The main component of CNG is: MCQ with Answer and Explanation

Explanation:
J.J. Thomson proposed the 'plum pudding' model (also called watermelon model) where the atom was considered a sphere of positive charge with electrons embedded like seeds. Rutherford's gold foil experiment disproved this by showing a dense, positively charged nucleus. Dalton proposed the indivisible atom theory. Bohr gave the model with discrete energy levels. Thomson discovered the electron but couldn't explain the nucleus.

Explanation:
An amalgam is an alloy of mercury with another metal. For example, sodium amalgam is used as a reducing agent; dental amalgam contains mercury, silver, tin, and copper. Bronze is Cu+Sn, brass is Cu+Zn, solder is Pb+Sn.

Explanation:
m₁/m₂ = E₁/E₂ where E = atomic mass / valency. This is Faraday's second law of electrolysis. It relates mass to chemical equivalent.