Class 12th

This is a multiple choice answer as classified in NCERT Exemplar

(d) Sucralose is an artificial sweetening agent which is 600 times sweeter than sucrose and does not provide calories.

This is a multiple choice answer as classified in NCERT Exemplar

(c) Inhibitors are chemical substances which tend to reduce the activity of a particular enzyme. Generally, a weak bond such as H-bonding, van there Waals interaction, etc. is formed between the enzyme and the inhibitor.

This is a Multiple Choice Questions as classified in NCERT Exemplar

Ans: (C)

Methyl amine reacts with HNO₃ form methanol with release of nitrogen gas and water as side products.

This is a multiple choice answer as classified in NCERT Exemplar

(c) Drugs usually interact with biomolecules such as carbohydrates, lipids, proteins and nucleic acids. These are called drug targets. Vitamins are not a target molecule for drug function in body.

This is a Multiple Choice Questions as classified in NCERT Exemplar

Ans: (D) 

The greater the electron density towards the ring, the greater its basic strength.

The electron withdrawing group reduces basic strength, whereas the electron donating group increases basic strength.

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(c) Polyethyleneglycols are used in the preparation of non-ionic detergents.

This is a Multiple Choice Questions as classified in NCERT Exemplar

Ans: (B) 

Hoffmann invented a method for producing primary amines by treating an amide with bromine in an aqueous or ethanolic sodium hydroxide solution. An alkyl or aryl group migrates from the amide's carbonyl carbon to the nitrogen atom during this degradation reaction.

This is a multiple choice answer as classified in NCERT Exemplar

(b) Liquid dishwashing detergents are non-ionic detergents.

This is a Multiple Choice Questions as classified in NCERT Exemplar

Ans: (B) 

Hoffmann bromamide reaction- it is also called degradation reaction as in this reaction primary amide group is treated with halogen first (Br) then the halogen-substituted amide product is converted to a primary amine with the release of carbon dioxide gas.

This is a multiple choice answer as classified in NCERT Exemplar

(c) Glycerol is added to shaving soap to prevent rapid drying while to enhance the leathering property of soap, a gum called rosin is added to them. It forms sodium rosinate which lathers well.