AIPMT ONLINE TEST SERIES-CHEMISTRY(2)

Jan 22 • Medical Sample Papers • 14 Views • 16 Comments

The AIPMT (All India Pre Medical Test)Prelims exam is a national level entrance exam conducted by Central Board of Secondary Education (CBSE), Delhi. This exam is conducted for students to get admission to MBBS and BDS courses in most of the medical colleges across the country. Students appearing for this exam are tested on the subjects- Physics, Chemistry, and Biology.

This exam consists of two level. One is Preliminary conducted usually on 1st Sunday of the April month and the second is Mains conducted in the month of May.

All the students who want to take admission to MBBS & BDS courses they have to do hard work for the entrance exam AIPMT. The best score in the exam provides them a good medical college.

 

chemistry exam

AIPMT chemistry exam

AIPMT ONLINE TEST SERIES-CHEMISTRY:

1. The state of hybridization of C2, C3, C5 and C6 of the hydrocarbon,

is in the following sequence:
1) sp3, sp2, sp2 and sp
2) sp, sp2, sp2 and sp3
3) sp, sp2, sp3 and sp2
4) sp, sp3, sp2 and sp3

2. Oxidation numbers of P in PO43-, of S in SO42- and that of Cr in Cr2O72-, are respectively :
1) + 3, + 6 and + 5
2) + 5, + 3 and + 6
3) – 3, + 6 and + 6
4) + 5, + 6 and + 6

3. Lithium metal crystallises in a body centred cubic crystal. If the length of the side of the unit cell of lithium is 351 pm, the atomic radius of the lithium will be:
1) 151.8 pm
2) 75.5 pm
3) 300.5 pm
4) 240.8 pm

4. Which of the following reactions is an example of nucleophilic susbtitution reaction?
1) 2 RX + 2 Na → R – R + 2 NaX
2) RX + H2 → RH + HX
3) RX + Mg → RMgX
4) RX + KOH → ROH + KX

5. In the case of alkali metals, the covalent character decreases in the order:
1) MF > MCl > MBr > MI
2) MF > MCl > MI > MBr
3) MI > MBr > MCl > MF
4) MCl > MI > MBr > MF

6. Which one of the elements with the following outer orbital configurations may exhibit the largest number of oxidation states?
1) 3d54s1
2) 3d54s2
3) 3d24s2
4) 3d34s2

7. The stability of + 1 oxidation state increases in the sequence:
1) Tl < In < Ga < Al
2) In < Tl < Ga < Al
3) Ga < In < Al < Tl
4) Al < Ga < In < Tl

8. Given:
(i) Cu2+ + 2e− → Cu, E° = 0.337 V
(ii) Cu2+ + e− → Cu+, E° = 0.153 V
Electrode potential, E° for the reaction, Cu+ + e− → Cu, will be:
1) 0.90 V
2) 0.30 V
3) 0.38 V
4) 0.52 V

9. For the reaction N2 + 3H2 → 2NH3, if (d[NH3])/dt = 2 x 10-4 mol L-1 s-1, the value of (-d[H2])/dt would be :
1) 4 × 10-4 mol L-1 s-1
2) 6 × 10-4 mol L-1 s-1
3) 1 × 10-4 mol L-1 s-1
4) 3 × 10-4 mol L-1 s-1

10. Consider the following reaction,
the product Z is:
1) CH3CH2 – O – CH2 – CH3
2) CH3 – CH2 – O – SO3H
3) CH3CH2OH
4) CH2 = CH2

11. The energy absorbed by each molecule (A2) of a substance is 4.4 × 10-19 J and bond energy per molecule is 4.0 × 10-19 J. The kinetic energy of the molecule per atom will be:
1) 2.2 × 10-19 J
2) 2.0 × 10-19 J
3) 4.0 × 10-20 J
4) 2.0 × 10-20 J

12. Amongst the elements with following electronic configurations, which one of them may have the highest ionization energy?
1) Ne [3s23p2]
2) Ar [3d104s24p3]
3) Ne [3s23p1]
4) Ne [3s23p3]

13. In the reaction BrO-3 (aq) + 5 Br-(aq) + 6H+ → 3 Br2(l) + 3 H2O(l). The rate of appearance of bromine (Br2) is related to rate of disappearance of bromide ions as follwing :
1)

2)
3)
4)

14. A 0.0020 m aqueous solution of an ionic compound Co(NH3)5 (NO2)Cl freezes at – 0.00732°C. Number of moles of ions which 1 mol of ionic compound produces on being dissolved in water will be (kf = – 1.86°C/m)
1) 3
2) 4
3) 1
4) 2

