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Which of the following combination will ...

Which of the following combination will produce `H_(2)` gas ?

A

Fe metal and cone. `HNO_3`

B

Cu metal and cone. `HNO_3`

C

Zn metal and NaOH(aq)

D

Au metal and NaCN(aq) in the presence of air

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KVPY PREVIOUS YEAR-MOCK TEST 6-EXERCISE
  1. In the following reactions,

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  2. Potassium has a bcc structure with nearest neighour distance 4.52 Åits...

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  3. A 0.6gm sample consisting of only CaC(2)O(4) and MgC(2)O(4) is heated ...

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  4. Formation of polyethylene from calcium carbide takes place as follows ...

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  5. Which of the following, when mixed, will give a solution with pHgt7 ?

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  6. Calculate the freezing point of a solution containing 8.1 g of HBr in ...

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  7. Consider the following reactions: MX(4)+X'(2) to MX(4)X(2)' If ato...

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  8. A compound 'X' on ozonolysis followed by reduction gives an aldehyde, ...

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  9. The correct order of magnetic moments (spin values in B.M.) among is:

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  10. The ammonia evolved from the treatment of 0.03 g of an organic compoun...

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  11. In an electrolysis experiment, current was passed for 5h through two c...

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  12. Based on the given diagram, which of the following statements regardin...

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  13. The rate constant for the decomposition of a certain substance is 2.8...

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  14. Which of the following combination will produce H(2) gas ?

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  15. For the following molecules : PCl(5), BrF(3), IC l(2)^(-), XeF(5)^(-...

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  16. Which of the following expression is correct for packing fraction of N...

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  17. Two metals X and Y form covalent halides.Both halides can act as Lewis...

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  18. Among [Ni(CO)(4)], [NiCl(4)]^(2-), [Co (NH(3))(4) Cl(2)] Cl, Na(3) [C...

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  19. A mixture of CuSO(4).5H(2)O" and "MgSO(4). 7H(2)O was heated until all...

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  20. For the reaction Ag(CN)(2)^(ɵ)hArr Ag^(o+)+2CN^(ɵ), the K(c ) at 25^...

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