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Q. Na+ ion is iso electronic with
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Q. The most abundant gas in the atmosphere is
Q. A mixture of sand and salt can be separated by ?
Q. Which of the following is the purest form of Carbon ?
Q. Which gas emitted by power stations causes acid rain?
Q. The different isotopes of an element have the same I. Atomic mass II. Atomic number III. Arran...
Q. The most common cause of pollution of air is
Q. “Atoms can neither be created nor destroyed.” This principle was given by __?
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