This document contains a 30 question chemistry practice exam with multiple choice questions covering topics like covalent bonding, organic reactions, thermodynamics, acid-base chemistry, and crystal structures. The questions require understanding of concepts like hybridization, oxidation states, phase changes of matter, and properties of common functional groups and compounds.

1. AEEE –Past papers CHEMISTRY - UNSOLVED PAPER - 2011

2. SECTION – I Straight Objective Type This section contains multiple choice questions numbered 30 . Each question has 4 choices (A), (B), (C) and (D), out of which ONLY ONE is correct.

3. 01 Problem Among the following the maximum covalent character is shown by the compound : SnCl2 AlCl3 MgCl2 FeCl2

4. Problem 02 The presence or absence of hydroxyl group on which carbon atom of sugar differentiates RNA and DNA ? 2nd 3rd 4th 1st

5. Problem 03 Trichloroacetaldehyde was subjected to Cannizzaro’s reaction by using NaOH. The mixture of the products contains sodium trichloroacetate and another compound. The other compound is : Trichloromethanol 2, 2, 2-Trichloropropanol Chloroform 2, 2, 2-Trichloroethanol

6. Problem 04 Sodium ethoxide has reacted with ethanoyl chloride. The compound that is produced in the above reaction is : 2-Butanone Ethyl chloride Ethyl ethanoate Diethyl ether

7. Problem 05 The reduction potential of hydrogen half cell will be negative if : p(H2 ) = 1 atm and [H+ ] =1.0 M p ( H 2 ) =2 atm and [H+ ] =1.0 M p ( H 2 ) = 2 atm and[H+ ] = 2.0 M p ( H 2) =1 atm and [H+ ] = 2.0 M

8. Problem 06 The strongest acid amongst the following compounds is : HCOOH CH 3 CH 2 CH 2 (Cl ) CO H ClCH2 CH 2 CH 2 COOH CH 3 COOH

9. Problem 07 The degree of dissociation (α) of a weak electrolyte, A x B y is related to van’t Hoff factor (i) by the expression : a. b. c. d.

10. Problem 08 `a’ and `b’ are van der Waals’ constants for gases. Chlorine is more easily liquefied than ethane because a and b for Cl2 < a and b for C 2 H 6 a for Cl2 < a for C 2 H 6 but b for Cl2 > b for C 2 H 6 a for Cl2 > a for C 2 H 6 but b for Cl2 < b for C 2 H 6 a and b for Cl2 > a and b for C2H 6

11. Problem 09 A vessel at 1000 K contains 2 CO with a pressure of 0.5 atm. Some of the 2 CO is converted into CO on the addition of graphite. If the total pressure at equilibrium is 0.8 atm, the value of K is 3 atm 0.3 atm 0.18 atm 1.8 atm

12. Problem 10 Boron cannot form which one of the following anions ? BH−4 B OH −4 BO−2 BF 3 −6

13. Problem 11 Which of the following facts about the complex [Cr ( NH3 ) 6 ]Cl3 s wrong ? The complex is paramagnetic The complex is an outer orbital complex The complex gives white precipitate with silver nitrate solution The complex involves d2sp3 hybridization and is octahedral in shape.

14. Problem 12 Ethylene glycol is used as an antifreeze in a cold climate. Mass of ethylene glycol which should be added to 4 kg of water to prevent it from freezing at −6oC will be : [K f for water = 1.86 K kg mol −1 , and molar mass of ethylene glycol = 62g mol −1 ) 204.30g 400.00 g 304.60 g 804.32g

15. Problem 13 Which one of the following order represents the correct sequence of the increasing basic nature of the given oxides ? MgO < K 2 O < Al 2 O 3 < Na 2 O Na 2 O < K 2 O < MgO < Al 2 O 3 K 2 O < Na 2 O < Al 2 O 3 < MgO Al 2 O 3 < MgO < Na 2 O < K O 2

16. Problem 14 The rate of a chemical reaction doubles for every 10oC rise of temperature. If the temperature is raised by 50oC, the rate of the reaction increases by about : 24 times 32 times 64 times 10 times

17. Problem 15 The magnetic moment (spin only) of [ Ni 2Cl4 ] − is 5.46 BM 2.83 BM 1.41 BM 1.82 BM

18. Problem 16 The hybridization of orbitals of N atom in NO−3,NO+2 and 4 NH+ are respectively : sp2, sp, sp3 sp, sp3, sp2 sp2, sp3, sp sp, sp2, sp3

19. Problem 17 In context of the lanthanoids, which of the following statements is not correct ? All the members exhibit +3 oxidation state Because of similar properties the separation of lanthanoids is not easy. Availability of 4f electrons results in the formation of compounds in +4 state for all the members of the series. There is a gradual decrease in the radii of the members with increasing atomic number in the series.

20. Problem 18 A 5.2 molal aqueous solution of methyl alcohol, CH 3 OH , is supplied. What is the mole fraction of methyl alcohol in the solution ? 0.190 0.086 0.050 0.100

21. Problem 19 Which of the following statement is wrong ? Nitrogen cannot form dπ - pπ bond. Single N- N bond is weaker than the single P – P bond, N 2 O 4 has two resonance structures The stability of hydrides increases from NH 3 to BiH3 in group 15 of the periodic table

22. Problem 20 The outer electron configuration of Gd (Atomic No : 64 is : 4f8 5d0 6s2 4f 4 5d4 6s2 4f7 5d1 6s2 4f3 4d5 6s2

23. Problem 21 Which of the following statements regarding sulphur is incorrect ? The vapour at 200oC consists mostly of 8 S rings At 600oC the gas mainly consists of 2 S molecules The oxidation state of sulphur is never less than +4 in its compounds 2 S molecule is paramagnetic.

24. Problem 22 The structure of IF 7 is : trigonalbipyramid octahedral pentagonal bipyramid square pyramid

25. Problem 23 Ozonolysis of an organic compound gives formaldehyde as one of the products. This confirms the presence of : a vinyl group an isopropyl group an acetylenic triple bond two ethylenic double bonds

26. Problem 24 A gas absorbs a photon of 355 nm and emits at two wavelengths. If one of the emissions is at 680 nm, the other is at : 325 nm 743 nm 518 nm 1035 nm

27. Problem 25 Silver Mirror test is given by which one of the following compounds ? Acetone Formaldehyde Benzophenone Acetaldehyde

28. Problem 26 Which of the following reagents may be used to distinguish between phenol and benzoic acid ? Tollen’s reagent Molisch reagent Neutral Fe Cl3 Aqueous NaOH

29. Problem 27 Phenol is heated with a solution of mixture of KBr and KBrO3. The major product obtained in the above reaction is 3-Bromophenol 4-Bromophenol 2, 4, 6- Tribromophenol 2-Bromophenol

30. Problem 28 In a face centred cubic lattice, atom A occupies the corner positions and atom B occupies the face centre positions. If one atom of B is missing from one of the face centred points, the formula of the compound is AB 2 A 2 B 3 A 2 B 5 A B 2

31. Problem 29 The entropy change involved in the isothermal reversible expansion of 2 moles of an ideal gas from a volume of 10 dm3 to a volume of 100 dm3 at 27oC is : 35.8J mol −1K−1 32.3J mol−1K−1 42.3J mol−1K−1 38.3J mol−1K−1

32. Problem 30 Identify the compound that exhibits tautomerism. Lactic acid 2-Pentanone Phenol 2- Butene

33. FOR SOLUTION VISIT WWW.VASISTA.NET