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Theory of Evolution

In the Chalco...

Question

In the Chalcolithic period man used both copper and __________

A

Bronze

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B

Stone

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C

Tin

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D

Zinc

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Solution

The correct option is B
Stone

Stone

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Similar questions

Q. Since both stone and ______________ were used, this period is called the Chalcolithic Age.
a. aluminium
b. copper
c. bronze
d. tin

Q. The alloy bronze contains Copper and Tin. This is a:

Q. Brass is an alloy of copper and zinc; bronze is an alloy containing

80

per cent of copper,

4

16

of tin. A fused mass of brass and brozen is found to contain 74 per cent. of copper, 16 of zinc, and

10

of tin : find the ratio of copper to zinc in the composition of brass.

Q. Bronze is a solid alloy of 88% copper and 12% tin by mass. Brass is an alloy of 95% copper and 5% zinc by mass. Calculate the mole fraction of copper when 100 g of each alloy is mixed together.
(Molar mass of copper = 63.5 g/mol, molar mass of tin = 119 g/mol and molar mass of zinc = 65.5 g/mol)

Aju read a fact that bronze contains 88% copper and 12% tin. So, there will be ___ grams of copper in 200 grams of bronze.

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