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Why it is not advisable KMnO(4) in cold ...

Why it is not advisable `KMnO_(4)` in cold and concentrated `H_(2)SO_(4)`?

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Because explosive `Mn_(2)O_(7)` is formed.
`2KMnO_(4)+2H_(2)SO_(4)toMn_(2)O_(7)+2KHSO_(4)+H_(2)O`
`2Mn_(2)O_(7)to4MnO_(2)+3O_(2)`.
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RESONANCE-D & F-BLOCK ELEMENTS & THEIR IMPORTANT COMPOUNDS -Exercise 1
  1. Why does AgNO(3) produce a black stain on the skin?

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  2. Why is AgBr used in photography?

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  3. Why it is not advisable KMnO(4) in cold and concentrated H(2)SO(4)?

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  4. What happens when: (a). Green vitriol is strongly heated. (b). Mal...

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  5. State true or false: Reaction of K(2)Cr(2)O(7) with cold and concentra...

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  6. Write balaned chemical equations for: (i) Mixture of K(2)Cr(2)O(7) a...

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  7. What are inner-transition elements? Decide which of the following atom...

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  8. Actinoid contraction is greater from element to element than lanthanoi...

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  9. The chemistry of the actinoid elements is not so smooth as that of the...

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  10. Why Sm^(2+) , Eu^(2+) and Yb^(2+) ions in solution are good reducing a...

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  11. The transition elements have a general electronic configuration:

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  12. The atomic volume of the transition elements are low compared with ele...

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  13. The wrong statement regarding transition metals among the following is...

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  14. First IE of 5d seties element are higher than those of 3d and 4d serie...

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  15. Ionisation energies of Ni and Pt in KJmol^(-1) are given below {:(,u...

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  16. Maximum oxidation state is shown by:

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  17. Which of the following statement is false?

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  18. Which of the following has the maximum number of unpaired d-electron?

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  19. The highest magnetic moments is shown by the transition metal ion wit...

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  20. Magnetic moment of Cr^(+2)(Z=24),Mn^(+2)(Z=25) and Fe^(2+)(Z=26) are x...

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