Questions

No work done as there is no external external pressure in free expansion. 

Hence, Work done in a free expansion process is Zero.

In Chennai, Tamil Nadu place India's first HIV case reported in 1986 amongst the female sex workers.

Plants grow in size both in height and in girth. Enlargement of cells already present cannnot contribute much to the growth. Only addition of more and more cells could increase the size of the plant considerably.

Hypnosis is a state of human consciousness involving focused attention, reduced peripheral awareness, and an enhanced capacity to respond to suggestion.

It is using a router to answer ARP requests. This will be done when the originating host believes that a destination is local, when in fact is lies beyond router.

Though this is essentially a Committee of the House of the people (Having 15 members from that house), by an agreement between the two houses, 7 members from the other Houses are also associated with this committee, in order to strengthen it.