1.Name the gas used to extinguish fire?
2.Mainly which gas is present in gobar gas?
3.Which non -metal remains liquid at room temperature?
4.Which gas is called laughing gas?
5.Name the alloy of iron, chromium and nickel?
6.Which metal is kept under kerosine?
7.Name the metal used in storage batteries?
8.What is the common name of sodium carbonate?
9.Which metal is used in pencils?
10.Name the metal used as the filament of an electric bulb?
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