A molecule is defined as the smallest particle of a substance that can exist independently and retain its: MCQ with Answer and Explanation

Explanation:
In electrolysis, the external power source forces non-spontaneous reactions. Electrons are drawn away from the anode, making it positive. Thus anode is connected to the positive terminal. In a galvanic (voltaic) cell, anode is negative. Remember: electrolytic cell – anode positive; oxidation still occurs at anode. Electroplating uses this setup: object to be plated is cathode, source metal is anode.

Explanation:
Sublimation is the transition of a substance directly from the solid to the gas state without becoming an intermediate liquid. Condensation is gas to liquid, evaporation is liquid to gas at any temperature, and fusion is solid to liquid. Common examples include camphor, naphthalene, and dry ice.

Explanation:
Natural gas is predominantly methane (CH₄), typically 70-95%. Ethane, propane, butane are minor components. CNG is compressed natural gas.