Why is the amount of gas collected in one of the test tubes in image double of the amount collected in the other ? Name this gas.
Water $(H_2O)$ contains two parts hydrogen and one part oxygen. Therefore, the amount of hydrogen and oxygen produced during electrolysis of water is in a $2 : 1$ ratio. During electrolysis, since hydrogen goes to one test tube and oxygen goes to another, the amount of gas collected in one of the test tubes is double of the amount collected in the other.
Why do we apply paint on iron articles ?
Explain the ''Rancidity'' terms with one example.
Why is respiration considered an exothermic reaction ? Explain.
$Fe _{2} O _{3}+2 Al \rightarrow Al _{2} O _{3}+2 Fe$
The above reaction is an example of a
Explain the ''Corrosion'' terms with one example.