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Redox Reactions

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2 months ago

Redox Reactions Class 11th

Match List – I with List – II:

List – I (Oxide) List – II (Nature)

(A) Cl₂O₇ &

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alok kumar singh

Contributor-Level 10

· Cl₂O₇ being non-metallic oxide is acidic in nature.

· Na₂O being metallic oxide is basic in nature.

· Al₂O₃ is an amphoteric oxide

· N₂O is neutral oxide

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Redox Reactions Class 11th

The structure of protein that is unaffected by heating is

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Vishal Baghel

Contributor-Level 10

Primary structure of protein in unaffected by physical or chemical changes.

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2 months ago

Redox Reactions Chemistry NCERT Exemplar Solutions Class 12th Chapter Eight

Among the following structure, which will show the most stable enamine formation?

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Payal Gupta

Contributor-Level 10

Enamines are inter conversible and have low stability with respect to imine. Among all C is most stable due to steric factor.

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Redox Reactions Chemistry NCERT Exemplar Solutions Class 12th Chapter Two

s-block element which cannot be qualitatively confirmed by the flame test is

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Vishal Baghel

Contributor-Level 10

Be does not perform in flame colouration due to highly ionization energy.

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Redox Reactions Chemistry NCERT Exemplar Solutions Class 12th Chapter Five

A dilute solution of sulphuric acid is electrolyzed using a current of 0.10 A for 2 hours to produce hydrogen and oxygen gas. The total volume of gases produced at STP is __________ cm³. (Nearest Integer).

[Given: Faraday constant F = 96500 C mol^-1 at STP, molar volume of an ideal gas is 22.7 L mol^-1]

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Vishal Baghel

Contributor-Level 10

At anode (oxidation)

2H₂O $\to_{}^{}$ O₂ (g) + 4H⁺ + 4e^-

At cathode (Reduction)

2H⁺ + 2e^- $\to_{}^{}$ H₂ (g)

No. of gm- equivalents = $\frac{i * t}{96500} = \frac{0.1 * 2 * 60 * 60}{96500} = 0.00746$

$V_{O_{2}} = \frac{0.00746}{4} * 22.7 = 0.0423 L$

$V_{H_{2}} = \frac{0.00746}{2} * 22.7 = 0.0846 L$ $V_{t o t a l} ≅ 127 m L$

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2 months ago

Redox Reactions Chemistry NCERT Exemplar Solutions Class 12th Chapter One

Which of the given reactions is not an example of disproportionation reaction?

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Vishal Baghel

Contributor-Level 10

It is reduction process, while rest are examples of disproportionation reaction.

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2 months ago

Redox Reactions Chemistry NCERT Exemplar Solutions Class 12th Chapter Eight

On reaction with stronger oxidizing agent like KlO₄,hydrogen peroxide oxidizes with the evolution of O₂. The oxidation number of I in KlO₄, changes to__________.

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Vishal Baghel

Contributor-Level 10

$I O_{4}^{-} + H_{2} O_{2} \to I O_{3}^{-} + O_{2}$

Oxidation number of l in, $I O_{4}^{-} \Rightarrow x + (- 2) * 4 = - 1 ∴ x = + 7$

Oxidation number of in, $I O_{3}^{-} \Rightarrow x + (- 2) * 3 = - 1 ∴ x = + 5$

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Redox Reactions Chemistry NCERT Exemplar Solutions Class 12th Chapter Three

Given below are two statements: One is labeled as Assertion A and other is labeled as Reason R

Assertion A: Permanganate titrations are not performed in presence of hydrochloric acid.

Reason R: Chlorine is formed as a consequence of oxidation of hydrochloric acid.

In the light of the above statements, choose the correct answer from the option given below

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Vishal Baghel

Contributor-Level 10

$2 M n O_{4} + 16 H C l \to 2 M n C l_{2} + 2 K C l + 8 H_{2} O + C l_{2}$

$K M n O_{4}$ oxidizes HCl to Cl₂, so HCl is not used in permanganate titration.

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3 months ago

Redox Reactions Class 11th

40. Best reducing agent is:
(a) He (b) Be (c) Li (d) Al

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Vishal Baghel

Contributor-Level 10

Kindly go through the solution

(c) Li

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Redox Reactions Class 11th

37. Which element is considered to have oxidation number of +3 in all its compounds?

(a) Be (b) Li (c) Al (d) Sc

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Vishal Baghel

Contributor-Level 10

Kindly go through the solution

(c) Al

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