Silicone is a/an ___________________?
(A) Thermoplastic
(B) Inorganic polymer
(C) Monomer
(D) None of these
Liquor poisoning generally occurs due to the presence of _________________ in it ?
(A) Ethyl alcohol
(B) Impurities
(C) Methyl alcohol
(D) Carbonic acid
The process involved in converting rubber into a thin sheet or coating it on fabric is called ___________________?
(A) Extrusion
(B) Mastication
(C) Calendaring
(D) Vulcanisation
Sulphur removal by heating of pyrite ore in presence of air is called its ____________________?
(A) Reduction
(B) Roasting
(C) Calcination
(D) Smelting
Alcohol content in freshly prepared natural and fortified wine may be respectively around ______________ percent ?
(A) 7-14 and 14-30
(B) 7-14 and 40-50
(C) 14 – 30 and 40-50
(D) 10 – 20 and 40 – 50
Saponification number of an oil or fat____________________?
(A) Gives an idea about its molecular weight
(B) Is inversely proportional to its molecular weight
(C) Detects its adulteration
(D) All A ,
Pick out the false statement pertaining to water treatment ?
(A) Aeration of water is effective in CO2 removal
(B) The zeolite water softening process reduces the hardness of water by not more than 50%
(C) Sodium sulphate or sodium carbonate do not cause hardness in water
(D) Water with pH value less than 7, is acidic
Argon is the third largest constituent of air (followed by N2 & O2). Its percentage by volume in air is___________________?
(A) 0.14
(B) 0.34
(C) 0.94
(D) 1.4
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 decolorized during its manufacture by adding antimony oxide, manganese 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
Thermal pyrolysis of ethylene dichloride produces___________________?
(A) Trichloroethylene
(B) Vinyl chloride
(C) Ethanol amine
(D) Ethylene oxide