You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard IX

Chemistry

Strong and Weak Acids and Bases

Assertion :1 ...

Question

Assertion :1 mole of phosphorous acid requires $80$ grams of sodium hydroxide for complete neutralisation. Reason: Phosphorous acid is a tribasic acid.

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

No worries! We‘ve got your back. Try BYJU‘S free classes today!

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

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Assertion is correct but Reason is incorrect

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Assertion is incorrect but Reason is correct

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C Assertion is correct but Reason is incorrect
$H_{3} P O_{3}$ , Phosphorous acid or Phosphonic acid is a diprotic acid.

Therefore, it requires $2$ moles $=$ $80$ g of $N a O H$ .

Option C is correct.

Suggest Corrections

Similar questions

Q. Assertion: The compressibility factor for

H_{2}

and

H e

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

Reason: The compressibility factor for

H_{2}

and

H e

can be derived from Van der Waal's equation.

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.

Assertion

Lithium sulphate does not form alums.

Reason

$L i^{+}$ is too small to form a stable lattice required for double-salt/alum formation.

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 : Two electrons of helium atom are placed in only one shell but three electrons of lithium need two shells.
Reason: A shell can have maximum

{2n}^{2}

electrons.

Join BYJU'S Learning Program

Assertion :1 mole of phosphorous acid requires 80 grams of sodium hydroxide for complete neutralisation. Reason: Phosphorous acid is a tribasic acid.

The correct option is C Assertion is correct but Reason is incorrectH3PO3, Phosphorous acid or Phosphonic acid is a diprotic acid. Therefore, it requires 2 moles = 80 g of NaOH.Option C is correct.

Assertion :1 mole of phosphorous acid requires $80$ grams of sodium hydroxide for complete neutralisation. Reason: Phosphorous acid is a tribasic acid.

The correct option is C Assertion is correct but Reason is incorrect
$H_{3} P O_{3}$ , Phosphorous acid or Phosphonic acid is a diprotic acid.

Therefore, it requires $2$ moles $=$ $80$ g of $N a O H$ .

Option C is correct.