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shashi kumar

· started a discussion

· 1 Months ago

no (Question: 387464.0 )

wrong answer

Question:

Flux used for soldering is

Options:
A)

Borax

B)

Boric acid

C)

Zinc chloride

D)

Hydrochloric acid

Solution:

Ans: (c)

Gaurav

· commented

· 1 Months ago

50-50 lead & Tin is used ,which is not in option

Knowledge Expert

· commented

· 1 Months ago

Dear Student,

Given answer is correct, As a metallurgical flux. Zinc chloride has the ability to react with metal oxides (MO) to give derivatives of the formula MZnOCl2. This reaction is relevant to the utility of ZnCl2 solution as a flux for soldering — it dissolves oxide coatings, exposing the clean metal surface.

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