Which of the following group is NOT Dobereiner Triads?
What are Aldehydes ?
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Which of the following green house gases has the greatest heat-trapping ability?
Glycol is used to manufacture which of the following ?
Sour taste of lemon is due to the presence of which of the following ?
Chemical properties of isotopes .............
Atomic number of an atom gives the number of which of the following ?
Limestone is a raw material used by which industry?
Fire extinguishers emit which gas?