Question

9. In the following, incorrect about B(2) He(6) is
1) colourless
2) highly toxic gas
3) Catches fire easily on exposure to air
4) diborane readily hydrolysed in water to give O(2) gas​

Answer 1

4) diborane readily hydrolysed in water to give O_2 gas.

Explanation:

Diborane readily hydrolyzes in water to give hydrogen gas and boric acid.