Thursday, February 5, 2015

AIPMT 2015 Chemistry Online Model Test Paper- 3 Practice MCQs Multiple Choice Questions Fully Solved with Answer Key Free


  
AIPMT All India Pre Medical Test is conducted by CBSE in compliance with the directives of the Hon'ble Supreme Court of India for admissions to 15% seats of Medical/ Dental colleges of India. Some other State Govt university or  institutions also use AIPMT merit list for admission in the Medical Colleges/Dental Colleges against seats under their control. Here we have published model test paper for Chemistry for practice purpose with objective type MCQs multiple choice questions based on AIPMT previous years question papers.

AIPMT 2015 Chemistry Model Test Paper - 3


Q.1. The value of Planck's constant is 6.63 × 10–34 Js. The speed of light is 3 × 1017 nm s–1. Which value is closest to the wavelength in nanometer of a quantum of light with frequency of 6 × 1015 s–1 ?
1) 10
2) 25
3) 50
4) 75



Q.2. What is the maximum numbers of electrons that can be associated with the following set of quantum numbers ?
n = 3, l = 1 and m = –1.

1) 10
2) 6
3) 4
4) 2



Q.3. What is the activation energy for a reaction if its rate doubles when the temperature is raised from 20ºC to 35ºC ? (R = 8.314 J mol–1 K–1)
1) 342 kJ mol–1
2) 269 kJ mol–1
3) 34.7 kJ mol–1
4) 15.1 kJ mol–1



Q.4. A hydrogen gas electrode is made by dipping platinum wire in a solution of HCl of pH = 10 and by passing hydrogen gas around the platinum wire at one atm pressure. The oxidation potential of electrode would be ?
1) 0.059 V
2) 0.59 V
3) 0.118 V
4) 1.18 V



Q.5. A reaction having equal energies of activation for forward and reverse reactions has -
1) ΔS = 0
2) ΔG = 0
3) ΔH = 0
4) ΔH = ΔG = ΔS = 0



Q.6. Which of the following compounds will undergo racemisation when solution of KOH hydrolyses?


1) (iii) and (iv)
2) (i) and (iv)
3) (i) and (ii)
4) (ii) and (iv)



Q.7. Which of the following complex ion is not expected to absorb visible light?
1) ΔS is positive and, therefore, ΔH should be negative
2) ΔS is positive and, therefore, ΔH should also be highly positive
3) ΔS is negative and, therefore, ΔH should be highly positive
4) ΔS is negative and therefore, ΔH should be highly negative



Q.8. For the reversible reaction,
N2 (g) + 3H2 (g) -> 2NH3 (g) +Heat

The equilibrium shifts in forward direction

1) By decreasing the concentrations of N2(g) and H2(g)
2) By increasing pressure and decreasing temperature
3) By increasing the concentration of NH3(g)
4) By decreasing the pressure



Q.9. Using the Gibbs energy change, ΔG° = +63.3 kJ, for the following reaction,
Ag2CO3 <--> 2Ag+ + CO32-(aq)
the Ksp of Ag2CO3(s) in water at 250C is
(R= 8.314 JK-1 mol-1)

1) 2.9*10-3
2) 7.9*10-2
3) 3.2*10-26
4) 8.0*10-12



Q.10. Magnetic moment 2.83 BM is given by which of the following ions?
(At. nos. Ti = 22, Cr = 24, Mn = 25, Ni = 28)

1) Cr3+
2) Mn2+
3) Ti3+
4) Ni2+



Q.11. The correct order in which the O — O bond length increases in the following is :
1) H2O2 < O2 < O3
2) O3 < H2O2 < O2
3) O2 < O3 < H2O2
4) O2 < H2O2 < O3



Q.12. The mass of carbon anode consumed (giving only carbondioxide) in the production of 270 kg of aluminium metal from bauxite by the Hall process is : (Atomic mass Al = 27)
1) 180 kg
2) 120 kg
3) 360 kg
4) 90 kg



Q.13. In a set of reactions, acetic acid yielded a product D.

The structure of D would be :


1)
2)
3)
4)



Q.14. The cell membranes are mainly composed of :
1) Carbohydrates
2) Proteins
3) Phospholipids
4) Fats



Q.15. The major organic product formed from the following reaction :


1)
2)
3)
4)



Q.16. During the process of digestion, the proteins present in food materials are hydrolysed to amino acids. The two enzymes involved in the process

1) amylase and maltase
2) diastase and lipase
3) pepsin and trypsin
4) invertase and zymase



Q.17. The human body does not produce :
1) DNA
2) vitamins
3) hormones
4) enzymes



Q.18. CsBr crystallises in a body centred cubic lattice. The unit cell length is 436.6 pm. Given that the atomic mass of Cs = 133 and that of Br = 80 amu and Avogadro number being 6.02 x 1023 mo1-1, the density of CsBr is :
1) 42.5 g/cm3
2) 2.25 g/cm3
3) 0.225 g/cm3
4) 4.25 g/cm3



Q.19. More number of oxidation states are exhibited by the actinoids than by the lanthanoids.
The main reason for this is :

1) More energy difference between 5f and 6d orbitals than that between 4f and 5d orbitals
2) Lesser energy difference between 5f and 6d orbitals than that between 4f and 5d orbitals
3) Greater metallic character of the lanthanoids than that of the corresponding actinoids
4) More active nature of the actinoids



Q.20. Given : The mass of electron is 9.11 x 10-31 kg
Planck constant is 6.626 x 10-34 Js, the uncertainty involved in the measurement of
velocity within a distance of 0.1 Å is :

A) 5.79 x 106ms-1
B) 5.79 x 107ms-1
C) 5.79 x 108ms-1
D) 5.79 x 109ms-1






Answer Key: 

Q.1-
3
Q.2-
4
Q.3-
3
Q.4-
2
Q.5-
3
Q.6-
2
Q.7-
4
Q.8-
2
Q.9-
4
Q.10-
4
Q.11- 3 Q.12- 4 Q.13- 1 Q.14- 3 Q.15- 2
Q.16-
3
Q.17-
2
Q.18-
4
Q.19-
2
Q.20-
1


We have tried our best to present important questions with correct answer key. Any suggestion or update about any erroneous entry or answer is always appreciable. Please comment your score or any suggestion in comment section below.

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