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1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q21 ⇒ Chemical name of aspirin (an analgesic drug) is acetylsalicylic acid [other wrong options] [Discuss in forum] nictonic acid calcium acetate methyl salicylate |
Q22 ⇒ Molasses is the starting material for the production of alcohol [other wrong options] [Discuss in forum] essential oil fatty acids massecuite |
Q23 ⇒ Bakelite is chemically known as phenol formaldehyde [other wrong options] [Discuss in forum] polyvinyl chloride (PVC) polybutadiene polyurathane |
Q24 ⇒ Detergent is produced by the sulphonation of dodecyl benzene, which is an __________ reaction. both (b) and (c) [other wrong options] [Discuss in forum] endothermic exothermic irreversible |
Q25 ⇒ Anion exchanger is regenerated usually with NaOH [other wrong options] [Discuss in forum] H2SO4 hydrazine alum solution |
Q26 ⇒ Fluorescent dyes are added in detergents to act as fabric brightener (by converting ultraviolet light to visible light) thereby improving the whiteness appearance of white fabrics. [other wrong options] [Discuss in forum] attain distinctiveness from other brands. act as tarnish inhibitor for metals like German silver. none of these |
Q27 ⇒ During the manufacture of sulphuric acid, the temperature of molten sulphur is not increased beyond 160°C, as its viscosity is not reduced on further heating (hence pressure drop on pumping it, cannot be further reduced). [other wrong options] [Discuss in forum] it is very corrosive at elevated temperature. it decomposes on further increasing the temperature. none of these. |
Q28 ⇒ Consider the production of ammonia from methene and air as raw materials. The catalyst used are: (i) __________ for steam reforming of methane and (ii) __________ for ammonia synthesis. i - Ni/Al2O3; ii - Fe/Al2O3 [other wrong options] [Discuss in forum] i - Ni/Al2O3; ii - Cu - ZnO/Al2O3 i - Fe/Al2O3; ii - Cu - ZnO/Al2O3 i - Fe/Al2O3; ii - Ni/Al2O3 |
Q29 ⇒ Hydrazine is largely used as rocket fuel. [other wrong options] [Discuss in forum] as a starting material for 'hypo'. in photographic industry. in printing industry. |
Q30 ⇒ Pick out the wrong statement. Red color is imparted to glass by addition of arsenic oxide. [other wrong options] [Discuss in forum] Hard glass which is used for making laboratory glass wares is a mixture of sodium borosilicate and aluminium borosilicate. Glass is decolorised during its manufac-ture by adding antimony oxide, mangnese dioxide or arsenic oxide. Ordinary glass is represented chemically by Na2O . CaO . 6SiO2. |
Q31 ⇒ Margarine is a/an fat [other wrong options] [Discuss in forum] explosive plasticiser rocket propellant |
Q32 ⇒ __________ is an ore concentrating metallurgical process involving a chemical change. Roasting [other wrong options] [Discuss in forum] Electromagnetic separation Froth floatation none of these |
Q33 ⇒ Which of the following is used as a binding material in soap to improve soap texture ? Borax [other wrong options] [Discuss in forum] Rosin Benzyl acetate Sodium carbonate |
Q34 ⇒ Flexible foam (for mattresses) is usually made of polyurethanes [other wrong options] [Discuss in forum] PVC silicone polyamides |
Q35 ⇒ Which of the following is the main constituent of the mother liquor produced in salt industry ? Bromine [other wrong options] [Discuss in forum] Quick lime Glauber's salt Salt petre |
Q36 ⇒ Lubricating greases are a mixture of mineral oil, soap and additives. [other wrong options] [Discuss in forum] mineral oil and metallic soap. mineral oil and fatty oil. fatty oil and metallic soap. |
Q37 ⇒ Triple superphosphate is manufactured by reacting phosphate rock with phosphoric acid. [other wrong options] [Discuss in forum] phosphate rock with sulphuric acid. phosphate rock with nitric acid. ammonium phosphate with phosphoric acid. |
Q38 ⇒ Phthalic anhydride is used as plasticisers [other wrong options] [Discuss in forum] in making PVC in insecticides manufacture for making nylon-6 |
Q39 ⇒ Dry ice (solidified CO2) is used for the storage & shipment of frozen foods and ice-creams. [other wrong options] [Discuss in forum] liquefaction of permanent gases. liquefaction of natural gas. none of these. |
Q40 ⇒ The yield of tar from high temperature carbonisation of dry coal is about __________ percent. 3 [other wrong options] [Discuss in forum] 12 22 0.3 |
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