Which of the following group is NOT Dobereiner Triads?
If the first and third members of a Dobereiner triad are Phosphorous and Antimony, the second member of this triad is
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Which of the following allotropes of Carbon is used as a reducing agent in metallurgy?
How many atoms will one mole of Carbon (C-12) contain?
The pH of a solution, whose hydrogen ion concentration is 1 x 10 mole per litre, will be ____.
Which of the following is used for disinfecting drinking water?
Two or more elements combine to form a
Who stated the following law : 'The properties of the elements are the periodic function of their atomic masses'?
Which of the following is NOT the combined from of carbon?
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