401. Which is the lightest gas?
Hydrogen
402. Who made the first strong roads in England with the help of small stones?
John Macadam; an engineer of Scotland
403. Which Diwan was respectfully referred to as 'Valia Diwanji'?
Raja Kesava Das
404. Cromagnan (France) and Grimaldi (ltali) men belonged to which period?
Middle Stone Age
405. Which is the brightest planet?
Venus
406. The pesticide used in foundations of buildings for preventing; termite attack is?
Aldrin
407. Grand Kerala Shopping Festival is Asia's largest shopping festival conducted every year from?
1st December to 15th January
408. Who is the author of Wealth of Nations?
Adam Smith
409. Who is the first Air Chief to receive the honour of “Marshal” ?
Arjun Singh
410. What is the important feature of shifting cultivation?
Change of cultivation site