Question

Select the correct options for the reaction of metals with cold water.

• A. Potassium- Inert
• B. Magnesium- Moderately reactive
• C. Aluminium- Less reactive
• D. Gold- Highly reactive

Answer 1

Answer: (B), (C)

The correct options are
B Magnesium- Moderately reactive
C Aluminium- Less reactive

Potassium reacts vigorously with cold water, so it is highly reactive and not inert.

Magnesium reacts with hot water but not with cold water. That means it requires some energy to react, so it is moderately reactive.

Aluminium does not react with hot water nor cold water. It reacts only with steam that means it needs more energy. So, it is less reactive.

Gold does not react even with steam, it is considered as an inert metal.