Name the novelist who had imagined a journey to the moon, which proved to be a fact soon.

Is there a stone which can float on water? If yes, name it:

Which is the second language spoken by the largest number, after Hindi?

What is the name of the line which separates India from Pakistan?

Where do we find cities named Delhi and Calcutta apart from India?

ഭൂമിയുടെ സ്വയംഭ്രമണ വേഗത (ഭൂമധ്യരേഖ പ്രദേശങ്ങളില്‍) എത്രയാകുന്നു?