Answer: D. Only statement 3 is correct.
Statement 1 is wrong: an alloy is a mixture of a metal with one or more other elements, not a compound. Compounds have fixed composition and chemical bonds between specific elements; alloys vary continuously.
Statement 2 is wrong: metals conduct electricity through delocalised electrons in the metallic structure, not through mobile ions. The cations are fixed in position; only the sea of electrons moves.
Statement 3 is correct: strong metallic bonding gives high melting and boiling points, and the layers of cations can slide past each other (lubricated by electrons), making metals malleable and ductile.
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