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The emulsifiers in water in oil type emulsions are ________

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The emulsifiers in water in oil type emulsions are ________

(a) Sodium salts

(b) Potassium salts

(c) Oxides

(d) Alkaline earth soaps

The question was asked in examination.

My query is from Classification of Lubricants in chapter Lubricants of Applied Chemistry

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The correct choice is (d) Alkaline earth soaps

Easy explanation: The emulsifiers in water in oil type are alkaline earth metals. Sulphides, sodium and potassium salts are used in oil in water type emulsion. To prepare water in oil type emulsions, 1-10% of water and emulsifiers are added to the oil.

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