Which of the following elements does not belong to the Carbon family?

Which of the following is not a use of orthoboric acid?

Which of the following is the correct reason for the anomalous behaviour of Boron?

Which of the following is known as the Black lead?

What is inorganic benzene?

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

Which of the following is an amorphous allotrope of carbon?

________ Boron is reactive with air.