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Standard XII

Chemistry

Introduction to Alcohols

An organic co...

Question

An organic compound 'A' containing C, H and O has a pleasant odour with boiling point of $78^{0} C$ . On boiling 'A' with concentrated $H_{2} S O_{4}$ , a colourless gas is produced which decolourises bromine water and alkaline $K M n O_{4}$ . The organic liquid 'A' is ?

C_{5} H_{5} C l

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C_{2} H_{5} C O O C H_{3}

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C_{2} H_{5} O H

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C_{2} H_{6}

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Solution

The correct option is C $C_{2} H_{5} O H$
The organic liquid A is $C_{2} H_{5} O H$ .

(i) Ethyl alcohol is a colourless liquid with a characteristic pleasant smell,having boiling point ${78.1}^{0}$ C

(ii) $C_{2} H_{5} O H c o n c . H_{2} S O_{4} - ------ \to C H_{2} = C H_{2} D e c o l o u r i s e s B r_{2} w a t e r a n d a l k a l i n e K M n O_{4}$

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An organic compound 'A' containing C, H and O has a pleasant odour with boiling point of 780C. On boiling 'A' with concentrated H2SO4, a colourless gas is produced which decolourises bromine water and alkaline KMnO4. The organic liquid 'A' is ?

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An organic compound 'A' containing C, H and O has a pleasant odour with boiling point of $78^{0} C$ . On boiling 'A' with concentrated $H_{2} S O_{4}$ , a colourless gas is produced which decolourises bromine water and alkaline $K M n O_{4}$ . The organic liquid 'A' is ?