This document contains a 50 question chemistry exam from 2003 on various topics including: - Hybridization of carbon atoms in benzene - Compounds that give acetone on ozonolysis - Distinguishing p-chloroaniline and anilinium hydrogen chloride - The role of aluminium in alumino thermic processes The questions cover a wide range of chemistry topics testing knowledge of reactions, compounds, electronic configurations, bond energies, states of matter, acid-base properties, and thermodynamics. The exam is in a multiple choice format with one correct answer out of four choices for each question.

1. UPSEE–PAST PAPER
CHEMISTRY- UNSOLVED PAPER - 2003

2. 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

3. 01 Problem
The hybridization of carbon atom in benzene is :
a. sp
b. sp2
c. sp3
d. dsp2

4. 02 Problem
Compound which gives acetone on ozonolysis :
a. CH3 – CH = CH – CH3
b. (CH3)2C = C (CH3)2
c. C6H5CH = CH2
d. CH3CH= CH2

5. 03 Problem
p-chloro aniline and anilinium hydrogen chloride can be distinguished by :
a. Sandmeyer reaction
b. Carbyl amine reaction
c. Hinberg’s reaction
d. AgNO3

6. 04 Problem
In alumino thermic process, aluminium acts as :
a. Oxidant
b. Flux
c. A readucing agent
d. A solder

7. 05 Problem
Mn2+ can be converted into Mn7+ by reacting with :
a. SO2
b. Cl2
c. PbO2
d. SnCl2

8. 06 Problem
A compound is treated with iodine and an alkali. It gives a yellow ppt. The
compound is?
a. Propionaldehyde
b. Benzophenone
c. Methyl acetate
d. Acetophenone

9. 07 Problem
Phenol is less acidic than :
a. Acetic acid
b. p-methoxy phenol
c. acetylene
d. ethanol

10. 08 Problem
Which reaction is not affected by change in pressure ?
a. H2 + I2  2HI
b. 2C + O  2CO
2
c. N2 + 3H2  2NH3
d. PCl5  PCl3 + Cl2

11. 09 Problem
Which of the following does not show Cannizaro reaction ?
a. CH3CHO
b. HCHO
c. C6H5CHO
d. (CH3)3C . CHO

12. 10 Problem
Oxidation state exhibited by chromium is given
a. + 6
b. + 4
c. 0
d. all of these

13. 11 Problem
Electronic configuration of chromium is given by :
a. [Ar]3d4, 4s2
b. [Ar]3d5, 4s1
c. [Ar]3d3, 4s2
d. none of these

14. 12 Problem
Benzene can react with :
a. Bromine water
b. HNO3
c. H2O
d. CH3OH

15. 13 Problem
Hydrogen boding is maximum in :
a. C2H5OH
b. CH3OCH3
c. (CH3)2C = O
d. CH3CHO

16. 14 Problem
Which of the following is non-metallic ?
a. B
b. Be
c. Mg
d. Al

17. 15 Problem
The compound not soluble in acetic acid is :
a. CaCO3
b. CaO
c. CaC2O4
d. Ca(OH)2

18. 16 Problem
Rate constant for a reaction is 10-3 s-1. Time to leave 25% reaction is :
a. 693 s
b. 1386 s
c. 6930 s
d. 2029 s

19. 17 Problem
A compound does not react with 2, 4 dinitrophenyl hydrazine, compound is :
a. Acetone
b. Acetaldehye
c. CH3OH
d. CH3CH2COCH3

20. 18 Problem
A meta directing functional group is :
a. - COOH
b. - OH
c. - CH3
d. - Br

21. 19 Problem
Which of the following is paramagnetic ?
a. O2+
b. CN –
c. CO
d. N2

22. 20 Problem
1, 2-dibromo cyclohexane on dehydrogenation gives :
a.
b.
c.
d. none of these

23. 21 Problem
Correct increasing order of first ionization potential is :
a. Na < Mg > Al < Si
b. Na < Mg < Al < Si
c. Na > Mg > Al > Si
d. Na < Mg < Al > Si

24. 22 Problem
If enthalpies of methane and ethane are respectively 320 and 560 cal, then the
bond energy of C – C bond is :
a. 60 cal
b. 80 cal
c. 40 cal
d. 120 cal

25. 23 Problem
A hydrocarbon contains 10.5 g carbon and 1 g hydrogen. Its 0.3 g has 1 L volume
at 1 atm and 1270C, hydrocarbon is :
a. C6H7
b. C7H8
c. C5H6
d. None of these

26. 24 Problem
How many bonding electron pairs are there is white phosphorus ?
a. 6
b. 12
c. 4
d. 8

