Question

78. Which one of the following metals produces hydrogen with cold water? (a) Silver (b) Sodium c) Copper ti (d) Iron​

Answer 1

Answer:

calcium

The metal which reacts with cold water to produce hydrogen is calcium.

Answer 2

The metal which reacts with cold water to produce hydrogen is Sodium.

EXPLANATION:

• This processes is achieved by the exothermic chemical reaction.
• When the sodium(Na) combines with water($H_{2} O$),it gives product as sodium hydroxide($Na(OH)_{2}$) and Hydrogen($H_{2}$).
• Among these 4 options, sodium is the only metal to produce hydrogen.
• Option b is the correct one.