Which one of the following is not a borderline element?
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Which among the following is called quicksilver?
Which of the following is NOT a radioactive element?
In water treatment plant, use of chloramines ensures __________
Which of the following is NOT the combined from of carbon?
The number of free electrons in the outermost shell of carbon atoms in diamand is
Which of the following processes will take place the slowest for the same quantity of liquid?
Which of the following elements replaced eka-Aluminium in Mendeleev's Periodic table?