Questions

A pen name is nothing but a nick name used by the writer when publishing books instead of using their real names. 

Kamala Kanta was the pen name of Bankim Chandra Chatterjee who lived from 1838 - 1894. He was a Bengali author, poet who wrote Indian national anthem Vandemataram.

In H2SO4,

Hydrogen has a charge of +2, with each hydrogen has +1.

Oxygen has  a charge of -8, with each oxugen has -2.

Total charge = (2 - 8) = -6

Therefore, the Oxidation number of Sulphur S is '+6' because to make the compound stable.

The British government appointed a commission under the chairmanship of Sir John Simon to report on India's constitutional progress for introducing constitutional reforms as had been promised in 1927.

Controlled railroad crossing includes warning signs, red lights and railway gates, whereas absence of all of these warning signs like red lights and gates includes uncontrolled railroad crossings.