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State true or false: Reaction of K(2)Cr(...

State true or false: Reaction of `K_(2)Cr_(2)O_(7)` with cold and concentrated `H_(2)SO_(4)` yields bright orange/red precipitate of `CrO_(3)` write reactions invovled.

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Acidified solution of K_(2)Cr_(2)O_(7) on treatment with H_(2)O_(2) yields :

The reaction of NaCl and K_(2)Cr_(2)O_(7) mixture with conc. H_(2)SO_(4) result in the formation of:

The evolution of a red-brown gas on heating a salt with K_(2)Cr_(2)O_(7) and concentrated H_(2)SO_(4) can arise from:

Which of the following on heating with K_(2)Cr_(2)O_(7) and conc. H_(2)SO_(4) with organge red color vapours ?

When a mixture of solid NaCl and solid K_(2)Cr_(2)O_(7) is heated with concentrated H_(2)SO_(4) deep red vapours are obtained.This is due to the formation of:

When K_(2)Cr_(2)O_(7) is converted to K_(2)CrO_(4) , the change in the oxidation state of chromium is

K_(2)Cr_(2)O_(7)+NaoH to CrO_(4)^(2-)

RESONANCE-D & F-BLOCK ELEMENTS & THEIR IMPORTANT COMPOUNDS -Exercise 1
  1. Why it is not advisable KMnO(4) in cold and concentrated H(2)SO(4)?

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

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

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

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

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

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

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

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  9. The transition elements have a general electronic configuration:

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

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

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

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

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  14. Maximum oxidation state is shown by:

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  15. Which of the following statement is false?

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

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

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

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  19. The magnetic moment of .(25)Mn in ionic state is sqrt(15)B.M, then Mn ...

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  20. The colour of transition metal ion is attributed to:

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