The dry ice is _________

Bituminous is a common type of _________

What forms when boron combines with caustic soda?

Which of the following is true regarding reducing character?

Which of the following is an amorphous allotrope of carbon?

Complex formation is more likely to be possible in ______

Which of the following is a colourless gas?

All the oxides and hydroxides of Boron family are ________ in nature.