A qualitative reaction for sulfur dioxide is the discoloration of the aqueous potassium permanganate (KMnO4) solution. When sulfur dioxide is passed through this solution, aqueous sulfuric acid (H2SO4), aqueous manganese(II) sulfate (MnSO4), and aqueous potassium sulfate (K2SO4) are formed.

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.

the transfer of heat by electromagnetic radiation is called thermal radiation . it is usually carried out by electromagnetic waves in an energy range just below the visible spectrum, which is the infrared range.

so the answer would be radiation.

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