Soap scum is formed due to the reaction of soap with: MCQ with Answer and Explanation

Explanation:
Chlorine forms hypochlorous acid (HOCl) which is a strong oxidizing agent that destroys bacteria and viruses. It does not remove particles (filtration does) or dissolved salts.

Explanation:
Most alpha particles passed through, but a few deflected at large angles, indicating a dense, positively charged nucleus. The proton was later identified by Rutherford. Electron discovered by Thomson; neutron by Chadwick.

Explanation:
In an electrochemical cell, reduction (gain of electrons) always occurs at the cathode, regardless of whether the cell is electrolytic or galvanic. At the anode, oxidation (loss of electrons) occurs. Memory aid: 'RED CAT' (REDuction at CAThode), 'AN OX' (OXidation at ANode). In electrolysis, the cathode is connected to the negative terminal of the battery, attracting cations which get reduced.