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NEET · Chemistry · STD 11 - 1. Some basic concept of chemistry

\(2\; \mathrm{M}\) જલીય \(\mathrm{NaOH}\)ના દ્રાવણની ઘનતા \(1.28 \;\mathrm{g} / \mathrm{cm}^{3} \) છે, આ દ્રાવણની મોલાલિટી .......\(m\) છે.  [અહીં \(\mathrm{NaOH}\)નું આણ્વિય દળ \(=40 \;\mathrm{g} \mathrm{mol}^{-1}\)]

  1. A \(1.20\)
  2. B \(1.56\)
  3. C \(1.67 \)
  4. D \(1.32\)
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Answer & Solution

Correct Answer

(C) \(1.67 \)

Step-by-step Solution

Detailed explanation

\(2 \mathrm{M}\) solution of \(\mathrm{NaOH}\) means 2 mole \(\mathrm{NaOH}\) is present in \(1 \mathrm{L}\) solution; density \(=1.28 \mathrm{g} / \mathrm{ml}\) mass of solution \(=\) volume of solution \(\times\) density \(=1000 \times 1.28\)
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