1.

In which of the following substances, does the surface tension increase with an increase in temperature? (A) Copper (B) Molten copper (C) Iron (D) Molten iron

Answer»

Correct Option is (B) Molten Copper

Generally due to surface tension increase with decrease temprature.

In case of molten copper increase in temperature , soluble impurity will increase . So increase in temperature with increase surface tension.

(B) Molten copper



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