Multiple choice

Which of the following statements are false? P. Halogens are good conductors of heat and electricity. Q. All hydrogen halides are colourless gases. R. Pentahalides are more covalent than trihalides. S. ICl more reactive than I2.

  1. P and Q

  2. P and R

  3. P and S

  4. Q and R

  5. R and S
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Halogens are poor conductors of heat and electricity. HF is a colourless liquid which boils at 19.5°C, while all the other hydrogen halides are colourless gases. HF is a liquid due to the occurrence of extensive hydrogen bonding between their molecules.

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