In which of the following metals is the speed of sound the fastest?

Duralumin is an alloy of copper and

Plumbism is a condition due to the poisoning effect of

Who among the following on April 1, 2014 adopted the Consumer Price Index (CPI) as the key measure of Inflation?

Galvanized iron has a thin coating of

Into which of the following metals does radioactive Uranium decay when it loses all its radioactivity?