The hardest natural substance is
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Which of the following is used to get relief when you have been stung by a honeybee?
The major ingredient of sweetened soft drink is
Which one of the following elements has the lowest atomic mass?
Which of the following is the most common kidney stone-forming compound?
Curd contains mainly ___ acid.
The number of valence electrons in an atom of Phosphorous is
Which among the following cannot be included among greenhouse gases?