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Physics Chemistry

Engineering :: Metallurgy

  Uniformity of zinc coating on pipes is tested by
[A]. Dipping the sample in water[B]. Dipping the sample for 1 minute in conc, hydrochloric acid
[C]. Dipping the sample for 1 minute in neutral copper sulphate solution[D]. Dipping the sample for 10 minutes in calcium hydroxide solution
[E]. By passing electric current for 1 hour    

Answer: Option C
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