Assertion -Equivalent mass of H3BO3 and Na3BO3 is M3- Reason- Equivalent mass of H3BO3 is M1 and of Na3BO3 is M3-

The correct option is B Assertion is wrong but Reason is correctAs we know, Equivalent #160;mass = molar mass/'n' #160;factor and H_3BO_3 #1 ...

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Byju's Answer

Standard XII

Chemistry

Valency and Oxidation State

Assertion :Eq...

Question

Assertion :Equivalent mass of $H_{3} B O_{3}$ and ${N a}_{3} B O_{3}$ is $\frac{M}{3}$ . Reason: Equivalent mass of $H_{3} B O_{3}$ is $\frac{M}{1}$ and of ${N a}_{3} B O_{3}$ is $\frac{M}{3}$ .

Assertion is correct but Reason is wrong

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Assertion is wrong but Reason is correct

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Both Assertion and reason are correct and reason is correct explanation of assertion.

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Both Assertion and reason are correct but reson is not correct explanation of assertion.

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Solution

The correct option is B Assertion is wrong but Reason is correct
As we know,
$E q u i v a l e n t m a s s = \frac{m o l a r m a s s}{^{'} n^{'} f a c t o r}$
and $H_{3} B O_{3}$ is monobasic acid so, its equivalent mass is $\frac{M}{1}$ .
$N a_{3} B O_{3}$ is a salt having total charge on cation or anion = $3$ so, its equivalent mass is $\frac{M}{3}$ .

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Similar questions

Q. Assertion: In the reaction:

2 N a O H + H_{3} P O_{4} \to N a_{2} H P O_{4} + 2 H_{2} O

The Equivalent weight of

H_{3} P O_{4}

\frac{M}{3}

, where M is its molar mass
Reason: Equivalent weight

= \frac{Molar mass}{n-factor}

Assertion (A) o-nitrophenol is less soluble in water than the m- and p-isomers.
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(b) Assertion and reason both are wrong statements.
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(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.

Assertion (A) Boiling points of alcohols and ethers are high.
Reason (R) They can form intermolecular hydrogen-bonding.
(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.
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Assertion (A) Phenols give o-and p-nitrophenol on nitration with conc. $H N O_{3} a n d H_{2} S O_{4}$ mixture.
Reason (R) - OH group in phenol is o-,p-directing.
(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.
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Reason (R) Nitro group helps in the stabilisation of the phenoxide ion by dispersal of negative charge due to resonance.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
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(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 :Equivalent mass of H3BO3 and Na3BO3 is M3. Reason: Equivalent mass of H3BO3 is M1 and of Na3BO3 is M3.

The correct option is B Assertion is wrong but Reason is correctAs we know,Equivalent mass=molar mass′n′factorand H3BO3 is monobasic acid so, its equivalent mass is M1.Na3BO3 is a salt having total charge on cation or anion = 3 so, its equivalent mass is M3.

Assertion :Equivalent mass of $H_{3} B O_{3}$ and ${N a}_{3} B O_{3}$ is $\frac{M}{3}$ . Reason: Equivalent mass of $H_{3} B O_{3}$ is $\frac{M}{1}$ and of ${N a}_{3} B O_{3}$ is $\frac{M}{3}$ .