Some Basic Concepts Of Chemistry Question 261
Question: 1.12 ml of a gas is produced at STP by the action of 4.12 mg of alcohol, with methyl magnesium iodide. The molecular mass of alcohol is [Roorkee 1992; IIT 1993]
Options:
A) 16.0
B) 41.2
C) 82.4
D) 156.0
Show Answer
Answer:
Correct Answer: C
Solution:
$ \underset{1,mol\text{.}}{\mathop{\underset{{}}{\mathop{ROH}},}},+CH _3MgI\to \underset{1\text{ mol}=22400,cc}{\mathop{CH _4+Mg\ \ \ \ \begin{matrix} OR \\ I, \\ \end{matrix}}}, $
1.12 mL is obtained from 4.12 mg \ 22400 mL will be obtained from $ \frac{4.12}{1.12}\times 22400,mg=84.2,g $
