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Introduction to Acid, Base and Salts

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Question

Choose the correct word/ phrase from within the brackets to complete the following sentences :

(ii) When acetaldehyde is oxidized with acidified potassium dichromate, it forms (ester/ethanol/ acetic acid)

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Solution

When acetaldehyde is oxidized with acidified potassium dichromate, it forms acetic acid.
$C H_{3} C H O K_{2} C r_{2} O_{7} - ---- \to H^{+} C H_{3} C O O H$
Ethanal Acetic acid

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Q. 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).

Q. Choose the correct word or phrase from the brackets to complete the following sentences:
(i) Heating ammonium chloride with sodium hydroxide produces ...... (ammonia, nitrogen).
(ii) Heating solution of ammonium chloride sodium nitrite produces ...... (ammonia, nitrogen).

Q. Choose the correct word/phrase from within the brackets to complete the following sentences

(v) The product formed when ethene gas reacts with water in the presence of sulphuric acid (ethanol/ethanal/ethanoic acid)

Q. Acetaldehyde when oxidized with acidified potassium dichromate, forms :

Q. Choose the correct word/phrase from within the brackets to complete the following sentences

(iii) Ethanoic acid reacts with ethanol in the presence of concentrated

H_{2} S O_{4}

so as to form a compound and water. The chemical reaction which takes place is called (dehydration/hydrogenation/ esterification).

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Introduction to Acid, Base and Salts

Standard IX Chemistry

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