d-Block Elements- Properties & Uses Past Year (1998 - 2005) MCQs The d and f Block Elements Chemistry NEET Practice Questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, and PDF solved with answers

Ion that gives color with water is:

1. $C u^{+}$

2. $C r^{3 +}$

3. $N a^{+}$

4. None of the above.

Subtopic: d-Block Elements- Properties & Uses |

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Which of the following is a coloured and paramagnetic compound?

1. CuF₂

2. K₂Cr₂O₇

3. $K M n O_{4}$

4. K₄[Fe(CN)₆]

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Compound 'A' in acidic medium does not give ppt with $H_{2} S$ but in $N H_{4} O H$ medium gives a ppt comp. 'A' is:

1. $F e C l_{3}$

2. $A l C l_{3}$

3. $Z n C l_{2}$

4. $S n C l_{2}$

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$FeCr_{2}O_{4} $ when reacts with $N a_{2} C O_{3}$ gives the product:

1. $N a_{2} C r O_{4}$

2. $N a_{2} C r_{2} O_{7}$

3. $F e_{3} O_{4}$

4. FeO

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Colourless ion among the following is:

1.	Cr⁺⁴	2.	Sc⁺³
3.	Ti⁺³	4.	V⁺³

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An element among the following that exhibits the maximum oxidation state is:

1. Cr

2. Mn

3. Fe

4. V

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An element among the following that shows the maximum number of oxidation states is:

1. Cr

2. Fe

3. Mn

4. V

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Zn gives H₂ gas with H₂SO₄ and HCl but not with HNO₃ because:

1.	Zn acts as an oxidizing agent when it reacts with HNO₃
2.	HNO₃ is weaker acid than H₂SO₄ and HCl
3.	In the electrochemical series, Zn is above hydrogen
4.	NO₃^Θ is reduced in preference to hydronium ion.

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The catalytic activity of transition metals is due to:

1.	High enthalpy of atomization
2.	Paramagnetic behaviour
3.	Colour of hydrated ions
4.	Variable oxidation states

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The basic character of the transition metal monoxides follows the order:
(Atomic nos. Ti = 22, V = 23, Cr = 24, Fe = 26)

1.	VO > CrO > TiO > FeO	2.	CrO > VO > FeO > TiO
3.	TiO > FeO > VO > CrO	4.	TiO > VO > CrO > FeO

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