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 55easy
The mineral containing both magnesium and calcium is
Question 56medium
The metal does not give H2 on treatment with dilute HCL is
Question 57hard
The number of g-molecule of oxygen in 6.02 x 1024 CO molecules is
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Question 58medium
The most extensive, commercially useful source of thorium as monazite sand occurs in India at
Question 59easy
The main active constituent of tea and coffee is
Question 60medium
The maximum number of isomers for an alkene with molecular formula C4H8 is
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Question 61medium
The hardest form of carbon is
Question 62easy
The most important ore of aluminium is
Question 63hard
The organic reaction represented by equation CH3 - CH = O + H2NOH gives CH3 - CH - NH + H2O is an example of