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What is the role of zinc metal in the e...

What is the role of zinc metal in the extraction of silver?

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Zinc at as reducing agent.
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XII BOARD PREVIOUS YEAR PAPER ENGLISH-XII BOARDS-Outside Delhi : SET-I
  1. What is the effect of temeperture on chemisorption?

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  2. What is the role of zinc metal in the extraction of silver?

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  3. What is the basicity of H(3)PO(3) ?

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  4. Identify the chiral molecule in the following pair:

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  5. Which out of Buna-S, protein and PVC is a natural polymer ?

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  6. The conversion of primary aromtatic amines in to diazonium salts is kn...

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  7. What are the hydrolysis products of sucrose ?

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  8. Write the structure of p-Methylbenzaldehyde molecule.

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  9. An element with density 2.8 cm^(3) forms a f.c.c unit cell with edge l...

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  10. (i) What type of non stichiometirc point defect is responsible for the...

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  11. How will you distinguish between the following pairs of terms: (i) T...

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  12. State kohlraush law of independent migration ions. Why does the conduc...

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  13. For chemical reaction R rarr P the variation in the concentration (R )...

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  14. Explain the principle of the method electrolytic refining of metal. Gi...

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  15. Complete the following equations:

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  16. Draw the structure of the following : (i) XeF(2) (ii) BrF(3)

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  17. Write the equation involved in the following reaction : (i) Reimer -...

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  18. Write mechanism of the following reaction: CH(3)CH(2)OHoverset(HBr)t...

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  19. Write the name of the monomers used for getting the following polymer ...

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  20. (a) Calculate Delta(r)G^(@) for the reaction Mg(s)+Cu^(2)(aq)rarrMg^(2...

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