MolSynapsequestion bank

MolSynapse / Question bank / Equivalent Concept and Titration / Equivalent mass and n-factor for acids, bases and salts

JEE Advanced levelOne or more correct optionsDifficulty 3 of 3eq149

Select the correct statements (molar masses: $H X_{3} PO X_{4}$ 98, $Ca (OH) X_{2}$ 74 g/mol).

AThe equivalent mass of $H X_{3} PO X_{4}$ is 98 g/eq when it forms $NaH X_{2} PO X_{4}$
BThe equivalent mass of $H X_{3} PO X_{4}$ is 49 g/eq when it forms $Na X_{3} PO X_{4}$
CThe equivalent mass of $Ca (OH) X_{2}$ is 37 g/eq when it is converted to $CaCl X_{2}$ by HCl
DThe equivalent mass of $Ca (OH) X_{2}$ is 74 g/eq when it is converted to $Ca (OH) Cl$ by HCl

Answer: A, C, D

Equivalent mass = M/n. Forming

NaH X_{2} PO X_{4}

: n = 1, so 98 (true). Forming

Na X_{3} PO X_{4}

: n = 3, so 98/3 = 32.7, not 49 (false).

Ca (OH) X_{2}

to

CaCl X_{2}

: n = 2, so 37 (true). To

Ca (OH) Cl

: only one

OH X^{-}

is replaced, n = 1, so 74 (true).

Practice Equivalent Concept and Titration More on Equivalent mass and n-factor for acids, bases and salts

Previous questionNext question

More questions on Equivalent mass and n-factor for acids, bases and salts