Q. Which of the following is not properly matched?
A) Formaldehyde – Carcinogenic
B) Sulphur dioxide – Respiratory problems
C) Nitrogen oxide – Brown air
D) Mean annual temperature of earth - $25℃$
Explanation
The temperature of earth in winter season is $1 - 10℃$ while in summer it is $25 - 40℃.$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.