Question

name the colourless gas that evolves when potassium react with water. how will you test this gas​

Answer 1

Answer:

Explanation:

when potassium reacts with water, it forms potassium hydroxide and liberate Hydrogen gas .

We can test the liberated gas by bringing a burning candle near it .Then it will start producing pop sounds which shows the presence of hydrogen gas .

Answer 2

Explanation:

The gas formed is hydrogen gas with potassium hydroxide.

We can test this gas easily by putting a burning candle on the mouth of test tube and if it burns with a Pop sound then it is confirmed that this is a hydrogen gas .

Reaction --

2K + 2H20 ------> 2KOH + H2