Answer plz asap..

Dear student,
The alcohol can be heated with concentrated sulphuric acid or concentrated phosphoric acid to produce an alkene. It is effectively an E1 elimination reaction since step (2) is the rate determining step.

R2CH-C(OH)R2 --> R2C=CR2 + H2O

 

General Mechanism: Acid-Catalyzed Dehydration of an Alcohol

Step 1: Protonation of hydroxyl group

Step 2:  Ionization to carbocation

Deprotonation to give the alkene


Carbocation is formed in second step, So assertion is not true. Water is a good leaving group.
Therefore correct answer is D 
Regards,
 

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