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Chemistry of Ores and Metals


7. 

Consider the 4 statements :
Coke is one of the materials of the charge added to blast furnace for the production of steel/iron. Its function is to
1) act as a reducing agent.
2) remove silica associated with the iron ore
3) function as fuel to supply heat.
4) act as an oxidising agent.
Which of the statements are correct?

Answer : A. 1 and 2 are correct

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8. 

An amalgamation is a mixture of

Answer : D. mercury + metal

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9. 

Which metal is involved in galvanisation process?

Answer : B. zinc

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10. 

Match List I correctly with List II and select your answer using the codes given below:

List I List II
a) Uranium 1) Liquid metal
b) Graphite 2) Radio activity
c) Mercury 3) Alloy
d) Steel 4) Pencil

Answer : B. a-2 ,b-4 ,c-1 ,d-3

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11. 

Which one of the following properties is NOT a characteristic of a metal?

Answer : A. It forms acidic oxides

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12. 

Which of the following is true about hydrogen?
I. Its is a colourless, odourless and tasteless gas.
II. It is lightest of all gases and thus diffuses very rapidly.
III. It is virtually insoluble in water.
IV. Hydrogen is neither acidic nor basic.

Answer : D. I,II,III and IV

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