Which of the following is the best fire-extinguisher?
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By which of the following processes are metals of high reactivity extracted from purified molten ore?
Which element is generally No Radioactive?
Process of loosing electrons is known as _____.
............ element is represented by the given symbol.
The modern periodic table consists of 18 groups and 7 periods. What is the atomic number of the element placed in the 3rd group and the 4th period?
Which of the following is an example of thermosetting plastic?
Heat is transmitted from higher temperature to lower temperature through the actual motion of the molecules in
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