Question # 1

On which bases froth floatation process take place?

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Density bases

Concentration basis

Watting basis

None of these

In solvay's process slaked lime is used to:

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Prepare CO₂

Prepare quick lime

Recover ammonia

Form Na₂CO₃

The number of carbon atoms present in diesel oil.

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10-15

11-15

12-15

13-15

Compound of metal exist under earth crust are called.

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Ore

Gangue

Minral

None of these

Urea is nitrogenous fertilizer. It consist of nitrogen.

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26.6 %

36.6%

46.6%

56.6%

Which one of the ore of copper?

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Copper glance

Chalcopyrite

Both a and b

None of these

When NaHCO₃ is heated it forms.

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CO₂

Ca(OH)₂

CaCO₃

CaO

In the bessemerization process.

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Roasted ore is beated.

Molten matte is removed.

Molten matte is heated

Molten matte is added

Catalyst used in Haber's process is:

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Ni

Fe

Cu

Zn

The number of carbon atoms present in fuel oil.

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14-18

15-18

16-18

17-18

Which one of the not metal.

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Copper

Carbon

chromium

Iron

Sindh alkalies limited was established near Karachi in.

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1965

1966

1970

2000

When copper pyrite (CuFeS2) is strongly heated in excess of airit converted into mixture of:

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Cu2S + Cu2O

Cu2O +FeS

Cu2S + FeS

FeO + SO2 + Cu2S

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