Chemical Engineering Objective Questions { Chemical Process }

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85. Ca(OH)₂ is called

86. Flux addition during smelting of ore is done to

A. Remove impurities/gangue

B. Enhance rate of reaction

C. Accelerate reduction of ore

D. Separate slag from metal

87. Nylon 66 is so named because the

A. Average degree of polymerisation of the polymer is 1966

B. Number of carbon atoms between two nitrogen atoms are 6

C. Number of nitrogen atoms between two carbon atoms are 6

D. Polymer was first synthesised in 1966

88. Pick out the wrong statement.

A. Hard glass which is used for making laboratory glass wares is a mixture of sodium borosilicate and aluminium borosilicate

B. Glass is decolorised during its manufac-ture by adding antimony oxide, mangnese dioxide or arsenic oxide

C. Ordinary glass is represented chemically by Na₂O.CaO.6SiO₂

D. Red color is imparted to glass by addition of arsenic oxide

89. Glass is

B. Subjected to galvanising

C. A super cooled liquid

D. All of the above

90. Nylon 6-6 is manufactured from

A. Hexamethylene diamine and adipic acid

B. Hexamethylene diamine and maleic anhydride

D. Dimethyl terephthalate and ethylene glycol

91. Which catalyst is used in the manufacture of ethylene oxide by oxidation of ethylene?

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