Which of the following is not properly matched?

Formaldehyde- Carcinogenic

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Sulphur dioxide- Respiratory problems

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Nitrogen oxide- Brown air

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Mean annual temperature of Earth- 25

^{o}

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Solution

The correct option is D Mean annual temperature of Earth- 25 $^{o}$ C
Formaldehyde is carcinogenic to humans based on higher risks of nasopharyngeal cancer and leukemia.
Short-term exposure of sulphur dioxide may cause long-term respiratory effects.
Nitrogen dioxide is a reddish-brown gas with a pungent, irritating odour and is a prominent air pollutant.
The average temperature of Earth according to NASA figures is 15°C and not 25°C.
Therefore, the correct answer is option D.

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Similar questions

Which of the following is not a greenhouse gas?

(a) carbon dioxide

(b) nitrous oxide

(d) nitrogen

0 - 25^{o}

10^{o}

Give reasons for the following :

(a) An excess of carbon dioxide increases the temperature of the earth.

(b) Soda acid and foam type of fire extinguishers are not used for extinguishing electrical fires.

26^{o}

63

9^{o}

Name :

(a) a nitrate of metal which on heating does not give nitrogen dioxide.

(b) a nitrate which on heating leaves no residue behind.

(d) a metal nitrate which on heating is changed into metal.

(e) a solution which absorbs nitric oxide.

(f) the oxide of nitrogen which turns brown on exposure to air. How is it prepared ?

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