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Lassigne's test in not shown by diazoniu...

Lassigne's test in not shown by diazonium salts and hydrazines `(NH_2NH_2)`. Why?

A

form `NH_(3)` gas on heating much before the reaction with sodium

B

form `N_(2)` gas on heating much before the reaction with sodium

C

are highly volatile and evaporate before the reaction with sodium

D

all of the above

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The correct Answer is:
B
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Note: In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices. Assertion : Lassaigne's test is not shown by diazonium salts. Reason : Diazonium salts lose N_2 on heating much before than they have a chance to react with fused sodium.

Calcualte the percentage hydrolysis of 10^(-3)M N_(2)^(o+)H_(5)C1^(Theta) (hydrazinium chloride), salt contining acid ion conjugate to hydrazine base (NH_(2)NH_(2)). K_(b) for N_(2)H_(4) = 1.0 xx 10^(-6) .

What is the difference in oxidation state of nitrogen in between hydroxyl amine (NH_(2)OH) and hydrazine (N_(2)H_(4)) ?

NH_2*NH_2 serve as:

OP TANDON-CHARACTERISATION OF ORGANIC COMPOUNDS -OBJECTIVE QUESTIONS Level-B
  1. Which among the following is not correctly matched with their colour?

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  2. In case, nitrogen sulphur both are present in an organic compound, sod...

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  3. 0.0833 mol of carbohydrate of empirical formula CH(2)O contain 1 g of...

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  4. Kjeldahl's method cannot be used for the estimation of nitrogen in

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  5. 9.9g of amide with molecular formula C(4)H(5)N(x)O(y) on heating with ...

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  6. Lassigne's test in not shown by diazonium salts and hydrazines (NH2NH2...

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  7. 0.256 g of some nitrogenous compound was kjeldahlised and produced 0.1...

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  8. Kjeldahl's method cannot be used for estimation of nitrogen in: (I)...

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  9. Violet coloured complex obtained in the detection of sulphur is:

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  10. Select the organic compounds, which will give red colour in Lassaigne'...

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  11. The desiccants used for absorbing water during Liebig's method for est...

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  12. Which of the following compounds may give blood red colouration while ...

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  13. The desiccants used for absorbing water during Liebig's method for est...

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  14. The empirical formula of a compound is CH2 . To which of the following...

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  15. An organic compound contains about 25% carbon. It could be:

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  16. Pressure of halogen in a compound is tested by:

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  17. The weight of carbon ,hydrogen and oxygen in an organic compound are i...

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  18. Which of the organic compounds will give white precipitate with AgNO(3...

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