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Q. Permanent hardness of water can be removed by adding
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Q. The chemical used for cloud seeding for artificial rains is
Q. The compound that IS NOT responsible for acid rain is
Q. Brass gets discolored in air because of the presence of which of the following gases in air?
Q. Aluminium surface are often anodised. This means the deposition of a layer of
Q. The segment of a myofibril that is called a sarcomere runs from
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