An element A burns with golden flame in the air. It reacts with another element B, atomic number 17 to give a product C. An aqueous solution of product C on electrolysis gives a compound D and liberates hydrogen. Identify A, B, C and D. Also write down the equations for the reactions involved.

AcademicChemistryNCERTClass 10

Element A is Sodium (Na) because it burns with a golden flame in the air.

Element B is Chlorine for its atomic number is 17.
$2Na +Cl_2 →2NaCl$
Hence, Product C is Sodium Chloride.

On electrolysis of Product C
$2NaCl+ 2H_2O→ 2NaOH+ Cl_2+H_2$
Hence,Product D is Sodium hydroxide.
Updated on 10-Oct-2022 13:27:27