Photochemical fluorination is explosive while iodination si too slow to occur.The reason for this is:

Veena observes that during winter setting of milk into curd takes more time while during summer, the same process happens faster. She asks about this difference in time taken to her elder sister. She also asks her sister about why certain reactions occur rapidly while others occur slowly. Her sister explains her about the various factors that affect the rate of chemical reactions. Based on the above scenario, answer the following questions. The reaction of aluminum metal with dilute hydrochloric acid takes place faster as compared to zinc metal. What could be the reason for this difference?

Assertion (A) : Photochemical reactions always occur in the presence of light. Reason (R) : Photochemical reactions do not require activation energy.

Sometimes explosion may occur while distilling ether. It may be due to the presence of

Sometimes explosion may occur while distilling ether. It may be due to the presence of