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DeepanjaliEnlightened

Asked: September 2, 2021In: Chemistry

Which of the following alloys does not contain copper?

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A. Solder B. Brass C. Bronze D. Bell-metal

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DeepanjaliEnlightened

Asked: August 25, 2021In: Physics

When a copper sphere is headed, maximum percentage change will be observed in:

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A. Radius B. Area C. Volume D. None of these

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DeepanjaliEnlightened

Asked: August 6, 2021In: Chemistry

When isopropyl alcohol vapours are passed over heated copper it gives:

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A. Acetone B. Ethyl alcohol C. Methyl alcohol D. Acetaldehyde

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DeepanjaliEnlightened

Asked: August 4, 2021In: Chemistry

German silver is an alloy of copper and ________.

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A. Zn and Ni B. Al C. Zn D. Fe

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DeepanjaliEnlightened

Asked: August 3, 2021In: Chemistry

Which is known as blister copper?

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A. Pure copper B. 98 ℅ copper C. Ore of copper D. Alloy of copper

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DeepanjaliEnlightened

Asked: July 31, 2021In: Chemistry

Which one is the ore of copper?

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A. Bauxite B. Dolomite C. Haematite D. Chalcopyrite