421. By which is the Atmosphere of big metropolition cities is polluted most?
Automobile exhausts
422. Of which treaty was the Third Carnatic War ended?
Parts
423. Who proved that DNA is the basic genetic material?
Hershey and Chase
424. What is exact time taken by the earth for single rotation on its own axis?
23 hrs 56 minutes 4.09 see
425. Which country is land locked?
Bolivia
426. Which Diwan of Travancore started Postal Savings Scheme 1947?
Diwan Raghva Iyer
427. In India, which type of forest occupy the largest area?
Tropical Moist Deciduous Forest
428. In a compound microscope, how is the intermediate image?
eal (B) inverted and magnified
429. Who is the author of “Nisheeth”?
Uma Shankar Joshi
430. Name the Treaty that ended the First World War?
The Treaty of Versailles in 1919