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

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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

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

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Write the structure of the following compound.

Di-sec. butyl ketone

[8] Aldehydes, Ketones and Carboxylic Acids
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
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

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

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

Draw structure of the following derivative.

Acetaldehydedimethylacetal

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

Draw structure of the following derivative.  

Acetaldehydedimethylacetal

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

Draw structure of the following derivative.  

Acetaldehydedimethylacetal

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

Write the structure of the following compound.

Di-sec. butyl ketone

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

Draw the structures 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

Calculate the standard cell potential of a galvanic cell in which the following reaction takes place:

\[\ce{Fe{^{2+}_{(aq)}} + Ag{^{+}_{(aq)}} -> Fe{^{3+}_{(aq)}} + Ag_{(s)}}\]

Calculate the ΔrG° and equilibrium constant of the reaction.

[2] Electrochemistry
Chapter: [2] Electrochemistry
Concept: undefined >> undefined

Why are interstitial compounds well known for transition metals?

[4] d-block and f-block Elements
Chapter: [4] d-block and f-block Elements
Concept: undefined >> undefined

Describe the oxidising action of potassium dichromate and write the ionic equation for its reaction with iron (II) solution.

[4] d-block and f-block Elements
Chapter: [4] d-block and f-block Elements
Concept: undefined >> undefined

Describe the oxidising action of potassium dichromate and write the ionic equation for its reaction with H2S.

[4] d-block and f-block Elements
Chapter: [4] d-block and f-block Elements
Concept: undefined >> undefined

For M2+/M and M3+/M2+systems, the EΘ values for some metals are as follows:

Cr2+/Cr −0.9 V
Mn2+/Mn −1.2 V
Fe2+/Fe −0.4 V
Cr3/Cr2+ −0.4 V
Mn3+/Mn2+ +1.5 V
Fe3+/Fe2+ +0.8 V

Use this data to comment upon:

The ease with which iron can be oxidised as compared to a similar process for either chromium or manganese metal.

[4] d-block and f-block Elements
Chapter: [4] d-block and f-block Elements
Concept: undefined >> undefined

Decide which of the following atomic numbers are the atomic numbers of the inner transition elements:

29, 59, 74, 95, 102, 104

[4] d-block and f-block Elements
Chapter: [4] d-block and f-block Elements
Concept: undefined >> undefined

Compare the general characteristics of the first series of the transition metals with those of the second and third series metals in the respective vertical columns. Give special emphasis on the following point:

Oxidation states

[4] d-block and f-block Elements
Chapter: [4] d-block and f-block Elements
Concept: undefined >> undefined
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