Which of the following compounds has a coordinate bond? MCQ with Answer and Explanation

Explanation:
Propane is an alkane with three carbon atoms: CH₃CH₂CH₃, formula C₃H₈. Methane: CH₄, Ethane: C₂H₆, Butane: C₄H₁₀. Propane is a component of LPG. Alkanes follow CnH₂n+2. For n=3, H=8. Propane is a gas at room temperature, liquefied under pressure. It is used as fuel for heating and cooking.

Explanation:
Gamma rays are high-energy photons emitted from the nucleus when it transitions from excited state to lower energy state. Alpha/beta decay often leaves nucleus in excited state which emits gamma.

Explanation:
Soap is made by saponification: fat/oil (triglyceride) + NaOH → glycerol + sodium salt of fatty acid (soap). This is an alkaline hydrolysis. HCl would break down differently. NaCl is used to precipitate soap (salting out). Ethanol is solvent.