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Catalysis

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Question

Write chemical equations for the following reactions :
(i) Propanone is treated with dilute $B a {O H}_{2}$ .
(ii) Acetophenone is treated with $Z n (H g) / C o n c . H C l$
(iii) Benzoyl chloride is hydrogenated in presence of $P d / B a S O_{4}$

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Solution

(i)When propanone is treated with dil.barium hydroxide since it have $α$ hydrogen it will undergo self aldol condensation reaction via

(ii) Ketone or aldehyde when treated with $Z n (H g) / C o n c . H C l$
gets reduced to alkane. The carbonyl group gets reduced and this reaction is known as Clemmensen's reduction.

(iii) $H_{2}, P d / B a S O_{4}$ is a typical reagent for Rosenmund reaction which does the selective reduction of acid chloride to aldehyde for benzoyl chloride. The reaction is:

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Similar questions

Q. Write chemical equations for the following reactions :
(i) Propanone is treated with dilute

B a {O H}_{2}

.
(ii) Acetophenone is treated with

Z n (H g) / C o n c . H C l

(iii) Benzoyl chloride is hydrogenated in presence of

P d / B a S O_{4}

Q. Give balanced chemical equations for the following reactions:
(i) Fluorine is passed through cold, dilute

N a O H

solution.
(ii) Hydrogen peroxide is treated with acidified

K M n O_{4}

solution.
(iii) Sulphuric acid is treated with hydrogen sulphide.

Q. (i) What happens when zinc granules are treated with dilute solution of

H_{2} S O_{4}

? Also write the chemical equations if reaction occurs.

(ii) What happens when zinc granules are treated with dilute solution of HCl? Also write the chemical equations if reaction occurs.

(iii) What happens when zinc granules are treated with dilute solution of

H N O_{3}

? Also write the chemical equations if reaction occurs.

(iv) What happens when zinc granules are treated with dilute solution of NaCl? Also write the chemical equations if reaction occurs.

(v) What happens when zinc granules are treated with dilute solution of NaOH? Also write the chemical equations if reaction occurs.

Q. Hydrogenation of benzoyl chloride in the presence of Pd and

B a S O_{4}

Hydrogenation of benzoyl chloride in the presence of Pd supported on $B a S O_{4}$ gives

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