CBSE Class 11 Chemistry

  • CBSE Class 11 Chemistry The s Block Elements Online Test Set B

    CBSE Class 11 Chemistry The s Block Elements Online Test Set B. Students can practice Free online mock tests for Chemistry for all topics|chapters. Practice thousands of multiple choice questions created by Chemistry experts & teachers, You can get instant results and also download certificate...

  • CBSE Class 11 Chemistry The s Block Elements Online Test Set A

    CBSE Class 11 Chemistry The s Block Elements Online Test Set A. Students can practice Free online mock tests for Chemistry for all topics|chapters. Practice thousands of multiple choice questions created by Chemistry experts & teachers, You can get instant results and also download certificate...

  • CBSE Class 11 Chemistry Hydrogen Online Test Set B

    CBSE Class 11 Chemistry Hydrogen Online Test Set B. Students can practice Free online mock tests for Chemistry for all topics|chapters. Practice thousands of multiple choice questions created by Chemistry experts & teachers, You can get instant results and also download certificate for passing...

  • CBSE Class 11 Chemistry Hydrogen Online Test Set A

    CBSE Class 11 Chemistry Hydrogen Online Test Set A. Students can practice Free online mock tests for Chemistry for all topics|chapters. Practice thousands of multiple choice questions created by Chemistry experts & teachers, You can get instant results and also download certificate for passing...

  • CBSE Class 11 Chemistry Redox Reactions Online Test Set A

    CBSE Class 11 Chemistry Redox Reactions Online Test Set A. Students can practice Free online mock tests for Chemistry for all topics|chapters. Practice thousands of multiple choice questions created by Chemistry experts & teachers, You can get instant results and also download certificate for...

Class 11 Chemistry Environmental Chemistry Exam Questions

LEVEL -1

1.Name the region of atmosphere which contains Ozone layer?

Ans: Stratosphere.

 

2. Name the chemical responsible for acid rain?

Ans: Oxide of Sulphur , Oxide of Nitrogen.

 

3.What is CFC stand for ?

Ans: Chlorofluorocarbon or Freons.

 

4. Name the gases responsible for green house effect?

 


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Class 11 Chemistry Hydrocarbons Exam Questions

LEVEL – 1

1. Why is cyclproprane more reactive than propane?

Ans: In Cyclopropane,bond angle is 60o which is much less compared to the normal tetrahedral bond angle of 109.5o for sp3 hybridized carbon. Therefore, the molecule is very much strained and hence reactive.

 

2. Why is Wurtz reaction not preferred for preparation of alkanes containing odd no of carbon atoms?

 


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Class 11 Chemistry Organic Chemistry Some Basic Principles and Techniques Exam Questions

LEVEL – 1

1. Suggest a method to purify a liquid which decomposes at its boiling point?

Ans: The process Distillation Under reduced pressure is used to purify aliquid which decomposes at its boiling point.

 

2. How will you separate a mixture of O-nitrophenol and P-nitrophenol?

Ans: O-nitrophenol is steam volatile therefore it can be separated by Steam distillation.

 

 


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Class 11 Chemistry The p Block Element Exam Questions

LEVEL – 1

1. Why is boron used in nuclear reactions?

Ans: Because Boron can absorb neutrons .

 

2. By giving a balanced equation show how B(OH) behaves as an acid in water.

Class 11 Chemistry The p Block Element Exam Questions

 


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Class 11 Chemistry The s Block Element Exam Questions

LEVEL – 1

1. Name the alkali metal which form superoxide when heated in excess of air.
Ans: Potassium
 
2. LiCl is more soluble in organic solvent, why?
Ans: It is due to covalent in nature.
 

 


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Class 11 Chemistry Hydrogen Exam Questions

LEVEL – 1

1.What happens when peroxydisulphuric acid is hydrolysed with water?

Ans: Sulphuric acid and hydrogen peroxide.

 

2. Name the gases produced when water reacts with:

(a) Aluminium nitride

(b) Aluminium carbide

Ans:

(a)ammonia gas is formed

(b) methane is formed

 

 


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Class 11 Chemistry Redox Reactions Exam Questions

LEVEL – 1

1. Define oxidation and reduction in terms of oxidation number.

Ans: Increase in Oxidation Number is Oxidation and decrease in Oxidation Number is called reduction.

 

2. What is meant by disproportionation? Give one example.

Ans: In a disproportionation reaction an element simultaneously oxidized and reduced.

 


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Class 11 Chemistry Equilibrium Exam Questions

LEVEL – I

1. Mention the factors that affect equilibrium constant.

Ans: Temperature, pressure, catalyst and molar concentration of reactants and products.

 

2. What is ionic products of water?

Ans:

 


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Class 11 Chemistry Thermodynamics Exam Questions

LEVEL-1


1. Can the absolute value of internal energy can be determined? Why or why not?

Ans: No, because it is the sum of different types of energies some of which cannot be determined.

 

 


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Class 11 Chemistry States of Matter Structure Exam Questions

LEVEL -1
  
1. At what condition surface tension vanishes?
Ans: At critical temperature.
 
2. Why He is used in balloons in place of hydrogen?
Ans: Due to the incombustible nature of He.
 
3. Below what temp. A gas does not obey ideal gas laws?
Ans: Below Boyle’s Temperature.
 

 


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