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JEE Main

Exam: JEE Main
Subject: Chemistry
Chapter: Practical Chemistry

JEE Main · Chemistry · Practical Chemistry

A mixture of two salts is not water soluble but dissolves...

A mixture of two salts is not water soluble but dissolves completely in dilute

HCI

to form a colourless solution. The mixture could be:

Options

A ${AgNO}_{3}$ and $KBr$
B ${BaCO}_{3}$ and $ZnS$
C ${FeSO}_{4}$ and~ ${Na}_{2}{CO}_{3}$
DMn $\left({NO}_{3}\right)2$ and ${MgSO}_{4}$

Correct answer

B. ${BaCO}_{3}$ and $ZnS$

Step-by-step solution

${BaCO}_{3} + ZnS$ mixture dissolves in $HCl$ but is insoluble in water. Further,~the solution in $HCl$ will be colourless due to the formation of soluble ${BaCl}_{2}$ and ${ZnCl}_{2}$ .

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