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Q. ZnSO,4⋅7H2O is the chemical formula of which substance ?
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Q. Electric current is measured by:
Q. Water is a good solvent of ionic salts because:
Q. Which among the following nitrogenous wastes requires the least water for its excretion?
Q. The green colour seen in firework displays is due to the chloride salt of:
Q. Which among the given does not cause pollution
Q. The acid rain destroys vegetations as it contains
Q. Thalassemia is a hereditary disease. It affects
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