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Science (English Medium) कक्षा १२ - CBSE Important Questions for Chemistry

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Chemistry
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Complete the following reactions:

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Aldehydes and Ketones >> Chemical Reactions of Aldehydes and Ketones - Other Reactions

Complete the following reactions:

 

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Aldehydes and Ketones >> Chemical Reactions of Aldehydes and Ketones - Other Reactions

Name the reagents used in the following reactions:

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Acids >> Methods of Preparation of Carboxylic Acids

Why are alkyl halides insoluble in water?

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Physical Properties of Carboxylic Acids

How do you convert the following :

 Ethyne to Ethanal

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Acids >> Nomenclature of Carboxylic Acids

Write the equations involved in the following reactions :

Stephen reaction

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Acids >> Nomenclature of Carboxylic Acids

Predict the products of the following reactions :

\[{CH}_3 - CH = {CH}_2 \to^{i) B_2 H_6}_{ii) 3 H_2 O_2 / {OH}^-} ?\]
Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Aldehydes and Ketones >> Chemical Reactions of Aldehydes and Ketones - Reduction
\[C_6 H_5 - OH \to^{{Br}_2 \left( aq \right)} ?\]
Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Aldehydes and Ketones >> Chemical Reactions of Aldehydes and Ketones - Oxidation

Predict the products of the following reactions :

\[{CH}_3 {CH}_2 OH \to^{Cu/573 K} ?\]
Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Aldehydes and Ketones >> Chemical Reactions of Aldehydes and Ketones - Reduction

Write the IUPAC name of the follow

\[\begin{array}\ce{\phantom{--..}O}\\\ce{\phantom{--..}||}\\ \ce{CH2=CH-C-CH3}\end{array}\]

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Preparation of Aldehydes and Ketones

What happens when Salicylic acid is treated with (CH3CO)2 O/H+?

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Acids >> Chemical Reactions of Carboxylic Acids - Reactions Involving Cleavege of O-H Bond

Predict the main product of the following reactions:
\[\ce{CHO + CH_3CHO->[dil NaOH]}\]

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Introduction of Aldehydes, Ketones and Carboxylic Acids

 Predict the main product of the following reaction:\[\begin{array}{c}
\ce{O\phantom{----}O\phantom{-}}\\
\ce{||\phantom{----}||\phantom{-}}\\
\ce{CH3-C-CH2-C-OCH3}
\end{array}\ce{->[(i)NaBH4][(ii)H+]}\]

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Aldehydes and Ketones >> Chemical Reactions of Aldehydes and Ketones - Reduction

 Why is alpha (α) hydrogen of carbonyl compounds acidic in nature?

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Aldehydes and Ketones >> Chemical Reactions of Aldehydes and Ketones - Reactions Due to α-hydrogen

Give a simple chemical test to distinguish between 
 

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Aldehydes and Ketones >> Chemical Reactions of Aldehydes and Ketones - Nucleophilic Addition Reactions

Write the main product formed when propanal reacts with the following reagents: 
2 moles of 3 CH OH in presence of dry HCl 

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Aldehydes and Ketones >> Chemical Reactions of Aldehydes and Ketones - Nucleophilic Addition Reactions

 Write the main product formed when propanal reacts with the following reagents: 
(ii) Dilute NaOH 
`CH_3CH_2CHO + NaOH(dil)-> `

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Introduction of Aldehydes, Ketones and Carboxylic Acids

Write the main product formed when propanal reacts with the following reagents: 
H2N- NH2  followed by heating with KOH in ethylene glycol.

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Aldehydes and Ketones >> Chemical Reactions of Aldehydes and Ketones - Nucleophilic Addition Reactions

 Arrange the following compounds in increasing order of their property as indicated:
 F - CH2COOH, O2N - CH2 COOH CH3 COOH,HCOOH - acid character. 

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Acids >> Chemical Reactions of Carboxylic Acids - Reactions Involving Cleavege of O-H Bond

 Acetone, Acetaldehyde, Benzaldehyde, Acetophenone – reactivity towards addition of HCN. 

Appears in 1 question paper
Chapter: [8] Aldehydes, Ketones and Carboxylic Acids
Concept: Aldehydes and Ketones >> Chemical Reactions of Aldehydes and Ketones - Nucleophilic Addition Reactions
< prev  1301 to 1320 of 1512  next > 
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CBSE Science (English Medium) कक्षा १२ Important Questions
Important Questions for CBSE Science (English Medium) कक्षा १२ Biology
Important Questions for CBSE Science (English Medium) कक्षा १२ Chemistry
Important Questions for CBSE Science (English Medium) कक्षा १२ Computer Science (C++)
Important Questions for CBSE Science (English Medium) कक्षा १२ Computer Science (Python)
Important Questions for CBSE Science (English Medium) कक्षा १२ English Core
Important Questions for CBSE Science (English Medium) कक्षा १२ English Elective - NCERT
Important Questions for CBSE Science (English Medium) कक्षा १२ Entrepreneurship
Important Questions for CBSE Science (English Medium) कक्षा १२ Geography
Important Questions for CBSE Science (English Medium) कक्षा १२ Hindi (Core)
Important Questions for CBSE Science (English Medium) कक्षा १२ Hindi (Elective)
Important Questions for CBSE Science (English Medium) कक्षा १२ History
Important Questions for CBSE Science (English Medium) कक्षा १२ Informatics Practices
Important Questions for CBSE Science (English Medium) कक्षा १२ Mathematics
Important Questions for CBSE Science (English Medium) कक्षा १२ Physical Education
Important Questions for CBSE Science (English Medium) कक्षा १२ Physics
Important Questions for CBSE Science (English Medium) कक्षा १२ Political Science
Important Questions for CBSE Science (English Medium) कक्षा १२ Psychology
Important Questions for CBSE Science (English Medium) कक्षा १२ Sociology
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