A gas at constant temperature occupies 5 L at 2 atm. What is the volume at 1 atm? MCQ with Answer and Explanation

Explanation:
Ethanol, commonly known as ethyl alcohol, has the chemical formula C₂H₅OH. Methanol is CH₃OH. Acetic acid (ethanoic acid) is CH₃COOH, and propionic acid is C₂H₅COOH. Ethanol is widely used as a solvent, in alcoholic beverages, and as a biofuel.

Explanation:
KCl (potassium chloride) is an ionic (electrovalent) compound formed by transfer of one electron from K to Cl, giving K⁺ and Cl⁻ ions held by electrostatic attraction. CH₄, CCl₄, CO₂ are covalent compounds with electron sharing. Electrovalent compounds have high melting points, conduct electricity in molten/aqueous state, and are generally soluble in water.

Explanation:
Ethane: H₃C-CH₃. There is one C-C single bond and six C-H single bonds, total 7 covalent bonds. Each bond is a sigma bond. The structural formula shows 7 bonds. Methane has 4, propane 10. Counting bonds is simple: each line represents a covalent bond.