Chemical Process
Which of the following is an endothermic reaction?

Thermal dissociation of iron pyrites
Both B and C
C + H₂O = CO + H₂
Absorption of SO₃ in 98% H₂SO₄

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Chemical Process
Use of hydrated lime in water treatment

Is to adjust the pH value
All of these
After filtration, combats the corrosive-ness of water due to the presence of O₂ & CO₂
Before filtration, reduces the bacterial load on filters

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Chemical Process
Pick out the wrong statement pertaining to the soap manufacture.

Organic pigments are used as colouring materials in the soap manufacture
Transparent soaps are made by cold process
Both laundary as well as toilet soaps are manufactured by hot process
Colourless rosin is used in the manufacture of laundary soaps

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