Question

When an element ‘X’ with atomic number 11 is made to react with an element ‘Y’ which is a greenish yellow gas, a

compound ‘Z’ is obtained.

a. Identify X ,Y & Z.

b. Specify is this a physical or chemical change with reason.

c. Write the word equation and chemical equation for the above reaction.

d. Balance the equation using dal or coloured bindi in a half sized chart.​

Answer 1

a. x is sodium, y is chlorine and z is sodium chloride

b. This is a chemical change as new products are formed.

c. Sodium+Chlorine=Sodium Chloride

   2Na+Cl2=2NaCl