Questions

James Madison was the one who became President in the future after writing The federalist papers. Alexander Hamilton, James Madison and John Jay were the three who wrote The federalist papers. 

Abu Dhabi (UAE) city has made Hindi as 3rd language in courts.

The world's largest weapons importer is Saudi Arabia.

Isotopes are variations of an element that have the same charge as the original element, but a different mass, which is caused by either more/less neutrons in the nucleus.

Isotopes are atoms of the same element that have different mass numbers.

Example : Hydrogen, Deutirium and tritium all these have different mass but same atomic numbers.

Badrinath is situated on the bank of river Alaknanda.

Space Applications Centre (SAC) is one of the major centres of the Indian Space Research Organisation (ISRO) which is located in Ahmadabad.

SAC focuses on the design of space-borne instruments for ISRO missions and development and operationalisation of applications of space technology for societal benefits. The applications cover communication, broadcasting, navigation, disaster monitoring, meteorology, oceanography, environment monitoring and natural resources survey.