The mass of a substance deposited at the cathode is directly proportional to the: MCQ with Answer and Explanation

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:
A lead-acid battery, commonly used in automobiles, consists of lead anodes and lead dioxide cathodes. The electrolyte used is an aqueous solution of sulfuric acid (H2SO4). During discharge, the acid is consumed to form lead sulfate and water, decreasing the density of the electrolyte.

Explanation:
LPG (propane/butane) is odorless. A small amount of strong-smelling mercaptan (ethanethiol) is added to help detect gas leaks, preventing accidents. Natural gas also has odorant. Mercaptans contain sulfur, and their smell is detectable at very low concentrations. Calorific value, temperature, performance are unaffected. Safety is primary.