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Standard XII

Chemistry

Acidic Nature vs Percentage S Characters

An unknown co...

Question

An unknown compound 'A' has a molecular formula $C_{4} H_{6}$ . When A is treated with an excess of $B r_{2}$ a new substance B with formula $C_{4} H_{6}$ $B r_{2}$ is formed. 'A' forms a white precipitate with ammonical silver nitrate solution. A may be :

butyne-1

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butyne-2

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butene-2

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butene-1

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Solution

The correct option is A butyne-1
$C H_{3} C H_{2} C C H B r_{2} - - \to C H_{3} C H_{2} C B r C H B r$
Thus the compound A is but-1-yne and it on reaction with ammonical silver nitrate produces white ppt. of Tollen's reagent.

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An unknown compound 'A' has a molecular formula $C_{4} H_{6}$ . When 'A' is treated with excess of $B r_{2}$ a new substance with molecular formula $C_{4} H_{6} B r_{2}$ formed. 'A' forms a white precipitate with Tollen's reagent. Then 'A' may be

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An unknown compound 'A' has a molecular formula C4H6. When A is treated with an excess of Br2 a new substance B with formula C4H6Br2 is formed. 'A' forms a white precipitate with ammonical silver nitrate solution. A may be :

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An unknown compound 'A' has a molecular formula $C_{4} H_{6}$ . When A is treated with an excess of $B r_{2}$ a new substance B with formula $C_{4} H_{6}$ $B r_{2}$ is formed. 'A' forms a white precipitate with ammonical silver nitrate solution. A may be :

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Thus the compound A is but-1-yne and it on reaction with ammonical silver nitrate produces white ppt. of Tollen's reagent.