21. Silane , borane and white phosphorus is highly pyrophoric. So, correct option is : (b) methane
22. I am sure that statement (c) is right. Statement (b) is also correct because it can also oxidise some organic solvents such as benzene.
So, correct option is indeed : (d) b and c
You already marked the correct option.
21. Which is not pyrophoric? (a) Silane, SiH, (6) Methane, CH (0) Borane, B,H (d) White...