15. What is the dominant intermolecular force or bond that must be overcome in converting liquid CH3OH to a gas?
1) Dipole-dipole interaction
2) Covalent bonds
3) London dispersion force
4) Hydrogen bonding

16. Which of the following oxides is not expected to react with sodium hydroxide?
1) CaO
2) SiO2
3) BeO
4) B2O3

17. The segment of DNA which acts as the instrumental manual for the synthesis of the protein is:
1) Ribose
2) Gene
3) Nucleoside
4) Nucleotide

18. Maximum number of electrons in a subshell of an atom is determined by the following:
1) 2 l + 1
2) 4 l – 2
3) 2 n2
4) 4 l + 2

19. Half life period of a first-order reaction is 1386 seconds. The specific rate constant of the reaction is:
1) 0.5 × 10-2 s-1
2) 0.5 × 10-3 s-1
3) 5.0 × 10-2 s-1
4) 5.0 × 10-3 s-1

20. Which one of the following is employed as a tranquilizer?
1) Naproxen
2) Tetracycline
3) Chlorpheninamine
4) Equanil

21. Al2O3 is reduced by electrolysis at low potentials and high currents. If 4.0 × 104 amperes of current is passed through molten Al2O3 for 6 hours, what mass of aluminium is produced? (Assume 100% current efficiency. At. mass of Al = 27 g mol-1 )
1) 8.1 × 104 g
2) 2.4 × 105 g
3) 1.3 × 104 g
4) 9.0 × 103 g

22. Benzene reacts with CH3Cl in the presence of anhydrous AlCl3 to form:
1) Chlorobenzene
2) Benzylchloride
3) Xylene
4) Toluene

23. Which of the following is not permissible arrangement of electrons in an atom?
1) n = 5, l = 3, m = 0, s = + 1/2
2) n = 3, l = 2, m = – 3, s = – 1/2
3) n = 3, l = 2, m = -2, s = – 1/2
4) n = 4, l = 0, m = 0, s = – ?

24. The dissociation constants for acetic acid and HCN at 25°C are 1.5 × 10−5 and 4.5 × 10−10 respectively. The equilibrium constant for the equilibrium
CN− + CH3COOH HCN + CH3COO− would be:
1) 3.0 × 10−5
2) 3.0 × 10−4
3) 3.0 × 104
4) 3.0 × 105

25. Propionic acid with Br2| P yields a dibromo product. Its structure would be:
1)
2) CH2Br – CH2 – COBr
3)
4) CH2Br – CHBr – COOH

26. The values of ΔH and ΔS for the reaction, C(graphite) + CO2 (g) → 2CO(g) are 170 kJ and 170 JK−1, respectively. This reaction will be spontaneous at
1) 910 K
2) 1110 K
3) 510 K
4) 710 K

27. Copper crystallises in a face-centred cubic lattice with a unit cell length of 361 pm. What is the radius of copper atom in pm?
1) 157
2) 181
3) 108
4) 128

28. Predict the product :

1) PhCH2CH2CHO2) PhCOCH2CH33) PhCH2COCH34) PhCOCOMe

 

29. H2COH . CH2OH on heating with periodic acid gives:
1) 2 HCOOH
2)
3)
4) 2 CO2

30. According to MO theory which of the following lists ranks the nitrogen species in terms of increasing bond order?
1) N22- < N2- < N2
2) N2 < N22- < N2-
3) N2- < N22- < N2
4) N2- < N2 < N22-

31. Out of TiF62-, COF63-, Cu2 Cl2 and NiCl42- (Z of Ti = 22, CO = 27, Cu = 29, Ni = 28) the colourless species are :
1) Cu2Cl2 and NiCl42-
2) TiF62- and Cu2Cl2
3) COF63- and NiCl42-
4) TiF62- and COF63-

32. Which of the following molecules acts as a Lewis acid?
1) (CH3)2O
2) (CH3)3P
3) (CH3)3N
4) (CH3)3B

33. The IUPAC name of the compound having the formula CH ≡ C – CH = CH2 is:
1) 1-butyn-3-ene
2) but-1-yne-3-ene
3) 1-butene-3-yne
4) 3-butene-1-yne

34. Which of the following compounds will exhibit cis-trans (geometrical) isomerism?
1) Butanol
2) 2-Butyne
3) 2-Butenol
4) 2-Butene

