Oxide of which of the following will turn red litmus blue?
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Atomic number of which of the following elements is greater than that of Fluorine?
The atoms of the elements having same difference between mass number and atomic number are called ______.
Which of the following is not a Halon gas ?
According to an early Indian philosopher everything is made up of ___ basic elements.
Bronze is an alloy of
Which one of the following is commonly used for pulp bleaching in the paper industry?
Which of the following gases is known as "Laughing Gas"?
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