Question

Potassium's reaction with water produces hydrogen gas of

• A. bluish pink.
• B. greenish blue.
• C. orange.
• D. light pink.

Answer 1

The correct option is A bluish pink.

Potassium's reaction with water produces hydrogen gas of bluish pink.
Potassium reacts with cold water and gives potassium hydroxide and hydrogen gas.
$2K+2H_{2}O\to 2KOH+H_2$
The reaction is exothermic and the resulting solution is basic.
The reaction is so vigorous that the evolved hydrogen catches fire spontaneously.