35. Which of the following does not show optical isomerism?
1) [CO(NH3)3Cl3]0
2) [CO (en) Cl2 (NH3)2]+
3) [CO (en)3]3+
4) [CO (en)2Cl2]+ (en = ethylenediamine)

36. Structures of some common polymers are given. Which one is not correctly presented?
1) Neoprene

2) Terylene

3) Nylon 66

4) Teflon

 

37. The ionization constant of ammonium hydroxide is 1.77 × 10-5 at 298 K. Hydrolysis constant of ammonium chloride is:
1) 6.50 × 10-12
2) 5.65 × 10-13
3) 5.65 × 10-12
4) 5.65 × 10-10

38. Consider the following reaction:,

the product Z is:
1) Benzaldehyde
2) Benzoic acid
3) Benzene
4) Toluene

39. The equivalent conductance of M/32 solution of a weak monobasic acid is 8.0 mhos cm2 and at infinite dilution is 400 mhos cm2. The dissociation constant of this acid is :
1) 1.25 × 10-6
2) 6.25 × 10-4
3) 1.25 × 10-4
4) 1.25 × 10-5

40. The straight chain polymer is formed by:
1) hydrolysis of CH3 SiCl3 followed by condensation polymerisation
2) hydrolysis of (CH3)4 Si by addition polymerisation
3) hydrolysis of (CH3)2 SiCl2 followed by condensation polymerisation
4) hydrolysis of (CH3)3 SiCl followed by condensation polymerisation

41. From the following bond energies:
H − H bond energy: 431.37 kJ mol-1
C = C bond energy: 606.10 kJ mol-1
C − C bond energy: 336.49 kJ mol-1
C − H bond energy: 410.50 kJ mol-1
Enthalpy for the reaction,

will be:
1) -243.6 kJ mol-1
2) -120.0 kJ mol-1
3) -553.0 kJ mol-1
4) -1523.6 kJ mol-1

42. 10 g of hdyrogen and 64 g of oxygen were filled in a steel vessel and exploded. Amount of water produced in this reaction will be:
1) 3 mol
2) 4 mol
3) 1 mol
4) 2 mol

43. Among the following which is the strongest oxidising agent?
1) Br2
2) I2
3) Cl2
4) F2

44. In which of the following molecules / ions BF3, NO2-, NH2- and H2O, the central atom is sp2 hybridized?
1) NH2- and H2O
2) NO2- and H2O
3) BF3 and NO2-
4) NO2- and NH2-

45. Nitrobenzene can be prepared from benzene by using a mixture of conc. HNO3 and conc. H2SO4 in the mixture, nitric acid acts as a/an:
1) Acid
2) Base
3) Catalyst
4) Reducing agent

46. Which of the following complex ions is expected to absorb visible light?
1) [Ti (en)2 (NH3)2]4+
2) [Cr (NH3)6]3+
3) [Zn (NH3)6]2+
4) [Sc (H2O)3 (NH3)3]3+

47. What is the [OH -] in the final solution prepared by mixing 20.0 mL of 0.050 M HCl with 30.0 mL of 0.10 M Ba(OH)2?
1) 0.40 M
2) 0.0050 M
3) 0.12 M
4) 0.10 M

48. Trichloroacetaldehyde, CCl3CHO reacts with chlorobenzene in presence of sulphuric acid and produces:
1)
2)
3)

49. For the reaction A + B → products, it is observed that:
(a) on doubling the initial concentration of A only, the rate of reaction is also doubled and
(b) on doubling the initial concentrations of both A and B, there is a change by a factor of 8 in the rate of the reaction.
The rate of this reaction is given by:
1) rate = k [A] [B]2
2) rate = k [A]2 [B]2
3) rate = k [A] [B]
4) rate = k [A]2 [B]

50. Which of the following hormones contains iodine?
1) testosterone
2) adrenaline
3) Thyroxine
4) insulin

ANSWERS

1)4 2)4 3)1 4)4 5)3 6)2 7)4 8)4 9)4 10)3
11)4 12)4 13)4 14)4 15)4 16)1 17)2 18)4 19)2 20)4
21)1 22)4 23)2 24)3 25)3 26)2 27)4 28)2 29)3 30)1
31)2 32)4 33)3 34)4 35)1 36)1 37)4 38)2 39)4 40)3
41)2 42)2 43)4 44)3 45)2 46)2 47)4 48)1 49)1 50)3

 

YOUTUBE LINK: AIPMT CHEMISTRY BASIC CONCEPTS

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