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Chemical Process

Chemical Process
The most commonly used substance to speed up the sedimentation of sewage is

Sulphuric acid
Lime
Sodium bisulphite
Chlorine

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Chemical Process
Ultimate analysis of coal determines its __________ content.

Carbon, volatile matter, ash & moisture
Carbon, hydrogen, nitrogen & sulphur
Carbon, ash, sulphur & nitrogen
Carbon, sulphur, volatile matter & ash

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Chemical Process
Soaps remove dirt by

None of these
Decreasing wettability
Increasing the surface tension
Supplying hydrophyllic group

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Chemical Process
Nylon-6 as compared to Nylon-66 is having higher

None of these
Melting point
Hardness
Abrasion/resistance

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Chemical Process
Polymerisation product of C₂F4 (carbon tetraflouride) is called P.T.F.E (poly chloro tetra flouro ethylene). It is also called

Epoxy resin
Polyurethane
Silicone
Teflon

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Chemical Process
Which of the following is the most adverse factor challenging the choice of mercury electrolytic cell process for the production of caustic soda?

Non-availability of high purity mercury
High specific gravity of mercury
High cost of mercury
Pollution of water stream by mercury

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