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JEE CHEMISTRY MCQ: SOME BASIC CONCEPTS OF CHEMISTRY

1 Hard

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Application +4 | -1

Common salt obtained from sea-water contains

8.775 \% \mathrm{NaCl}

by mass. The number of formula units of

\mathrm{NaCl}

present in

25 \mathrm{~g}

of this salt is :

View answer and explanation

Correct option: B

2.258 \times 10^{22}

formula units

Option B (

2.258 \times 10^{22}

formula units) is correct because it is calculated by finding the mass of NaCl in the sample, converting it to moles, and then multiplying by Avogadro's number.

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