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Science (English Medium) इयत्ता १२ - CBSE Question Bank Solutions for Chemistry

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Chemistry
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What type of bonding helps in stabilising the α-helix structure of proteins?

[10] Biomolecules
Chapter: [10] Biomolecules
Concept: undefined >> undefined

Differentiate between  the following:

Fibrous proteins and Globular proteins

[10] Biomolecules
Chapter: [10] Biomolecules
Concept: undefined >> undefined

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Show how the following compound can be converted to benzoic acid.

Ethylbenzene

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

Show how the following compound can be converted to benzoic acid.

Acetophenone

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

Show how the following compound can be converted to benzoic acid.

Bromobenzene

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

Show how the following compound can be converted to benzoic acid.

Phenylethene (Styrene)

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

Predict the products formed when cyclohexanecarbaldehyde reacts with the following reagent.

Tollens’ reagent

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

An organic compound (A) (molecular formula C8H16O2) was hydrolysed with dilute sulphuric acid to give a carboxylic acid (B) and an alcohol (C). Oxidation of (C) with chromic acid produced (B). (C) on dehydration gives but-1-ene. Write equations for the reactions involved.

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

How will you prepare the given compound from benzene? You may use any inorganic reagent and any organic reagent having not more than one carbon atom.

Methyl benzoate

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

How will you prepare the given compound from benzene? You may use any inorganic reagent and any organic reagent having not more than one carbon atom.

m-Nitrobenzoic acid

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

How will you prepare the given compound from benzene? You may use any inorganic reagent and any organic reagent having not more than one carbon atom.

p-Nitrobenzoic acid

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

How will you prepare the given compound from benzene? You may use any inorganic reagent and any organic reagent having not more than one carbon atom.

Phenylacetic acid

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

How will you bring about the following conversion in not more than two steps?

Benazaldehyde to α-Hydroxyphenylacetic acid

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

Complete the synthesis by giving missing starting material, reagent or product.

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

Give the uses of freon 12.

[6] Haloalkanes and Haloarenes
Chapter: [6] Haloalkanes and Haloarenes
Concept: undefined >> undefined

How the following conversion can be carried out?

Isopropyl alcohol to iodoform

[6] Haloalkanes and Haloarenes
Chapter: [6] Haloalkanes and Haloarenes
Concept: undefined >> undefined

How the following conversion can be carried out?

Aniline to phenylisocyanide

[6] Haloalkanes and Haloarenes
Chapter: [6] Haloalkanes and Haloarenes
Concept: undefined >> undefined

Write the structures of the monomers used for getting the following polymers

Melamine – formaldehyde polymer

[15] Polymers
Chapter: [15] Polymers
Concept: undefined >> undefined

Write one difference between Multimolecular colloid and Macromolecular colloid

[5] Surface Chemistry
Chapter: [5] Surface Chemistry
Concept: undefined >> undefined

Write one difference between Sol and Gel

[5] Surface Chemistry
Chapter: [5] Surface Chemistry
Concept: undefined >> undefined
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