Q. Which among the following oxides cause the Acid rain ?
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Q. The pH of fresh groundwater slightly decreases upon exposure to air because
Q. Permanent hardness of water is due to the presence of ?
Q. The chief constituent of gobar gas is
Q. Systematic name for (CuI)s ?
Q. Choose the incorrect pair from the below.
Q. Rutherford’s scattering experiment proved the presence of
Q. A solution turns blue litmus to red. its pH is likely to be .......
Q. Most of the explosions in mines occur due to the mixing of
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