Questions

As a result of wartime production, the average work week for people increased.

The sentence talks about “drought and food security” which has pestered the region and in addition to that the climate and geography has worsened the matter and forced them to come to isolation. “Relegate and downgrade” are the two words which means to move down to a lower position arethe most suitable word to be filled in the blank. “alleviates” which means to make less severe, will not complete the sentence sensibly. “Transgress” which means “to misbehave or to break the law” which does not fit in the context whatsoever.

The Congress of Vienna in 1814 to 1815 led to revolts in France because many people do not want absolute Monarchy.

The atomic mass of an element depends upon the number of protons, electrons and neutrons in the atoms which make the elements.

The founder and also first Chairman of the ISRO is Vikram Sarabhai.

The air around us is a mixture of gases, mainly nitrogen and oxygen, but containing much smaller amounts of water and other gases.

Earth's atmosphere is composed of many gases. Their percentages by volume is given by::

 
78% Nitrogen,

21% Oxygen,

0.9% Argon, and

0.03% Carbon dioxide 

And very small percentages of other elements.