}^{2+}}\)
4 \(\mathrm{\mathrm{Ca}^{2+}}\)
JEE - 2022
CHXII08:THE D- & F-BLOCK ELEMENTS

321441 A pink coloured salt turns blue on heating. The presence of which cation is most likely?

1 \(\mathrm{\mathrm{Co}^{2+}}\)
2 \(\mathrm{\mathrm{Fe}^{2+}}\)
3 \(\mathrm{\mathrm{Cu}^{2+}}\)
4 \(\mathrm{\mathrm{Zn}^{2+}}\)
JEE - 2015
CHXII08:THE D- & F-BLOCK ELEMENTS

321442 Assertion :
\(\mathrm{KMnO}_{4}\) is a coloured compound.
Reason :
Colour of \(\mathrm{KMnO}_{4}\) is due to charge transfer.

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

321443 Which of these ions is expected to be coloured in aqueous solution?
I. \(\mathrm{Fe}^{3+}\) II. \(\mathrm{Ni}^{2+}\) III. \(\mathrm{Al}^{3+}\)

1 I and II
2 II and III
3 I and III
4 I, II and III
NEET DIGITAL LIBRARY
CHXII08:THE D- & F-BLOCK ELEMENTS

321440 In the flame test of a mixture of salts, a green flame with blue centre was observed. Which one of the following cations may be present?

1 \(\mathrm{\mathrm{Cu}^{2+}}\)
2 \(\mathrm{\mathrm{Sr}^{2+}}\)
3 \(\mathrm{\mathrm{Ba}^{2+}}\)
4 \(\mathrm{\mathrm{Ca}^{2+}}\)
JEE - 2022
CHXII08:THE D- & F-BLOCK ELEMENTS

321441 A pink coloured salt turns blue on heating. The presence of which cation is most likely?

1 \(\mathrm{\mathrm{Co}^{2+}}\)
2 \(\mathrm{\mathrm{Fe}^{2+}}\)
3 \(\mathrm{\mathrm{Cu}^{2+}}\)
4 \(\mathrm{\mathrm{Zn}^{2+}}\)
JEE - 2015
CHXII08:THE D- & F-BLOCK ELEMENTS

321442 Assertion :
\(\mathrm{KMnO}_{4}\) is a coloured compound.
Reason :
Colour of \(\mathrm{KMnO}_{4}\) is due to charge transfer.

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

321443 Which of these ions is expected to be coloured in aqueous solution?
I. \(\mathrm{Fe}^{3+}\) II. \(\mathrm{Ni}^{2+}\) III. \(\mathrm{Al}^{3+}\)

1 I and II
2 II and III
3 I and III
4 I, II and III
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