Multiple choice

Which of the following statements are false regarding boron?

  1. Boron halides do not form dimers.
  2. Boron is a bad conductor of electricity.
  3. Boron exists in amorphous form only.
  4. The hydroxides and oxides of boron are amphoteric.
  5. The melting and boiling point of boron are lower than that of aliminium.
  6. Boron forms only covalent compounds.

Select the correct answer using codes given below:

  1. 1, 2 and 3

  2. 1, 4 and 6

  3. 2, 3 and 4

  4. 3, 4 and 5

  5. 3, 5 and 6
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Boron exists in two forms-crystalline and amorphous. The hydroxides and oxides of boron are acidic. The melting and boiling point of boron are much higher than that of aluminium.

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