Soap is prepared by the reaction of fats with: MCQ with Answer and Explanation

Explanation:
Ice (solid H₂O) is a molecular solid where molecules are held together by hydrogen bonds and van der Waals forces. Diamond is a covalent network solid. NaCl is ionic solid. Iron is metallic solid. Molecular solids have low melting points, are soft, and are poor conductors. Other examples: dry ice (CO₂), iodine, sugar.

Explanation:
Rutherford bombarded a thin gold foil with alpha particles. Most passed through, but some were deflected, leading to the nuclear model.

Explanation:
Atomic number = 2+8+7=17 (chlorine). Period = number of shells = 3. Valence electrons = 7 → Group 17 (10+7 for p-block). Group 18 has 8 valence electrons.