MCQ
Which of the following compound has lowest boiling point?
- ✓$CH _3 Cl$
- B$C _2 H _5 Cl$
- C$CH _3- CH _2- CH _2- Cl$
- D$C _4 H _9 Cl$
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Assertion $A:$ A mixture contains benzoic acid and napthalene. The pure benzoic acid can be separated out by the use of benzene.
Reason $R:$ Benzoic acid is soluble in hot water.
In the light of the above statements, choose the most appropriate answer from the options given below.

Atomic no. : $Mn = 25,\,Fe = 26,\,Co = 27,\,Ni = 28$