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Science (English Medium) Class 12 - CBSE Question Bank Solutions for Chemistry

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Chemistry
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Predict the product of reaction of aniline with bromine in non-polar solvent such as \[\ce{CS2}\].

[9] Amines
Chapter: [9] Amines
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Why is aniline soluble in aqueous HCl?

[9] Amines
Chapter: [9] Amines
Concept: undefined >> undefined

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How will you carry out the following conversions?

toluene `->` p-toluidine

[9] Amines
Chapter: [9] Amines
Concept: undefined >> undefined

How will you carry out the following conversions?

p-toluidine diazonium chloride `→` p-toluic acid

[9] Amines
Chapter: [9] Amines
Concept: undefined >> undefined

Match the compounds given in Column I with the items given in Column II.

  Column I   Column II
(i) Benzene sulphonyl chloride (a) Zwitter ion
(ii) Sulphanilic acid (b) Hinsberg reagent
(iii) Alkyl diazonium salts (c) Dyes
(iv) Aryl diazonium salts (d) Conversion to alcohols
[9] Amines
Chapter: [9] Amines
Concept: undefined >> undefined

A colourless substance ‘A’ \[\ce{(C6H7N)}\] is sparingly soluble in water and gives a water soluble compound ‘B’ on treating with mineral acid. On reacting with \[\ce{CHCl3}\] and alcoholic potash ‘A’ produces an obnoxious smell due to the formation of compound ‘C’. Reaction of ‘A’ with benzenesulphonyl chloride gives compound ‘D’ which is soluble in alkali. With \[\ce{NaNO2}\] and \[\ce{HCl}\], ‘A’ forms compound ‘E’ which reacts with phenol in alkaline medium to give an orange dye ‘F’. Identify compounds ‘A’ to ‘F’.

[9] Amines
Chapter: [9] Amines
Concept: undefined >> undefined

Predict the reagent or the product in the following reaction sequence.

[9] Amines
Chapter: [9] Amines
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Discuss briefly, giving an example of the role of coordination compounds in biological systems.

[5] Coordination Compounds
Chapter: [5] Coordination Compounds
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Account for the following:

Ti(IV) is more stable than the Ti (II) or Ti(III).

[5] Coordination Compounds
Chapter: [5] Coordination Compounds
Concept: undefined >> undefined

Draw the structures of the given compound - 3-Bromo-4-phenylpentanoic acid

[8] Aldehydes, Ketones and Carboxylic Acids
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: undefined >> undefined

What is meant by the chelate effect? Give an example.

[5] Coordination Compounds
Chapter: [5] Coordination Compounds
Concept: undefined >> undefined

Draw the structure of the following compound.

3-Bromo-4-phenylpentanoic acid

[8] Aldehydes, Ketones and Carboxylic Acids
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: undefined >> undefined

What is meant by the chelate effect? Give an example.

[5] Coordination Compounds
Chapter: [5] Coordination Compounds
Concept: undefined >> undefined

Draw the structure of the following compound.

3-Bromo-4-phenylpentanoic acid

[8] Aldehydes, Ketones and Carboxylic Acids
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: undefined >> undefined

What is meant by the chelate effect? Give an example.

[5] Coordination Compounds
Chapter: [5] Coordination Compounds
Concept: undefined >> undefined

What is meant by the chelate effect? Give an example.

[5] Coordination Compounds
Chapter: [5] Coordination Compounds
Concept: undefined >> undefined

Draw the structure of the given compound.

3-Bromo-4-phenylpentanoic acid

[8] Aldehydes, Ketones and Carboxylic Acids
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: undefined >> undefined

What is meant by the chelate effect? Give an example.

[5] Coordination Compounds
Chapter: [5] Coordination Compounds
Concept: undefined >> undefined

Discuss briefly, giving an example of the role of coordination compounds in analytical chemistry.

[5] Coordination Compounds
Chapter: [5] Coordination Compounds
Concept: undefined >> undefined

Discuss briefly, giving an example of the role of coordination compounds in extraction/metallurgy of metals.

[5] Coordination Compounds
Chapter: [5] Coordination Compounds
Concept: undefined >> undefined
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