PPSC Chemistry Full Book Test With Answers

PPSC Chemistry Full Book Test

Sr. # Questions Answers Choice
1 Which of the following is the major process when neopentyl bromide is dehydrogenate with alcoholic potash. 2- methyl -1- butene 2- methyl- 1- butene 2,3 -dimethyl butene 2- butene
2 1-Chlorobutane on reaction with alcohols potash gives. 1- butane 1-butanol 2- butane 2- butanol
3 The product obtained on heating n-heptane with Cr2O3 ____Al2O3 at 600 oC is. Cycloheptane Methyl cyclohexane Benzene Teluene
4 Bromination of n-butane produces. I-bromobutane as the major product 2- bromobutane as the major product Both I - bromo and 2- bromobutane with equal percentage Both i-bromo and 2-bromo products whose percentage depends upon temperature.
5 Each of the following compound react with Grignard's reagent to form alkane exxcept. Ethanal Ethanoic acid Ethanol Ethync
6 In the reaction RCO2Na + Na OH (CaO) ______ RH, we eliminate carboxylate group as. CO2 Na2CO3 -CO CaCO3
7 During the preparation of ethane by Kolbe's electrolytic method using inert electrodes the pH of the electrolyte. Increases progressively as the reaction proceeds Decreases progressively as the reaction proceeds Remains constant throughout the reaction May decrease if the concentration of the electrolyte is not very high
8 Which of the following hydrocarbon cannot be obtained on reacting chloomethane with sodium metal in the presence of dry ether. C4 H10 C2H6 C2H4 C3H8
9 A mixture of ethyl iodide and n-propyl iodide is subjected to Wurts reaction. The hydrocarbon that will nto be formed is n-butane n-propane n-pentane n-hexane
10 The IUPAC name of HCOOCH3 is. Methoxy methanol Ethanoic acid Methyl methanoate Methoxy methane
11 The IUPAC name of HOCCH2CH2CH2COOH is 4- formylbutanoic acid 5- formylpentanoic acid 4- carboxybutanal 5- carboxypentanal
12 The IUPAC name of C2(CN)3 is 2,3-dicvano butanedinitrile 2,3 -dicyano -2- butenedinitrile 1,1,2,2-tetrcyanoethane 1,1,2,2, tetracyanocthenc
13 IUPAC name of HCONH2 is. Methanamide Methanoylamine Ammoethanal Formanide
14 The IUPAC name of C2H3, CO , OC OC2H5 in Prepanoic anhydride Ethanoic anhydride Diketoethoxy ether None of the above
15 The compound (CH3)3COH according to IUPAC is known as. Tert Butanol 2,2 -Dumethyl -Propanol 2- Methyl -2-propanol Tert Alcohol
16 The IUPAC name of ethylene oxide is. Epoxy methane Oxcethene Methoxymethane All of the above
17 The IUPAC suffix used for ______ NC group is Cyanide Isocyanides Carbylamines Nitrite
18 When FeSO4 is added in the sodium extract the compound formed is. Only Na4[Fe (CN)6] Only Fe (OH)2 Only Na2So4 Mixture of all these
19 Presence of nitrogen in organic compound to tested as. Nitrogen gas NH3 NO Amide
20 Essential oils are purified by which of the following methods. Steam distillation Sublimation Crystallization Fractional crystallization
21 The most suitable method of separation in mixture of o-and p- nitrophenol is. Steam distillation Chromatography Ion-exchange Sublimation
22 Beillstein test is used for. Cl N2 CO2 Na
23 The simplest formula of a compound containing 50% of element X XY2 XY X2Y None of the abvoe
24 The molar mass of an organic acids is determined by Depression of freezing point Elevation of boiling point Volumetric method Victor Myer's method
25 Phosphorus is detected by fusing the organic compound with -------followed by extraction with H2O HNO3 H2SO4 Sodium per oxide Ozone
26 Carbon and Hydrogen are estimated by Liebig's method Kjeldhal's method Carries method None of the above
27 In Dumas method, the volume of the gas collected is equivalent to which of the following gases set free from the compound. Ammonia O2 N2 NO
28 The stationary and mobile phases in paper chromatography are. <sup>Liquid/Liquid</sup> Solid /Liquid Liquid/Solid Gas/solid
29 Two solids A and B have appreciable different solubility in water but their m.p. are very close. The mixture A and B can be separated by. Sublimation Distillation Fractional crystallization Specific rotation
30 The function of boiling the sodium extract with conc. HNO3 before testing the halogens is To make solution clear To make the solution acidic To bring common ion effect To destroy CN- and S2- ion
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