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

\(100\) મોલલ જલીય દ્રાવણમાં દ્રાવકનો મોલ અંશ ........... \(\times 10^{-2}\) [આપેલ છે: આણ્વિય દળ : \(H : 1.0 \,u , O : 16.0\, u\) ]

  1. A \(64\)
  2. B \(52\)
  3. C \(44\)
  4. D \(62\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(64\)

Step-by-step Solution

Detailed explanation

\(100\) molal aqueous solution means there is \(100\) mole solute in \(1 kg =1000 gm\) water. Now, mole-fraction of solute \(=\frac{ n _{\text {solute }}}{ n _{\text {solute }}+ n _{\text {solvent }}}\) \(=\frac{100}{100+\frac{1000}{18}}=\frac{1800}{2800}=0.6428\)…
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