Name the gas used to extinguish fire?
– Carbon dioxide
– Carbon dioxide
Mainly which gas is present in gobar gas?
– Methane
– Methane
Which non -metal remains liquid at room temperature?
– Bromine
– Bromine
Which gas is called laughing gas?
– Nitrous oxide
– Nitrous oxide
Name the alloy of iron, chromium and nickel?
– Stainless steel
– Stainless steel
Which metal is kept under kerosine?
– Sodium
– Sodium
Name the metal used in storage batteries?
– Lead
– Lead
What is the common name of sodium carbonate?
– Washing soda
– Washing soda
Which metal is used in pencils?
– Graphite
– Graphite
Name the metal used as the filament of an electric bulb?
– Tungsten
– Tungsten
What is made from the mixture of lime and chlorine?
-Bleaching powder
-Bleaching powder
Name the gas usually filled in the electric bulbs?
– Nitrogen
– Nitrogen
What is the other name of deuterium oxide?
– Heavy water
– Heavy water
Name the gases used in different types of welding?
– Oxygen and acetylene
– Oxygen and acetylene
What is added to remove permanent hardness of water?
– Washing soda
– Washing soda
Name the metal present in photo films?
– Silver
– Silver
Liquefied Petroleum Gas consists mainly which gases?
– Methane, butane and propane
– Methane, butane and propane
Which element is obtained from sea weeds?
– Iodine
– Iodine
Which gas is used for preparation of soda water?
– Carbon dioxide
– Carbon dioxide
Name the element required for conversion of solar energy?
– Silicon
– Silicon
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