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Q. The chemical name of laughing gas is
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Q. The material used in the manufacture of lead pencil is
Q. The liquid waste from kitchens and baths, of residences is known as :
Q. Which one of the following is not radioactive
Q. Which of the following does the nucleus of an atom consists of?
Q. A by product of involuntary muscle contraction and relaxation is
Q. Covalent bonds are mainly found in
Q. The nucleus of an atom consists of
Q. The different isotopes of an element have the same I. Atomic mass II. Atomic number III. Arran...
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