MCQs 1: Addition of calcium oxide to water produces___________________?
MCQs 2: Pick out the wrong statement ?
Low intensity explosives are also called propellants, whereas high intensity explosive are called detonators
Gun powder comprises of 75% salt petre, 15% charcoal and 10% sulphur
Lead azide is a popular military explosive
TNT is a hygroscopic explosive having very high melting point and is non-toxic to human being
MCQs 3: ____________ process is used for the commercial production of nitric acid by the catalytic oxidation of ammonia ?
MCQs 4: Dense soda ash used in the manufacture of glass, is chemically represented by__________________?
MCQs 5: Which of the following is a detergent ?
MCQs 6: Coagulant is used _________________ filtration?
MCQs 7: In multistage equilibrium conversion of SO2 to SO3 (2SO2 + O2 ⇌ 2SO3), the reverse reaction becomes appreciable at a temperature of 550° C. The percentage equilibrium conversion of SO2 to SO3 can be increased by ?
Increasing the oxygen concentration
Putting more quantity of V2O5 catalyst in the converter
Removing some quantity of SO3 during intermediate stage
Maintaining low temperature & pressure in the converter
MCQs 8: Calgon used in water treatment is chemically ____________________?
MCQs 9: Caprolactam (a raw material for nylon-6 manufacture) is produced from ___________________?
MCQs 10: Pick out the wrong statement ?
Wine, rum & Vodka are prepared by the formulation of fruit juice, sugar beet & rye respectively
Protein catalysts are called enzymes
The rate of chemical reaction is independent of the concentration of reactants at high concentration of enzymes
Total sugar content in molasses is about 10%
MCQs 11: The type of high refractive index glass used in optical instruments is _____________ glass?
MCQs 12: Nitrogen is an essential component of ____________________?
MCQs 13: Fumigant insecticides___________________?
Kill insects, when they eat it
Emit poisonous vapour
Are absorbed throughout the plant
None of these
MCQs 14: Oxidation of ortho-xylene in presence of ______________ catalyst is done to produce phthalic anhydride on commercial scale ?
MCQs 15: Ca(OH)2 is called __________________?
MCQs 16: Helium is produced on commercial scale from__________________?
MCQs 17: RDX (an explosive), which is more sensitive but less toxic than TNT, is chemically____________________?
Cyclo trimethylene trinitramine
Trinitro resorcinol
Cyclo tetramethylene tetranitramine
Trinitrobenzene
MCQs 18: Catalytic oxidation of naphthalene produces_______________?
MCQs 19: Oils are partially hydrogenated (not fully) to manufacture Vanaspati, because fully saturated solidified oils________________?
Cause cholesterol build up and blood clotting
Are prone to rancid oxidation
Always contain some amount of nickel (as their complete removal is very difficult)
Have affinity to retain harmful sulphur compounds
MCQs 20: Which of the following is a bleaching agent added in the detergents to facilitate removal of stains caused due to blood, tea etc ?
MCQs 21: Pick out the wrong statement ?
Fibrillation of fibre during paper manufacture is done to develop the strength in paper
Alkali consumption in digestion/cooking of bamboo is measured in terms of permanganate number
Bagasse fibre contains both lignin & cellulose
Presence of sodium sulphate in pulp makes the pulp bleachability poor
MCQs 22: Pick out the wrong statement ?
Pasteurisation of milk involves moderate heating followed by cooling
Bakeries and breweries make use of yeasts
Enzyme is a complex nitrogenous compound
Oils and fats are alkaloids
MCQs 23: Pick out the wrong statement?
Conversion of SO2 to SO3 in Monsanto-4 pass converter is about 98%
The chemical formula of oleum is H2S2O7, which is formed by saturating sulphuric acid with sulphur trioxide
Vitriol oil is nothing but technical sulphuric acid
Decomposition of sulphuric acid on heating does not start before its boiling
MCQs 24: Catalytic oxidation of naphthalene produces ?
MCQs 25: Oils are partially hydrogenated (not fully) to manufacture Vanaspati , because fully saturated solidified oils ?
Cause cholesterol build up and blood clotting
Are prone to rancid oxidation
Always contain some amount of nickel (as their complete removal is very difficult)
Have affinity to retain harmful sulphur compounds
MCQs 26: Fats as compared to oils have ___________________?
More unsaturated glycerides of fatty acids
Less unsaturated glycerides of fatty acids
Much higher reactivity to oxygen
Lower melting point
MCQs 27: Vinyl chloride (CH2 = CH.Cl) is produced by the thermal pyrolysis of ethylene dichloride at a pressure & temperature of __________________?
MCQs 28: Calcareous & argillaceous materials are used in the manufacture of ___________________?
MCQs 29: Dichloro diphenyl ________________ is the full form of DDT (an insecticide) ?
MCQs 30: Isopropyl benzene produced by alkylation of benzene with propylene is known as _________________?
MCQs 31: Detergent is produced by the sulphonation of dodecyl benzene, which is an ________________ reaction?
MCQs 32: Catalyst used in the manufacture of sulphuric acid by chamber & contact processes are respectively ?
V2O5 & Cr2O3.
Oxides of nitrogen & Cr2O3
V2O5 on a porous carrier & oxides of nitrogen
Oxides of nitrogen & V2O5 on a porous carrier
MCQs 33: High temperature carbonisation of coal produces _____________________ ?
Inferior coke compared to low temperature carbonisation
Less of gases compared to liquid products
Larger quantity of tar compared to low temperature carbonisation
None of these
MCQs 34: Which of the following is used as a coagulant in water treatment ?
MCQs 35: Vegetable oils contain large quantity of glycerides of unsaturated acids. When the vegetable oils contain high amount of saturated fatty acids, it is termed as ____________________ oil?
MCQs 36: Which of the following has sodium bicarbonate as its main constituent ?
MCQs 37: Fermentation of molasses to produce ethyl alcohol is done at ________________ °C?
MCQs 38: Which of the following is a co-product during the manufacture of caustic soda by electrolysis of brine ?
MCQs 39: Nylon-66 is manufactured from____________________?
Hexamethylene diamine and adipic acid
Hexamethylene diamine and Maleic anhydride
Caprolactam
Dimethyl terephthalate and ethylene glycol
MCQs 40: Anion exchanger is regenerated usually with ____________________?
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