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Transition metals make the most efficien...

Transition metals make the most efficient catalysts because of their ability to

A

adopt multiple oxidation states and to form omplexes

B

form coloured ions

C

show paramagnetism due to upaired electrons

D

form a large number of oxides.

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A
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NCERT FINGERTIPS ENGLISH-THE D- AND F- BLOCK ELEMENTS -Assertion And Reason
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  4. Assertion (A) Cu^(2+) iodide is not known. Reason (R ) Cu^(2+) oxidi...

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  5. Assertion : Cr^(2+) is reducing and Mn^(3+) is oxidising. Reason : C...

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  6. STATEMENT-1: The highest oxidation state of chromium in its compounds ...

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  7. Assertion : The ability of oxygen to stabilize high oxidation states e...

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  8. Assertion : Copper dissolves in dilute nitric acid but not in dilute H...

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  9. Assertion : In the series Sc to Zn, the enthalpy of atomisation of zin...

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  10. Assertion : Magnetic moment of Mn^(2+) is less than Cr^(2+) Reason: ...

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  11. Assertion : Cr(VI) in the form of dichromate in acidic medium is a str...

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  12. Assertion : In acidic medium, K2Cr2O7 exists as Cr2O7^(2-) (orange) wh...

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  13. Assertion : Iron(III) catalyses the reaction between iodide and persul...

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  14. Assertion : KMNO4 acts as an oxidising agent in acidic, basic or neutr...

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  15. Assertion : Zr and Hf occur together in nature andare difficult to sep...

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  16. Assertion : Ce^(4+) is good analytical reagent. Reason: Ce^(4+) has ...

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