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Chemistry NCERT Exemplar Solutions Class 11th Chapter Eight

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2 months ago

Chemistry NCERT Exemplar Solutions Class 11th Chapter Eight Class 12th

Which one of the following reactions does not represent correct combination of substrate and product under the given condition?

 
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V
Vishal Baghel

Contributor-Level 10

Kindly consider the following figure

New answer posted

2 months ago

Chemistry NCERT Exemplar Solutions Class 11th Chapter Eight Class 12th

Most stable product of the following reaction is:
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V
Vishal Baghel

Contributor-Level 10

Kindly consider the following figure

New answer posted

2 months ago

Chemistry NCERT Exemplar Solutions Class 11th Chapter Eight Class 12th

A compound 'A' on reaction 'X' and 'Y' produces the same major product but different by product 'a' and 'b'. Oxidation of 'a' gives a substance produced by ants.

'X' and 'Y' respectively are
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V
Vishal Baghel

Contributor-Level 10

Oxidation of HCHO (a) will produce HCOOH, which is produced by ants.

New question posted

3 months ago

Chemistry NCERT Exemplar Solutions Class 11th Chapter Eight Class 12th

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New question posted

3 months ago

Chemistry NCERT Exemplar Solutions Class 11th Chapter Eight Chemistry NCERT Exemplar Solutions Class 12th Chapter Five

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New answer posted

4 months ago

Chemistry NCERT Exemplar Solutions Class 11th Chapter Eight Redox Reactions

Assertion (A) : Redox couple is the combination of oxidised and reduced form of a substance involved in an oxidation or reduction half cell.

(i) Both A and R are true and R is the correct explanation of A.

(ii) Both A and R are true but R is not the correct explanation of A.

(iii) A is true but R is false.

(iv) Both A and R are false
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A
alok kumar singh

Contributor-Level 10

This is a Assertion and Reason Type Questions as classified in NCERT Exemplar

Option (ii) is the correct answer.

A redox couple is defined as pair of compounds or elements having together the oxidised and reduced forms of it and taking part in an oxidation or reduction half reaction.

New answer posted

4 months ago

Chemistry NCERT Exemplar Solutions Class 11th Chapter Eight Redox Reactions

Assertion (A) : The decomposition of hydrogen peroxide to form water and oxygen is an example of disproportionation reaction. 

Reason (R) : The oxygen of peroxide is in –1 oxidation state and it is converted to zero oxidation state in O2 and –2 oxidation state in H2O.

(i) Both A and R are true and R is the correct explanation of A.

(ii) Both A and R are true but R is not the correct explanation of A.

(iii) A is true but R is false.

(iv) Both A and R are false.
0 Follower 3 Views

A
alok kumar singh

Contributor-Level 10

This is a Assertion and Reason Type Questions as classified in NCERT Exemplar

Option (i) is the correct answer.

Here the oxygen of peroxide, which is present in -1 state, is converted to zero oxidation state in O2 undergoing oxidation and decreases to -2 oxidation state in H2O undergoing reduction

New answer posted

4 months ago

Chemistry NCERT Exemplar Solutions Class 11th Chapter Eight Redox Reactions

Assertion (A): In the reaction between potassium permanganate and potassium iodide, permanganate ions act as oxidising agent. 

Reason (R): Oxidation state of manganese changes from +2 to +7 during the reaction. 

(i) Both A and R are true and R is the correct explanation of A. 

(ii) Both A and R are true but R is not the correct explanation of A. 

(iii)A is true but R is false. 

(iv) Both A and R are false.
0 Follower 3 Views

A
alok kumar singh

Contributor-Level 10

This is a Assertion and Reason Type Questions as classified in NCERT Exemplar

Option (iii) is the correct answer

As permanganate ion changes to MnO2

New answer posted

4 months ago

Chemistry NCERT Exemplar Solutions Class 11th Chapter Eight Redox Reactions

In the following questions a statement of assertion (A) followed by a statement of reason (R) is given. Choose the correct option out of the choices given below each question.

Assertion (A) : Among halogens fluorine is the best oxidant.

Reason (R) : Fluorine is the most electronegative atom.

(i) Both A and R are true and R is the correct explanation of A.

(ii) Both A and R are true but R is not the correct explanation of A.

(iii) A is true but R is false.

(iv) Both A and R are false.
0 Follower 7 Views

A
alok kumar singh

Contributor-Level 10

This is a Assertion and Reason Type Questions as classified in NCERT Exemplar

Option (i) is the correct answer.

Fluorine is most electronegative element that is why it is best oxidant among halogens

New answer posted

4 months ago

Chemistry NCERT Exemplar Solutions Class 11th Chapter Eight Redox Reactions

Match the items in Column I with relevant items in Column II.

Column I

Column II

(i) Ions having positive charge

(a) +7

(ii) The sum of oxidation number of all atoms in a neutral molecule.

(b) –1 

(iii) Oxidation number of hydrogen ion (H+).

(c) +1

(iv) Oxidation number of fluorine in NaF.

(d) 0

(v) Oxidation number of fluorine in NaF.

(e) Cation
 

(f) Anion
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A
alok kumar singh

Contributor-Level 10

This is a Matching Type Questions as classified in NCERT Exemplar

(i) → (e); (ii) → (d); (iii) → (c); (iv) → (b); (v) → (f).

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