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Statement Oxidation state of H is +1 in ...

Statement Oxidation state of `H` is `+1` in `CuH_(2)` and `-1` in `CaH_(2)`
Explanation `Ca` is strong electropositve metal.

A

`S` is correct but `E` is wrong.

B

`S` is wrong but `E` is correct.

C

Both `S` and `E` are correct and `E` is correct explanation of `S`

D

Both `S` and `E` are correct but `E` is not correct explanation of `S`.

Text Solution

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The correct Answer is:
C
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(A) Oxidation state of 'H' is +1 in CuH_(2) and is -1 "in" CaH_(2) (R ) Ca is stronger electropositive than hydrogen.

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Assertion :- Oxidation state of Hydrogen is +1 in H_(2)O while -1 in CaH_(2) . Reason :- CaH_(2) is a metal hydride and for metal hydrides, hydrogen is assigned the oxidation number of -1 .

Statement Oxidation number of Cu in CuH is - 1 Explanation Cu is placed below H in electro-chemical series.

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Statement 1: The oxidation state of oxygen in superoxide ion in KO_(2),CsO_(2)" and " RbO_(2) is -1/2. Statement 2: Since the oxidation state of an alkali metal in any compound is always +1, the oxidation state of oxygen is -1/2 in the O_(2)^(-) ion.

P BAHADUR-REDOX REACTIONS-Exercise(8) Statement:Explanation type problems
  1. Statement Oxidation number of Cu in CuH is -1 Explanation Cu is plac...

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  2. Statement Oxidation state of H is +1 in CuH(2) and -1 in CaH(2) Expl...

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  3. Statement Oxygen atom in both O(2) and O(3) has oxidation number zero....

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  4. Statement N atom has two different oxidation states in NH(4)NO(2). E...

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  5. Statement 2H(2)O(2)rarr2H(2)O+O(2) is autoredox change. Explanation ...

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  6. Statement Oxidation number of metals in metal carbonyls is zero. Exp...

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  7. Statement SO(2) can be used as reductant as well as oxidant. Explanat...

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  8. Statement KMnO(4) is strong oxidant whereas Mn^(2+) is weaker reductan...

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  9. Statement VO(2)^(+) and VO^(2+) both are called vanadyl ions. Explana...

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  10. Statement In the reactions , 3As(2)S(3)rarr28HNO(3)+4H(2)Orarr6H(3)AsO...

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  11. Statement In acidic medium equivalent weight of K(2)Cr(2)O(7) is 49. ...

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  12. Statement Iodimetric titrations are redox titrations. Explanation The...

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  13. Statement The redox titarations in which liberated I(2) is used as oxi...

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  14. Statement KMnO(4) acts as oxidant as well as self indicator in its tit...

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  15. Statement The equivalence point refers the condition where equivalents...

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  16. Statement The equivalence weight of KMnO(4) when it is converted to K(...

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  17. Statement The number of equivalent per mole of H(2)S used in its oxida...

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  18. Statement Starch is generally used as absorption indicator in iodimetr...

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  19. Statement The oxidation number of an element in its free or uncombined...

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