521. Na₂CO₃.10H₂O is called
Washing soda
Soda ash
Slaked lime
Quicklime
✅ The correct answer is option A.
Chemical Process MCQs
522. Pig iron is produced by blast furnaces in India using mostly the iron ore named
Hematite
Magnetite
Siderite
Chalcopyrite
✅ The correct answer is option A.
523. Sulphur addition in soap is done to
Improve the soap texture
Cure pimples & dandruff
Fasten lather formation
Increase its cleansing action
✅ The correct answer is option B.
524. Esterification reaction
Produces soap
Is reversible
Is a reaction between an alcohol and an organic acid
All of the above
✅ The correct answer is option D.
525. __________ are used as corrosion inhibitor for iron & steel in aqueous solutions.
Phosphates
Chromates
Sulphates
Bi-carbonates
✅ The correct answer is option B.
526. Sudden temperature fluctuation does not affect pyrex glass, because of its
Low co-efficient of expansion
High co-efficient of expansion
High melting point
Both B and C
✅ The correct answer is option A.
527. In industrial nomenclature, alcohol means
Butyl alcohol
Propyl alcohol
Ethanol
Methyl alcohol
✅ The correct answer is option C.
528. A mineral is termed as ‘ore’, if
A metal can be economically extracted from it
It contains ≥ 40% metal
The metal present in it is costly
All of the above
✅ The correct answer is option A.
529. Fusion of bauxite and __________ produces high alumina cement.
Alum
Limestone
Coke
Quartz
✅ The correct answer is option B.
530. Alcohol is produced by the
Oxidation of an aldehyde
Hydrolysis of an ether
Esterification of a fat
None of these
✅ The correct answer is option B.