JEE Mains · Chemistry · STD 11 - 1. Some basic concept of chemistry
An aqueous \(\mathrm{KCl}\) solution of density \(1.20 \mathrm{~g} \mathrm{~mL}^{-1}\) has a molality of \(3.30 \mathrm{~mol} \mathrm{~kg}^{-1}\). The molarity of the solution in \(\mathrm{mol} \mathrm{L}^{-1}\) is ..... . (Nearest integer) [Molar mass of \(\mathrm{KCl}=74.5\) ]
- A \(3\)
- B \(2\)
- C \(1\)
- D \(4\)
Answer & Solution
Correct Answer
(A) \(3\)
Step-by-step Solution
Detailed explanation
\(1000\, \mathrm{~kg}\) solvent has \(3.3\) \(moles\) of \(\mathrm{KCl}\) \(1000\, \mathrm{~kg} \text { solvent } \longrightarrow 3.3 \times 74.5\, \mathrm{gm} \mathrm{KCl}\) \(\quad\quad\quad\quad\quad\quad\quad \longrightarrow 245.85\) Weight of solution…
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