Which of the following features of metal is NOT Correct?

The correct answer is Option (2) → All metals have same reactions with water as they have with dilute acid.

The question asks for the statement that is not true of metals.

Option (1) Metals combine with oxygen to form basic oxides. — True of metals (Incorrect). Metal oxides such as sodium oxide and magnesium oxide are basic; a few, like aluminium oxide and zinc oxide, are amphoteric.

Option (2) All metals have same reactions with water as they have with dilute acid. — Not true (Correct). Metals react far more readily with dilute acids than with water. Zinc and iron do not react with cold water, yet they give hydrogen gas with dilute hydrochloric acid; magnesium reacts only slowly with hot water but fast with dilute acid.

Option (3) Metals can form positive ions by losing electrons to non-metals — True of metals (Incorrect). In forming ionic compounds such as sodium chloride, a metal atom gives electrons to the non-metal and becomes a positive ion.

Option (4) Metals are lustrous, malleable, ductile and are good conductors of heat and electricity. — True of metals (Incorrect). These are the general physical properties of metals, with a few exceptions such as mercury, which is a liquid.