The document contains an unsolved chemistry practice test with multiple choice, integer, paragraph and matrix type questions. It covers topics like nitration reactions, Hund's rule, packing efficiency in unit cells, complex ions, acid-base reactions, geometric isomers, electronic configurations, hydrogen atom energy levels, and reaction types including substitution, addition, redox and polymerization. The test aims to assess understanding of fundamental chemistry concepts and analyze different reaction mechanisms.

1. IITJEE–Past papersCHEMISTRY- UNSOLVED PAPER - 2010

2. SECTION – ISingle Correct Choice TypeThis Section contains 6 multiple choice questions. Each question has four choices A), B), C) and D) out of which ONLY ONE is correct.

3. 01ProblemThe compounds P, Q and Swere separately subjected to nitration using HNO3/H2SO4 mixture. The major product formed in each case respectively, isa.b.c.d.

4. Problem02Assuming that Hund’s rule is violated, the bond order and magnetic nature of the diatomic molecule B2 is1 and diamagnetic 0 and diamagnetic1 and paramagnetic 0 and paramagnetic

5. Problem03The packing efficiency of the two-dimensional square unit cell shown below is 39.27% 68.02%74.05% 78.54%

6. Problem04The complex showing a spin-only magnetic moment of 2.82 B.M. INi

7. Problem05In the reaction the structure of theProduct T isa.b.c.d.

8. Problem06The species having pyramidal shape is

9. SECTION – IIInteger TypeThis Section contains 5 questions. The answer to each question is a single-digit integer, ranging from 0 to 9. The correct digit below the question no. in the ORS is to be bubbled.

10. Problem07Silver (atomic weight = 108 g ) has a density of 10.5 g . The number of silver atoms on a surface of area 10−12 can be expressed in scientific notation as y × 10x. The value of x is

11. Problem08Among the following , the number of elements showing only one non-zero oxidation state is O, Cl, F, N, P, Sn, Tl, Na, Ti

12. Problem09One mole of an ideal gas is taken from a to b along two paths denoted by the solid and the dashed lines as shown in the graph below. If the work done along the solid line path is and that along the dotted line path is wd, then the integer closest to the ratio is

13. Problem10The total number of dirpotic acids among the following is

14. Problem11Total number of geometrical isomers for the complex is

15. SECTION – IIIParagraph TypeThis Section contains 2 paragraphs. Based upon each of the paragraphs 3 multiple choice questions have to be answered. Each of these questions has four choices (A), (B), (C) and (D) out of which ONLY ONE is correct

16. Problem12The compounds P and Q respectively area.b.c.d.

17. Problem13The compound R isa.b.c.d.

18. Problem14The compound S isa.b.c.d.

19. Problem15The state is1s 2s2p 3

20. Problem16Energy of the state S1 in units of the hydrogen atom ground state energy is0.751.502.25 4.50

21. Problem17The orbital angular momentum quantum number of the state S2 is0 1 2 3

22. SECTION – IVMatrix Type This Section contains 2 questions. Each question has four statements (A, B, C and D) given in Column I and five statements (p, q, r, s and t) in Column II. Any given statement in Column I can have correct matching with one or more statement(s) given in Column II. For example, if for a given question, statement B matches with the statements given in q and r, then for that particular question, against statement B, darken the bubbles corresponding to q and r in the ORS.

23. Problem18Match the reactions in Column I with appropriate options in Column II.Column I Column II a. p) Racemic mixtureb. q) Addition reaction c. r) Substitution reaction d. s) Coupling reaction t) Carbocation intermediate

24. Problem19All the compounds listed in Column I react with water. Match the result of the respective reactions with the appropriate options listed in Column II.Column I Column II p) Hydrogen halide formation q) Redox reaction r) Reacts with glass s) Polymerization t) O2 formation

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