The relative densities of zinc, brass, copper, gold and silver are respectively 7.1, 8.5, 8.9,...

JAMB 1980

The relative densities of zinc, brass, copper, gold and silver are respectively 7.1, 8.5, 8.9, 19.3, 10.5. A metal ornament which weighs 0.425kg and can displace 50 x 10^-6m³m of water is made of

A. zinc
B. brass
C. copper
D. gold
E. silver

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Correct Answer: Option B

Explanation

R.D = \(\frac{\text {density of object}}{\text{density of water}}\)

= \(\frac{\frac{0.425}{50 10^-6}{1000}\)

= 8.5

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The relative densities of zinc, brass, copper, gold and silver are respectively 7.1, 8.5, 8.9,...

Correct Answer: Option B

Explanation

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