AFMC Chemistry -1995

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AFMC–Past papers: 

AFMC–Past papers CHEMISTRY - UNSOLVED PAPER - 1995

SECTION – I (Total Marks :50): 

SECTION – I (Total Marks :50) Single Correct Answer Type There are five parts in this question. Four choices are given for each part and one of them is correct. Indicate you choice of the correct answer for each part in your answer-book by writing the letter (a), (b), (c) or (d) whichever is appropriate

Problem: 

01 Optical activity is measured by Spectrograph Polari meter Tracer technique Refract meter Problem

Problem: 

Problem 02 Pyruvic acid is obtained by Oxidation of formaldehyde cyanohydrins Oxidation of acetaldehyde cyanohydrins Oxidation of benzaldehyde cyanohydrins Oxidation of acetone cyanohydrins

Problem: 

Problem 03 XeF 4 on partial hydrolysis produces XeOF 4 XeF 2 XeO 3 XeOF 2

Problem: 

Problem 04 Osmotic pressure can be measured by Solvay method Ostwald method Haber’s method Berkley and hartley’s method

Problem: 

Problem 05 A catalyst only Comes to equilibrium Decreases activation energy Increases activation energy All of these

Problem: 

Problem 06 Calcinations is used in metallurgy to remove CO 2 and H 2 S H 2 O and SiO 2 H 2 O and H 2 S H 2 o and CO 2

Problem: 

Problem 07 If pH of A, B, C and D are 9.5, 2.5, 3.5 and 5.5 respectively, then strongest acid is D A B C

Problem: 

Problem 08 The number of electrons in the nucleus of C 12 is’ 0 3 6 12

Problem: 

Problem 09 In hydrolysis of aniline, the reagent used is CH 3 OH Dil.HC1 C 2 H 5 OH NaOH

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Problem 10 The isomerism exhibits by nitroalkane and isonitroalkane is Tautomerism Functional Metamerism Positional

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Problem 11 Cyanohydrins of which of the following forms lactic acid? CH 3 CHO HCHO CH 3 CH 2 CHO CH 3 COCH 3

Problem: 

Problem 12 The structure of benzene is Tetrahedral Planar Trigonal bipyramidal Linear

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Problem 13 Glycerol reacts with KHSO 4 to form Aldehyde Acyl alcohol Acetone Acrolein

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Problem 14 Beilstein test is used for the detectin of Na N 2 CO 2 C1

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Problem 15 The nature of A1C1 3 is Covalent and basic Anhydrous and covalent Co0ordinate and cidic Anhydrous and ionic

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Problem 16 Nitrous oxide (N 2 O) is soluble in cold water Acidic in nature Odorless Soluble in hot water

Problem: 

Problem 17 The formula of Freon is CCIF 3 CC1 2 F 2 CH 2 F 2 CFC1 3

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Problem 18 In electrolysis of aqueous sulphuric acid, the gas at anode and cathode is H 2 and O 2 O 2 and H 2 SO 3 and O 2 SO 2 and H 2

Problem: 

Problem 19 Which of the following has a higher rate of reaction with water? Na Li Rb K

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Problem 20 Which of the following undergoes sublimation? AgC1 ZnC1 2 NH 4 C1 CuC1 2

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Problem 21 The rate of reaction depends upon the Pressure Volume Concentration of reactant Force

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Problem 22 The most common lanthanide is Samarium Lanthanum Plutonium Cerium

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Problem 23 Which oxide of manganese is aspheric? Mn 2 O 7 MnO 2 MnO Mn 2 O 3

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Problem 24 Which of the following does not give a borax bead test? Sodium Chromium Cobalt Ferrous salt

Problem: 

Problem 25 The isotopes of elements was discovered by Thomson Soddy Chadwick Curie

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Problem 26 If α- particles are bombarded, in gold foil, then Maximum α- particles are deflected Most α- particles are unelected All α- particles return to original path Half α- particles are deflected

Problem: 

Problem 27 In NH 3 and PH 3 , the common feature is Basic nature Odor Acidic nature Combustibility

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Problem 28 In which of the following the NH 3 is not used? Manufacture of rayon and plastic Cold storage For preparing fertilizers Anesthetic

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Problem 29 Which of the following conducts electricity? Br 2 Fused Nac1 Si CO 2

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Problem 30 Which of the following behaves as both oxidizing and reducing agents? H 2 S H 2 SO 4 HNO 3 SO 2

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Problem 31 Bromine water reacts with SO2 to form HBr and S H 2 O and HBr S and H 2 O H 2 SO 4 + HBr

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Problem 32 If the supply of oxygen is limited, H2S reacts with O2 to form H 2 O +SO 3 H 2 O+ S H 2 SO 4 +S H 2 0+ SO 2

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Problem 33 Which of the following is not linear? CO 2 H 2 O HF HC1

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Problem 34 Last molecule of H 2 O is evolved from H 2 O 2 by Electrolysis Crystallization Condensation Evaporation

Problem: 

Problem 35 Which of the following phosphorus is most reactive? Scarlet phosphorus Red phosphorus Violet phosphorus While phosphorus

Problem: 

Problem 36 Fusion mixture is K 2 CO 3 +NaHSO 4 K 2 CO 3 +Na 2 CO 3 KHSO 4 +Na 2 SO 3 KHSO 4 +NaHSO 4

Problem: 

Problem 37 The structure of PF 5 molecule is Trifocal bipyramidal Tetrahedral Pentagonal bipyramidal Square planar

Problem: 

Problem 38 The solubility of I 2 increases in water in the presence of KMnO 4 KI C 2 S H 2 SO 4

Problem: 

Problem 39 Cl 2 reacts with CS 2 in presence of A1C1 3 to form C 2 H 5 C1 CHC1 3 C 2 H 6 CC1 4

Problem: 

Problem 40 In electrolytic refining of copper, some gold is deposited at Cathode Anode mud Electrolyte Cathode mud

Problem: 

Problem 41 The hydride ion(H) is is electronic with He H Be He +

Problem: 

Problem 42 The process of electrolysis is used in Electrophoresis Electroplating Electro refining Both (B) and (C)

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Problem 43 The precipitation occurs if ionic product is Equal to solubility product Less than solubility product More than solubility product Either (a) or (b)

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Problem 44 In formation of a molecule by an atom Repulsive forces operate Attractive forces operate Electromotive forces operate Both attractive and repulsive forces operate

Problem: 

Problem 45 Fog is an example of Liquid dispersed in solid Solid dispersed in gas Solid dispersed in liquid Liquid dispersed in gas

Problem: 

Problem 46 The isotonic solutions have the same Molar concentration Normality Molarity Molality

Problem: 

Problem 47 Splitting of spectral line under the influence of magnetic field is called Photoelectric effect Stark effect Magnetic effect Zeeman’s effect

Problem: 

Problem 48 In which of the following reaction K p > K c ? PC1 3 +C1 2 PC1 5 N 2 +3H 2 2NH 3 2SO3 O 2 +2SO 3 H 2 +I 2 2HI

Problem: 

Problem 49 Arrange the following in increasing order of their atomic radius: Na, K, Mg, Rb Mg<Na< Rb <K Mg<K<Na< Rb Na<K< Rb <Mg Mg<Na<K< Rb

Problem: 

Problem 50 The most electron affinity element is Br F I C1

Slide 53: 

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