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 415hard
Which one of the following is a micro-element ?
Question 416hard
Chemical name of bleaching powder is :
Question 417medium
The chemical formula of the laughing gas is
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Question 418medium
The common name for the compound having formal NaOH is
Question 419hard
Philosopher’s wool is chemically
Question 420medium
What is the atomic number of Oxygen?
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Question 421medium
The water pollution in river is measured by the dissolved amount of
Question 422medium
Ultraviolet rays can be used in water treatment as
Question 423hard
Tar roads get damaged if there is