Common salt (NaCl) is a neutral salt because it is formed from: MCQ with Answer and Explanation

Explanation:
Atomic number (Z) is defined as the number of protons in the nucleus of an atom. It determines the identity of the element. In a neutral atom, the number of electrons equals Z. Mass number = protons + neutrons.

Explanation:
Petroleum (crude oil) is a complex mixture of hydrocarbons including alkanes, cycloalkanes, aromatics, and smaller amounts of other compounds containing sulfur, nitrogen, oxygen. It is separated into fractions by fractional distillation.

Explanation:
The combined gas law integrates Boyle's (P₁V₁ = P₂V₂), Charles' (V₁/T₁ = V₂/T₂), and Gay-Lussac's (P₁/T₁ = P₂/T₂) laws into one equation: P₁V₁/T₁ = P₂V₂/T₂ for a fixed amount of gas. It assumes ideal behavior. When one variable is constant, the respective individual law can be derived. For changing conditions, this combined form is useful. For n moles, PV = nRT.