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 73medium
The mass number of an atom is equal to
Question 74medium
The maximum number of covalent formed by nitrogen is
Question 75easy
The formula C6H5-CO-CH3 represents
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Question 76hard
The metal that is usually extracted from sea water is
Question 77hard
The method of concentrating the ore which makes use of the difference in density between ore and impurities is called
Question 78easy
The inert gases are ____ in water.
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Question 79easy
The molecular formula of phosphorous is
Question 80hard
The names of the scientists, Newlands, Mendeleev, and Meyer are associated with the development of
Question 81hard
Ozone layer of atmosphere absorbs: