Questions

This orbital velocity at the moon is less because orbital velocity = rg

where 'r ' is the orbital radius. i.e the distance of the body from the center of the earth and 'g' is the acceleration due to gravity on the body in question. In the case of the moon, both r and g are less than in the case of the earth.

The acid used in lead storage cells is Sulphuric acid. They are used car batteries. Lead-acid batteries are capable of being recharged, which is important for their use in cars.

"National Volunteer Day" & "International Peace Day" are observed on 21st september every year.

It is one of the operation of Log Shipping

Sublimation is a process when a solid changes directly into gas instead changing into liquid first. Dry ice is an example of Sublimation process because it doesn't change into liquid CO2 and directly change into gaseous CO2 when heated.

Hence, Dry ice is an example of Sublimation process. 

BP Kanungo was appointed as Deputy Governor in Reserve Bank of India (RBI) for three years. The Appointments Committee of Cabinet (ACC) has approved his appointment to the post with effect from the date of taking over the charge on or after April 3, an order issued by Personnel Ministry said. He has been appointed in place of R Gandhi, it said.
Kanungo was in March last year appointed as Executive Director in the central bank.