Choose the correct word-phrase from within the brackets to complete the following sentences-i The catalyst used for conversion of ethene to ethane is commonly nickel-iron-cobalt-ii When acetaldehyde is oxidized with acidified potassium dichromate- it forms ester-ethanol-acetic acid-iii Ethanoic acid reacts with ethanol in presence of concentrated H 2 SO 4- so as to form a compound and water- The chemical reaction which takes place is called dehydration-hydrogenation-esterification-iv Write the equation for the reaction taking place between 1- 2-dibromoethane and alcoholic potassium hydroxide-v The product formed when ethene gas reacts with water in the presence of sulphuric acid is ethanal-ethanol-ethanoic acid-

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Standard X

Chemistry

Oxidation

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Question

Choose the correct word/phrase from within the brackets to complete the following sentences:
(i) The catalyst used for conversion of ethene to ethane is commonly ______ (nickel/iron/cobalt).
(ii) When acetaldehyde is oxidized with acidified potassium dichromate, it forms _ (ester/ethanol/acetic acid).
(iii) Ethanoic acid reacts with ethanol in presence of concentrated H₂SO₄, so as to form a compound and water. The chemical reaction which takes place is called (dehydration/hydrogenation/esterification).
(iv) Write the equation for the reaction taking place between 1, 2-dibromoethane and alcoholic potassium hydroxide.
(v) The product formed when ethene gas reacts with water in the presence of sulphuric acid is __ (ethanal/ethanol/ethanoic acid).

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Solution

(i) The catalyst used for conversion of ethene to ethane is commonly nickel.
(ii) When acetaldehyde is oxidized with acidified potassium dichromate, it forms acetic acid.
(iii) Ethanoic acid reacts with ethanol in presence of concentrated H₂SO₄, so as to form a compound and water. The chemical reaction which takes place is called esterification.
(iv) $C_{2} H_{4} {Br}_{2} + \underset{(alcoholic)}{2 KOH} \to C_{2} H_{2} + 2 KBr + 2 H_{2} O$
(v) The product formed when ethene gas reacts with water in the presence of sulphuric acid is ethanol.

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Similar questions

Q. Ethanoic acid reacts with ethanol in presence of conc.

H_{2} S O_{4}

, so as to form a compound and water. The chemical reaction which takes place is called :

Q. Ethanol can be converted to ethene which can then be changed to ethane.
Choose the correct word or phrase from the brackets to complete the following sentences:
(i) The conversion of ethanol to ethene is an example of ........... (dehydration, dehydrogenation).
(ii) Converting ethanol to ethene requires the use of ......... (concentrated hydrochloric acid, concentrated nitric acid, concentrated sulphuric acid).
(iii) The conversion of ethene to ethane is an example of ......... (hydration, hydrogenation).
(iv) The catalyst used in the conversion of ethene to ethane is commonly ............ (iron, cobalt, nickel).

A compound X is obtained by the reaction of alkaline $K M n O_{3}$ with another compound Y followed by acidification. Compound X also reacts with compound Y in presence of few drops of $H_{2} S O_{4}$ to form a sweet smelling compound Z. The compound X, Y and Z are respectively.

Q. (a) What happens when ethanol reacts with ethanoic acid in the presence of a little of concentrated sulphuric acid? Write equation of the reaction involved.
(b) What happens when ethanol is heated with concentrated sulphuric acid at 170°C? Write the equation of the reaction which takes place.

Ethanol can be converted into ethene which can be changed into ethane. Choose the correct word or phrase from the brackets to complete the following sentences.

(a) The conversion of ethanol into ethene is an example of (dehydration, dehydrogenation).
(b) Converting ethanol into ethene requires the use of (conc. HCl, conc. $H N O_{3}, c o n c . H_{2} S O_{4})$ .
(c) The conversion of ethene into ethane is an example of (hydration, hydrogenation).
(d) The catalyst used in the conversion of ethene into ethane is commonly (iron, nickel, cobalt).

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