Question

. What property of hydrogen is observed in the following experiments?

i) Balloon, filled with hydrogen, floats.

ii) Pop sound is heard when a burning splint is introduced at the mouth of

hydrogen filled jar.

iii) When black cupric oxide is heated in a stream of hydrogen, reddish color is
obtained​

Answer 1

Answer:

I think the third one may be correct

Answer 2

Answer:

Hydrogen is light. So hydrogen filled balloons float. ii) Pop sound is due to the combustible property of hydrogen