631. Contact process of sulphuric acid manufacture
Yields acid of higher concentration than chamber process
Yields acids of lower concentration than chamber process
Is obsolete
Eliminates absorber
✅ The correct answer is option A.
Chemical Process MCQs
632. Rotary kiln is not involved in the production of
Cement
Lime from limestone
Slaked lime from quick lime
None of these
✅ The correct answer is option C.
633. __________ is used as a flux in the smelting of copper ore like chalcopyrite.
Coke breeze
Lime powder
Silica/quartz
Dolomite
✅ The correct answer is option C.
634. Bromine content in sea water may be around __________ ppm.
70
640
1875
2500
✅ The correct answer is option A.
635. Laboratory glass wares which reacts with hydroflouric acid, are made of the __________ glass.
Lead
Borosilicate
Soda lime
Alkali silicate
✅ The correct answer is option B.
636. __________ glass has the lowest co-efficient of thermal expansion and hence is more heat resistant.
Pyrex
Soda lime
Lead
High silica
✅ The correct answer is option A.
637. Alum is commercially produced from
Gypsum
Feldspar
Galena
Bauxite
✅ The correct answer is option D.