46 Importance of organic products

Which of the following statements about aspirin are correct?

(1) It contains an ester group.

(2) It is a painkiller.

(3) Low dose of aspirin prevents heart attack.

• A. (1) and (2) only

• B. (1) and (3) only

• C. (2) and (3) only

• D. (1), (2) and (3)

• A. Amide group

• B. Benzene ring

• C. Hydroxyl group

• D. Ketone group

• A. (1) and (2) only

• B. (1) and (3) only

• C. (2) and (3) only

• D. (1), (2) and (3)

Which of the following statements about detergents are correct?

(1) They are petroleum products.

(2) The hydrophobic tail of detergent molecules can dissolve in grease.

(3) They act as a wetting agent in the cleansing action.

• A. (1) and (2) only

• B. (1) and (3) only

• C. (2) and (3) only

• D. (1), (2) and (3)

• A. (1) and (2) only

• B. (1) and (3) only

• C. (2) and (3) only

• D. (1), (2) and (3)

When vegetable oil is boiled with sodium hydroxide solution, a product mixture is obtained. Then saturated sodium chloride solution is added to the product mixture. A white creamy solid is obtained. Which of the following statements is INCORRECT?

• A. Glycerol forms in the process as a by-product.

• B. The step of adding saturated sodium chloride solution is called ‘salting out’.

• C. The white creamy solid is an ester.

• D. The white creamy solid can be used to remove grease.

A detergent molecule has the following structure.

CH₃(CH₂)₁₀CH₂OSO₃^-Na⁺

Which of the following statements about this detergent is/are correct?

(1) It is a soapless detergent.

(2) It can be made by saponification of vegetable oils.

(3) When the detergent is added to an oil-water mixture, the sodium ions dissolve in water.

• A. (1) only

• B. (2) only

• C. (1) and (3) only

• D. (2) and (3) only

• A. HOCH₂CH(OH)CH₂OH

• B. CH₃(CH₂)₁₆COO^-Na⁺

• C. CH₃(CH₂)₁₆COOCH₃

• D. CH₃(CH₂)₁₆COOH

Grease and oil in ovens are readily removed by concentrated sodium hydroxide solution. Which of the following statements about the reaction involved are correct?

(1) The grease and oil are hydrolysed by concentrated sodium hydroxide solution.

(2) A lot of heat is evolved when concentrated sodium hydroxide dissolves in water.

(3) Concentrated sodium hydroxide solution reacts with grease and oil to give products which are soluble in water.

• A. (1) and (2) only

• B. (1) and (3) only

• C. (2) and (3) only

• D. (1), (2) and (3)

• A

• B

• C

• D