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

\(100\) मोलल जलीय विलयन में विलेय का मोल-प्रभाज....................\(\times 10^{-2}\) है। (निकटतम पूर्णांक तक) [दिया है : परमाण्विय द्रव्यमान : \(H : 1.0\, u ,\,\, O : 16.0\, u\) ]

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