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

\(KOH\) \((aq.)\)નું \(6.50\) મોલલ દ્રાવણની ઘનતા \(1.89\, g\, cm ^{-3}\) છે. દ્રાવણની મોલારિટી .......... \(mol\, dm ^{-3}\)છે. [પરમાણ્વીય દળ: \(K : 39.0\, u ; O : 16.0 \,u ; H : 1.0\, u ]\)

  1. A \(3\)
  2. B \(4\)
  3. C \(9\)
  4. D \(7\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(9\)

Step-by-step Solution

Detailed explanation

\(6.5\) molal \(KOH =1000\, gm\) solvent has \(6.5\) moles \(KOH\) so wt of solute \(=6.5 \times 56\) \(=364\, gm\) wt of solution \(=1000+364=1364\) Volume of solution \(=\frac{1364}{1.89} m \ell\) Molarity…
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