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Transition metals and their compounds sh...

Transition metals and their compounds show catalytic properties because

A

They have comparatively small size

B

The can adopt multiple oxidation states and can from complexes

C

They have high ionisation enthalpy

D

They are coloured

Text Solution

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The correct Answer is:
B
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Account for the following: (i) Copper (I) compounds are white whereas Copper (II) compounds are coloured. (ii) Transition metals and their compounds show catalytic activities. (iii) Zn,Cd,Hg are considered as d-block elements but not as transition elements (iv) Transition metals and many of their compounds show paramagnetic behaviour. (v) Transition metals can form alloy.

Explain gives reason. (a) Transition metal and many of their compounds show paramagnetic behaviour. (b) The enthalpies of atomisation of the transition metal are high . © The transition metals generally from coloured compounds.

Explain giving reason: (a) Transition metals and many of their compounds show paramagnetic behaviour. (b) The enthalpies of atomisation of the transition metals are high. (c). The transition metals gnerally form coloured compounds.

Which of the following statement(s) is/are correct? (A) Transition metals and many of their compounds show paramagnetic behaviour. (B) The enthapies of atomisation of the transition metals are high (B) The transition metals generally form coloured compounds (D) Transition metals and their many compounds act as good catalyst.

AAKASH INSTITUTE-M0ck test 26-EXAMPLE
  1. The electronic configuration of one of the coinage metals is

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  2. In which compound does vanadium has an oxidation number of +4 ?

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  3. Transition metals and their compounds show catalytic properties becaus...

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  4. The common transition metals in brass and bronze is

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  5. Which group elements of first transition series has the highest parama...

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  6. The product formed by the fusion of MnO2 with KHO in the presence of a...

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  7. The number of equivalent Cr-O bonds in CrO4^(2-) is

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  8. Actinoid contraction is more than lanthanoid contraction because

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  9. CrO3 dissolves in aqueous NaOh to give

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  10. Which of the following can be oxidised by acidified K2Cr2O7 ?

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  11. The most common oxidation state exhibited by all lanthanoids is

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  12. The paramagnetic lanthanoid ion among the following is

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  13. The nature of CrO and Cr2O3 is respectively

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  14. Identify the incorrect statement with respect to KMnO4

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  15. Consider the following statements (I) Zr^(4+) and Hf^(4+) have almos...

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  16. The reddish brown gas produced by heating KCl with solid K2Cr2O7 and...

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  17. Chromate ion, CrO4^(2-) is

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  18. When KMnO4 reacts with l^- in a slightly alkaline and acidic medium, t...

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  19. Which of the following characteristic is not the point of similarity b...

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  20. When chromite ore (FeCr2O4) is heated with sodium carbonate in free ac...

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