Read the given passage and answers following questions : A substance which alters the rate. of chemical reaction without itself undergoing any change in mass and chemical composition at the end' of reaction is called catalyst. It may be noted that a catalyst which increase the speed of a reaction are called positive catalyst and catalyst which decrease the speed of reaction are called negative catalyst. The promoters are substances that enhance activity of catalyst and poisons which decrease the activity of catalyst. Amines act as Lewis bases.

Classify the followings into Lewis acids and Lewis bases and show how these act as Lewis acid/base ? F^(-)

Classify the followings into Lewis acids and Lewis bases and show how these act as Lewis acid/base ? OH^(-)

Classify the followings into Lewis acids and Lewis bases and show how these act as Lewis acid/base ? H^(+)

Classify the followings into Lewis acids and Lewis bases and show how these act as Lewis acid/base ? BCl_(3)

Why does ammonia act as a Lewis base ?

Why does ammonia act as a lewis base?

All Bronsted bases are also Lewis bases but all Bronsted acid are not Lewis acids. Explain.

Account for the following: NH_3 acts as a Lewis base.

SOCl_2 can act as a weak Lewis acid as well as a weak Lewis base. Explain.