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Standard XII

Chemistry

Empirical & Molecular Formula

Assertion :Ni...

Question

Assertion :Nitrous acid $(H N O_{2})$ may act as an oxidising as well as reducing agent. Reason: The oxidation number of nitrogen remains same in all the compounds.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is C Assertion is correct but Reason is incorrect
In nitrous acid ( $H N O_{2}$ ), the nitrogen atom has oxidation state of $+ 3$ .
This is in between the highest oxidation state ( $+ 5$ ) and lowest oxidation state ( $- 3$ ). Thus, nitrous acid can either accept or lose electrons and get reduced or oxidized.
Hence, nitrous acid can act as oxidizing and reducing agent.

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Similar questions

Q. Assertion: The impurities such as

{SiO}_{2}

present in iron ore is removed by

{CaCO}_{3}

.

Reason:

CaO

formed by decomposition of

{CaCO}_{3}

reacts with

{SiO}_{2}

to form slag.

Q. Assertion: The compressibility factor for

H_{2}

and

H e

(1 + \frac{P b}{R T})

Reason: The compressibility factor for

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and

H e

can be derived from Van der Waal's equation.

Assertion (A) Rate constant determined from Arrhenius equation are fairly accurate for simple as well as complex molecules.

Reason (R) Reactant molecules undergo chemical change irrespective of their orientation during collision.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

Assertion: All the points (1, 0), (-1, 0), (2, 0) and (5, 0) lie on the x – axis.
Reason: Equation of the x-axis is y = 0

Choose the correct option.

Assertion (A) Ethanol is a weaker acid than phenol.
Reason (R) Sodium ethoxide may be prepared by the reaction of ethanol with aqueous NaOH.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

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Assertion :Nitrous acid (HNO2) may act as an oxidising as well as reducing agent. Reason: The oxidation number of nitrogen remains same in all the compounds.

Assertion :Nitrous acid $(H N O_{2})$ may act as an oxidising as well as reducing agent. Reason: The oxidation number of nitrogen remains same in all the compounds.