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14 a) pure boiled distilled water in test tube B and add about 1 ml of oil and Cork it .The oil will flow on water and prevent the air from dissolving in the water . Put some anhydrous calcium chloride in test tube C and Cork it . Anhydrous calcium chloride will absorb the moisture from the air
b) The two methods to prevent corrosion of metals are
1)Enviourmental measures
2)Design modification
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