The maximum permissible colour for domestic supplies, on platinum cobalt scale is ?

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Pooja

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📊 Public Health Engineering

Q. The maximum permissible colour for domestic supplies, on platinum cobalt scale is ?

(A) 5 to 10 ppm
(B) 10 to 20 ppm
(C) 20 to 30 ppm
(D) 30 to 40 ppm

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✅ Correct Answer: (B) 10 to 20 ppm

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