Boron is used as a __________

Which of the following is not a component of glass?

________ Boron is reactive with air.

Wood Charcoal is an allotrope of _________

which of the following is not a part of the composition of natural gas?

Which of the following is an amorphous allotrope of carbon?

Which of the following is true regarding the acidic character?

What is the colour of silicon?