27. 25 Problem
Addition of HBr two propylene in presence of benzoyl peroxide, follows :
a. Markownikoff’s rule
b. Baeyer’s rule
c. Carbanion mechanism
d. Anti-markownikoff’s rule

28. 26 Problem
On adding a solute to a solvent having vapour pressure 0.80 atm, vapour pressure
reduces to 0.60 atm. Mole fraction of solute is :
a. 0.25
b. 0.75
c. 0.50
d. 0.33

29. 27 Problem
Heavy water is :
a. Water containing Fe, Cr, Mn
b. Water at 00C
c. D20
d. Water obtained after distillation

30. 28 Problem
Volume of water needed to mix with 10 mL 10 N HNO3 to get 0.1 N HNO3 is :
a. 1000 mL
b. 990 mL
c. 1010 mL
d. 10 mL

31. 29 Problem
Which will show maximum depression in freezing point when concentration is 0.1
M?
a. NaCl
b. Urea
c. Glucose
d. K2SO4

32. 30 Problem
Which gives lactic acid on hydrolysis after reacting with HCN ?
a. HCHO
b. CH3CHO
c. C6H5CHO
d. CH3COCH3

33. 31 Problem
CHCl3 and KOH on heating with a compound form a bad smelling product,
compound is :
a. C2H5CN
b. C2H5NC
c. C2H5OH
d. C2H5NH2

34. 32 Problem
On exciting Cl2 molecules by UV light, we get :
a. Cl
b. Cl+
c. Cl-
d. All of these

35. 33 Problem
Correct statement about 1, 3-dibutene :
a. Conjugated double bonds are present
b. Reacts with HBr
c. Forms polymer
d. All of the above

36. 34 Problem
Isomerism due to rotation round single bond of carbon-carbon is :
a. Enantiomerism
b. Position isomerism
c. Conformation
d. Diastereo isomerism

37. 35 Problem
Which pair does not show hydrogen isotopes ?
a. Ortho and para hydrogen
b. Protium and deuterium
c. Deuterium and tritium
d. Tritium and protium

38. 36 Problem
Which pair cannot exist together in solution ?
a. NaHCO3 and NaOH
b. NaHCO3 and NaCl
c. NaHCO3 and Na2CO3
d. NaCl and Na2CO3

39. 37 Problem
When an electron is removed from an atom, its energy ;
a. Increases
b. Decreases
c. Remains the same
d. None of the above

40. 38 Problem
In a reaction, when the concentration of reactant is increased two times, the
increase in rate of reaction was four times. Order of reaction is :
a. Zero
b. 1
c. 2
d. 3

41. 39 Problem
Strongest base is :
a. C6H5NH2-
b. p-NO2 – C6H4NH2
c. m-NO2 – C6H4NH2
d. C6H5CH2NH2

42. 40 Problem
The value of one amu is :
1.66 x 10-24 g
6.023 x 1023 g
1.4 x 10-21 g
4.8 x 10-24 g

43. 41 Problem
Which of the following has minimum melting point ?
a. CsF
b. HCl
c. HF
d. LiF

44. 42 Problem
Which of the following is related with both wave nature and particle nature ?
a. Interference
b. E = mc2
c. Diffraction
d. E = hv

45. 43 Problem
Nirogen is obtained when NaNO2 react with :
a. NH4Cl
b. NH4NO3
c. (NH4)2CO3
d. NH4OH

46. 44 Problem
Hydrogen bond energy is equal to :
a. 3-7cal
b. 30-30cal
c. 3-10 kcal
d. 30-70 kcal

47. 45 Problem
Strongest hydrogen bond is present in :
a. F – H ………..O
b. S – H ………. O
c. O – H ………. S
d. F – H ……….. F

48. 46 Problem
Which of the following has dipole moment ?
a. CO2
b. p-dichlorobenzene
c. NH3
d. CH4

49. 47 Problem
Which of the following pKa values, represent the strongest acid ?
a. 10-4
b. 10-8
c. 10-5
d. 10-2

50. 48 Problem
Which group of the periodic table contains coinage metal ?
a. IIA
b. IB
c. IA
d. None of these

51. 49 Problem
Which of the following has maximum bond energy ?
a. Cl2
b. F2
c. Br2
d. I2

52. 50 Problem
For a process to spontaneous, the most favourable conditions is :
a. ∆H > 0, ∆ S > 0
b. ∆ H < 0, ∆ S > 0
c. ∆ H < 0, ∆ S < 0
d. ∆ H > 0, ∆ S < 0

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