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Zn and Cd metals do not show variable va...

Zn and Cd metals do not show variable valency because:

A

They have only two electrons in the outmost subshells

B

Their d-subshells are completely filled

C

Their d-subshells are partially filled

D

They are relatively soft metals

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The correct Answer is:
B
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VK JAISWAL ENGLISH-d-BLOCK ELEMENTS-ASSERTION-REASON TYPE QUESTIONS
  1. Zn and Cd metals do not show variable valency because:

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  2. Assertion: Melting point of Mn is more than that of Fe. Reason : Mn ...

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  3. Cu((aq.))^+ has less stable nature than Cu((aq.))^(2+) but Fe((aq.))^(...

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  4. Assertion: Zn gives H(2) gas with dil. HCl and also with dil. H(2)SO(4...

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  5. Assertion: KMnO(4) has different equivalent wieghts in acid, neutral o...

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  6. Assertion: Cu^(2+) is more stable than Cu^(+) Reason: Electrode pote...

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  7. Statement 1: Concentrated solution of CuCl(2) in water is yellow in co...

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  8. Assertion: KMnO(4) is purple in colour due to charge transfer . Reas...

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  9. Assertion : CrO(3) reacts with HCl to form chromyl chloride gas Reas...

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  10. Mercury is the only metal which is liquid at 0^(@)C. This is due to it...

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  11. Assertion: CuSO(4)*5H(2)O and FeSO(4)*7H(2)O are blue and green colour...

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  12. Assertion: FeSO(4) and Fe(2)(SO(4))(3) undergoes intramolecular redox ...

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  13. Assertion: Zn(OH)(2) is dissolved in both NH(4)OH and NaOH solution Re...

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  14. Assertion: Increasing order of covalent character among given compound...

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  15. Assertion: AgNO(3) reacts with KCN to form white ppt. of AgCN. This wh...

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  16. Assertion: Zero and negative oxidation state of d-block metal ion are ...

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  17. Assertion: Aquated copper(I) cation undergoes disproportionation as: ...

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  18. Assertion: Melting point of Mn is more than that of Fe. Reason : Mn ...

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  19. Assertion: Cu^(2+)(aq) is less than Cu^(3+)(aq) but Fe^(3+) is more st...

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  20. Assertion: Zn gives H(2) gas with dil. HCl and dil. H(2)SO(4) but not...

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  21. Assertion: KMnO(4) has different equivalent wieghts in acid, neutral o...

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