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Q. The 'Green House effect' is produced due to the presence of excess amount of
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Q. A molecule whose electrons are distributed unsymmetrical is said to be
Q. An element found in all organic compounds is
Q. Bauxite is used as raw material by which industry
Q. The ICs used in electronic devices are made up of
Q. Atomic number of an atom gives the number of which of the following ?
Q. Aluminium in the earth's crust is found as
Q. The depletion in Ozone layer is caused by ________ .
Q. Which of the following pairs of reactions always occur together?
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