15. Name a metal which : I. Will react vigorously with cold water II. Will react with only hot water. III. Will only react with steam. IV. Will not react with water or even with steam.

15. Name a metal which : I. Will react vigorously with cold water II.

1.	15. Name a metal which : I. Will react vigorously with cold water II. Will react with only hot water. III. Will only react with steam. IV. Will not react with water or even with steam.
Answer» i. Sodium II. MAGNESIUM iii. ZINC iv. COPPER