Chemistry MCQs
Practice free Chemistry multiple-choice questions with instant answer feedback and step-by-step solutions. Click an option to check yourself, reveal the full explanation, and work through all 1238 questions — no login required.
Question 316medium
Which one among the following is not a mixture?
Question 317hard
The gas used to dilute oxygen for breathing by deep sea divers is:
Question 318easy
The most abundant element in the human body is
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Question 319medium
The most abundant element in the earth’s atmosphere is
Question 320medium
Select the one which is not a mixture :
Question 321hard
The material used in the manufacture of lead pencil is
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Question 322hard
Water can be separated from alcohol water mixture by
Question 323hard
In addition to hydrogen, the other abundant element present on Sun’s surface is
Question 324hard
The most abundant element by number in the living system is :