MCQ
Alkyl halides can be converted into Grignard reagents by
- ABoiling them with $Mg$ ribbon in alcoholic solution
- ✓Warming them with magnesium powder in dry ether
- CRefluxing them with $MgC{l_2}$ solution
- DWarming them with $MgC{l_2}$
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($A$) a high activation energy usually implies a fast reaction.
($B$) rate constant increases with increase in temperature. This is due to a greater number of collisions whose energy exceeds the activation energy.
($C$) higher the magnitude of activation energy, stronger is the temperature dependence of the rate constant.
($D$) the pre-exponential factor is a measure of the rate at which collisions occur, irrespective of their energy.

