A. High electrical insulation properties
B. Sharp melting points
C. Low co-efficient of thermal expansion
D. Compressive strength much greater than their tensile strengths
Related Mcqs:
- Pick out the wrong statement pertaining to the soap manufacture?
A. Transparent soaps are made by cold process
B. Organic pigments are used as colouring materials in the soap manufacture
C. Both laundry as well as toilet soaps are manufactured by hot process
D. Colourless rosin is used in the manufacture of laundry soaps - Pick out the wrong statement pertaining to nitric acid ?
A. About 90% of nitric acid is manufactured by Ostwald’s process
B. It is a strong mono basic acid which reacts with almost all the metals except noble metals
C. Yellow color of impure nitric acid is because of dissolved oxides of nitrogen (mainly NO2)
D. Arc process of nitric acid manufacture is economical as compared to Ostwald’s process - Pick out the wrong statement pertaining to solvent extraction of oil. Rate of extraction__________________?
A. Decreases with decrease of thickness of the flakes
B. Increases with the increasing flake size keeping the flake thickness constant
C. Increases considerably with the rise of temperature
D. Decreases as the moisture content of flakes increases - 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 - Pick out the true statement pertaining to water treatment ?
A. Slow sand filters can remove colour completely
B. Activated carbon can be used for taste & odour control without subsequent filtration
C. Application of activated carbon reduces the temporary hardness of water
D. Normally, the turbidity is removed by adding a coagulant prior to sedimentation - Pick out the wrong statement?
A. Azoic dyes are mostly applied on cotton fabrics
B. Basic dyes (e.g. amino derivatives) are applied mostly to paper
C. Mordant dyes are applied mainly to wools
D. None of these - Pick out the wrong statement ?
A. Chamber process of sulphuric acid manufacture produces pure acid of concentration < 80%
B. Contact process of sulphuric acid manufacture produces pure acid of concentration ≥ 98%
C. 75% oleum can be produced by distillation of 20% oleum
D. Contact process of sulphuric acid manufacture uses nickel as the catalyst - Pick out the wrong statement ?
A. Strongly caking coal should not be used in the Lurgi gasifier
B. Acetylene gas cannot be used for illumination purpose
C. Water gas is called blue gas because of the color of the flame, when it is burnt
D. Gaseous fuels require less percentage of excess air for combustion as compared to liquid fuels - 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 - Pick out the wrong statement ?
A. Pasteurisation of milk involves moderate heating followed by cooling
B. Bakeries and breweries make use of yeasts
C. Enzyme is a complex nitrogenous compound
D. Oils and fats are alkaloids
