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Chemical Process

Chemical Process
Percentage of uranium in carnotite ore found in Jadugoda (Jharkhand) is about

15 to 25
0.1 to 0.5
1 to 5
5 to 10

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Chemical Process
Boiling of water containing temporary hardness produces

CaHCO₃
CaSO₄
None of these
CO₂

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Chemical Process
Very fine suspended and colloidal impurities are removed from water by a process called

Softening
Coagulation
Sedimentation
Disinfection

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Chemical Process
Hydrogenation of oil does not

Remove double bonds
Raise its melting point
None of these
Improve its resistance to oxidation

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Chemical Process
Presence of H₂S in raw water (to be chlorinated) results in the

Reduced softening capacity of zeolite
None of these
Easy removal of its hardness
Increased dosage of chlorine to provide a disinfecting residual in the water

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Chemical Process
Na₂CO₃.10H₂O is called

Soda ash
Slaked lime
Quicklime
Washing soda

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