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Which gas causes brass to discolor in air?

June 24, 2025June 21, 2025 by Tauqeer Ahmad

(A) Oxygen
(B) Hydrogen Sulphide
(C) Nitrogen
(D) None of these

Categories Combined Competitive Examination-2022 (PMS-2022) (BS-17) 4-06-2023
Which of the following state acceded to Pakistan on 15th August 1947?
The abbreviation “BCC” in email stands for:

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