Pure 'X' is a colourless liquid but on standing changes to brown colour.'X' has no action on litmus but forms salt with HCl and H2SO4. It is steam volatile. Then 'X' would be

3 : CCl₄

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3 : CHCl₃

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1 : C₆H₅NO₂

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5 : C₆H₅NH₂

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Solution

The correct option is D
5 : C₆H₅NH₂

Pure aniline is colourless and impurities are formed by oxidation

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Q. Pure 'X' is a colourless liquid but on standing changes to brown colour.'X' has no action on litmus but forms salt with HCl and H2SO4. It is steam volatile. Then 'X' would be

Q. A colourless organic liquid X of molecular formula C₂H₄O₂ turns blue litmus to red. Another colourless organic liquid Y of molecular formula C₃H₆O has no action on any litmus but it is used as a nail polish remover. A yet another colourless organic liquid Z of molecular formula C₂H₆O has also no action on litmus but it is used in tincture of iodine.

(a) Name the liquid X. To which homologous series does it belong? Give the name of another member of this homologous series.
(b) Name the liquid Y. To which homologous series does it belong? Write the name of another member of this homologous series.
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Dry ammonia gas has no action on litmus paper but a solution of ammonia in water turns red litmus paper blue.
Why is it so ?

When a strip of red-brown metal X is placed in a colourless salt solution $Y N O_{3}$ then metal Y is set free and a blue coloured salt solution $X (N O_{3})_{2}$ is formed. The liberated metal Y forms a shining white deposit on the strip of metal X.

(a) What do you think metal X is ?

(b) Name the salt $Y N O_{3}$ .

(d) Name the salt $X (N O_{3})_{2}$ .

(e) what type of reaction takes place between metal X and salt soultion $Y N O_{3}$ ?

Q. An element 'X' is yellow coloured solid, insoluble in water but soluble in carbon disulphide. It has a low melting point

{114.5}^{o} C

. It boils at

445^{o} C

and it burns with pale blue flame forming pungent smelling gas 'Y' which turns moist blue litmus red and finally colourless. 'X' and 'Y' are:

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Pure 'X' is a colourless liquid but on standing changes to brown colour.'X' has no action on litmus but forms salt with HCl and H2SO4. It is steam volatile. Then 'X' would be

The correct option is D 5 : C6H5NH2Pure aniline is colourless and impurities are formed by oxidation

The correct option is D
5 : C₆H₅NH₂

Pure aniline is colourless and impurities are formed by oxidation