Which of the following is not an alum?

Which of the following is the correct order for the stability of plus one oxidation State?

What is the second hardest material known?

Which of the following salt has an outcome of blue colour as a result of a borax bead test?

Boron shows a diagonal relationship with ________

Why hydrides of Germanium are known as _________

Bone black is used in the manufacture of pyridine.

Is inorganic benzene reactive than Benzene?