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Question

Number of moles of solute present in 1000 gm of solvent is known as :

A
Normality
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B
Molality
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C
Molarity
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D
Mole fraction
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Solution

The correct option is C Molality
The number of moles of solute present in 1000 gm (or 1 kg) of solvent is known as molality.
Molality = Number of moles of solute Mass of solvent (in kg)
Molarity = Number of moles of solute volume of solution (in L)
Normality = Number of gram equivalents of solute volume of solution (in L)
Mole fraction = Number of moles of solute Number of moles of solute + Number of moles of solvent

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