PPSC Chemistry Full Book Test With Answers

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PPSC Chemistry Full Book Test

Sr. # Questions Answers Choice
1 Proper proportioning of concrete, ensures Resistance to water Desired durability Water tightens of the structure. All
2 To obtain cement dry powder, lime stones and shales or their slurry, is burnt in a rotary kiln at a temeperature between 1100 <sup>o</sup> and 1200 <sup>o</sup>C 1200 <sup>o</sup> and 1300 <sup>o</sup>C 1400 <sup>o</sup> and 1500 <sup>o</sup>C 1900<sup>o</sup> and 2000 <sup>o</sup>C
3 While compacting the concrete by a mechanical vibrator, the slump should not exceed. 2.5 cm 10 cm 3.1 cm 5.0 cm
4 Which of the following is raw material not present on the cement. Lime stone Gypsum Red lead Blast furnace slag
5 For quality control of Portland cement, the test essentially done is. Setting time Soundness Tensile strength All
6 Which of the following is NOT true 7 ceramic materials are. Hard, have high densities high compressive strength and very good thermal resistance and strength at higher temperature Silicon Hard, have low densities high compressive strength and very good thermal resistance and strength at higher temperature. Hard, have low densities low compressive strength and very good thermal resistance and strength at higher temperature. Hard, have low densities' high compressive strength and very good thermal resistance and strength at higher temperature.
7 The different types of glass are. A- glass, C-Glass, E-Glass and S-Glass A-Glass, B-Glass, E-Glass, S-Glass AR -Glass, C-Glass, E-Glass and S -Glass A-B Glass
8 Rotary spinning process is used to produce Glass wool Optical fibre Glass marble None of above
9 The main constituent of glass is. Silica Silicon Magnesia Alumina
10 Which of the following glass transmits the maximum light. Serrated glass Clear glass Milk glass Opalescent glass
11 Glass industry requires soda ash with Solids density 1.91 and bulk density 1.0 Solids density 1.86 and bulk density 0.6 Solid density 1.80 and bulk density 0.58 All of above
12 Cement containing higher percentage of gypsum than required. Sets slowly Sets repidly <sub>Does not set at all</sub> Has no effect
13 The composition of mixture of clay and lime stone in the raw for cement material is. 75% lime stone and 25% clay 25% lime stone and 75% clay 15% lime stone and 55% clay 30% limes stone and 79% clay
14 What is clinker. Roasted calcareous material Roasted argillaceous material Roasted calcareous and argillaceous material Roasted gypsum
15 Cement is a mixture of Clay and clinker Clay limestone and gypsum Limestone and gypsum Binder
16 Commercial detergents contain mainly ___________ RCOON RONa RSNa All above
17 Washing soap can be prepared by saponification with alkali of _____ of the following oil. Rose oil Paraffin oil Groundnut oil Coconut oil
18 Fats and oil are_____________ Acids Alcohols Salts Base
19 ___________ surfactants perform well over a wide range of water hardness and pH. Anionic Cationic Nonionic Neutral
20 Turpentine is obtained from._______________ Oak tree Pine tree Birch tree Lemon tree
21 Hydrolytic reaction of fat with caustic soda is known as ______ Esterification Saponification Acetylation Carboxylation
22 ________is best in its cleaning action. Soap Detergents Surfactant None of these
23 The soap and detergent are source of organic pollutants like. Glycerol Polyphosphates Sulphonated hydrocarbons All of these
24 What is caustic potash NaOH KOH NaCl KCl
25 Each fat or oil in made up of A distinctive mixture of several different triglycorides A distinctive mixture of several aldehydes Mixture of above both None of above
26 Soapy detergents and soapless detergents behave differently in hard water because they Have different hydrophilic heads Have different hydrophobic hydrocarbon chains Have different pH values Above A and C both
27 What is use of the addition of brine solution in the production of soap from castor oil and sodium hydroxide. To speed up the reaction To lower the solubility of soap To remove unreacted castor oil and sodium hydroxide To increase the purity of the soap obtained.
28 in the process of production of soap the soap can be salted out by adding Concentrated sulphuric acid Concentrated potassium hydroxide solution Concentrated sodium chloride solution None of above
29 The alkaline hydrolysis of fat is know as Condensation Esterification Saponification Emulsification
30 Which type of organic compounds does fat belong to. Alkene Ester Alkanol Alkanoic acid
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