811. Ottoman Turks captured Constantinople in ?
1453
812. Petroleum is generally found in which rocks?
Folded marine sedimentary rocks
813. Angular separation between two colours of the spectrum depends upon which thing?
Angle of deviation
814. Who is the author of Ascent of the Everest?
Sir John Hunt
815. What is the cause of inflation?
Increase in money supply and fall in production
816. What is the life of Rajya Sabha?
Permanency
817. What was the primary purpose of a seal in the Indus Valley Civilisation?
To signify ownership of property
818. The famous work - An Essay on the Principle of Population is by ?
Thomas Malthus
819. In which year British merchants exported pepper to England for the first time from Cochin ?
1626
820. Father of tragic dramas?
Aeschilus