मराठी

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

Advertisements
[object Object]
[object Object]
विषय
मुख्य विषय
अध्याय
Advertisements
Advertisements
Chemistry
< prev  1101 to 1120 of 1512  next > 

What happens when ethyl chloride is treated with aqueous KOH?

Appears in 1 question paper
Chapter: [6] Haloalkanes and Haloarenes
Concept: Hydrocarbons: Alkanes >> Reactions of Haloalkanes - Nucleophilic Substitution Reactions

How the following conversion can be carried out?

Ethyl chloride to propanoic acid.

Appears in 1 question paper
Chapter: [6] Haloalkanes and Haloarenes
Concept: Hydrocarbons: Alkanes >> Reactions of Haloalkanes - Nucleophilic Substitution Reactions

C–Cl bond length in chlorobenzene is shorter than C–Cl bond length in CH3–Cl.

Appears in 1 question paper
Chapter: [6] Haloalkanes and Haloarenes
Concept: Hydrocarbons: Alkanes >> Reactions of Haloalkanes - Nucleophilic Substitution Reactions

SN1 reactions are accompanied by racemization in optically active alkyl halides.

Appears in 1 question paper
Chapter: [6] Haloalkanes and Haloarenes
Concept: Hydrocarbons: Alkanes >> Reactions of Haloalkanes - Nucleophilic Substitution Reactions

Complete the given chemical equations 

`F_2 + 2Cl^(-)`

Appears in 1 question paper
Chapter: [6] General Principles and Processes of Isolation of Elements
Concept: Oxidation Reduction

What happens when HCl is added to MnO2? Write the equations involved

Appears in 1 question paper
Chapter: [6] General Principles and Processes of Isolation of Elements
Concept: Oxidation Reduction

Write the structure of 1-Bromo-4-chlorobut-2-ene

Appears in 1 question paper
Chapter: [6] Haloalkanes and Haloarenes
Concept: Introduction to Haloalkanes and Haloarenes >> Nomenclature

Out of  which is an example of a benzylic halide?

Appears in 1 question paper
Chapter: [6] Haloalkanes and Haloarenes
Concept: Introduction to Haloalkanes and Haloarenes >> Nomenclature

Write the mechanism (using curved arrow notation) of the following reaction:

Appears in 1 question paper
Chapter: [6] Haloalkanes and Haloarenes
Concept: Introduction to Haloalkanes and Haloarenes >> Nomenclature

Why does copper obtained in the extraction from copper pyrites have a blistered appearance?

Appears in 1 question paper
Chapter: [6] General Principles and Processes of Isolation of Elements
Concept: Occurrence of Metals

What is the role of depressants in the froth floatation process?

Appears in 1 question paper
Chapter: [6] General Principles and Processes of Isolation of Elements
Concept: Types of Separation or Concentration of an Ore >> Froth Floatation Method

Write the product(s) in the following reactions:

Appears in 1 question paper
Chapter: [6] Haloalkanes and Haloarenes
Concept: Introduction to Haloalkanes and Haloarenes >> Nomenclature

Write the product(s) in the following reaction:

Appears in 1 question paper
Chapter: [6] Haloalkanes and Haloarenes
Concept: Introduction to Haloalkanes and Haloarenes >> Nomenclature

Write the product(s) in the following reactions: 

Appears in 1 question paper
Chapter: [6] Haloalkanes and Haloarenes
Concept: Introduction to Haloalkanes and Haloarenes >> Nomenclature

Which would undergo SN2 reaction faster in the following pair and why ?

CH3 – CH2 ​– Br and CH3 ​– CH2 ​– I

Appears in 1 question paper
Chapter: [6] Haloalkanes and Haloarenes
Concept: Hydrocarbons: Alkanes >> Reactions of Haloalkanes - Nucleophilic Substitution Reactions

Indicate the principle behind the method used for the refining of Nickel.

Appears in 1 question paper
Chapter: [6] General Principles and Processes of Isolation of Elements
Concept: Refining of Crude Metals

What is the role of dilute NaCN in the extraction of gold ?

Appears in 1 question paper
Chapter: [6] General Principles and Processes of Isolation of Elements
Concept: Types of Separation or Concentration of an Ore >> Leaching

What is 'copper matte' ?

Appears in 1 question paper
Chapter: [6] General Principles and Processes of Isolation of Elements
Concept: Occurrence of Metals

An element X (molar mass = 60 g mol−1) has a density of 6.23 g cm−3. Identify the type of cubic unit cell, if the edge length of the unit cell is 4 ✕ 10−8 cm.

Appears in 1 question paper
Chapter: [6] General Principles and Processes of Isolation of Elements
Concept: Oxidation Reduction

 How would you account the following :

 Transition metals and their compounds show catalytic properties.

Appears in 1 question paper
Chapter: [6] Haloalkanes and Haloarenes
Concept: Hydrocarbons: Alkanes >> Reactions of Haloarenes - Reaction with Metals
< prev  1101 to 1120 of 1512  next > 
Advertisements
Advertisements
CBSE Science (English Medium) इयत्ता १२ Important Questions
Important Questions for CBSE Science (English Medium) इयत्ता १२ Biology
Important Questions for CBSE Science (English Medium) इयत्ता १२ Chemistry
Important Questions for CBSE Science (English Medium) इयत्ता १२ Computer Science (C++)
Important Questions for CBSE Science (English Medium) इयत्ता १२ Computer Science (Python)
Important Questions for CBSE Science (English Medium) इयत्ता १२ English Core
Important Questions for CBSE Science (English Medium) इयत्ता १२ English Elective - NCERT
Important Questions for CBSE Science (English Medium) इयत्ता १२ Entrepreneurship
Important Questions for CBSE Science (English Medium) इयत्ता १२ Geography
Important Questions for CBSE Science (English Medium) इयत्ता १२ Hindi (Core)
Important Questions for CBSE Science (English Medium) इयत्ता १२ Hindi (Elective)
Important Questions for CBSE Science (English Medium) इयत्ता १२ History
Important Questions for CBSE Science (English Medium) इयत्ता १२ Informatics Practices
Important Questions for CBSE Science (English Medium) इयत्ता १२ Mathematics
Important Questions for CBSE Science (English Medium) इयत्ता १२ Physical Education
Important Questions for CBSE Science (English Medium) इयत्ता १२ Physics
Important Questions for CBSE Science (English Medium) इयत्ता १२ Political Science
Important Questions for CBSE Science (English Medium) इयत्ता १२ Psychology
Important Questions for CBSE Science (English Medium) इयत्ता १२ Sociology
Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×