The previous year question paper of AIIMS or All India Institute of Medical Sciences Entrance Exam for admission in MBBS program is as follows:

Physics

1. To obtain a p-type germanium semiconductor, it must be doped with

(a) arsenic
(b) antimony
(c) Indium
(d) phosphorous

2. Sound waves do not.show the phenomenon of

(a) interference
(b) diffraction
(e) refraction
(d) polarisation

3. The magnifying power of a compound microscope is high If

(a) both me objective and the eyepiece has short focal lengths
(b) both the objectve and the eyepiece have long focal lengths
(c) the objective has a Short focal length and the eyepiece has a long focal length
(d)the objective has a long focal length and the eyepiece has a short focal length

4. 1 curie is

(a) 1 dps
(b) 3 x 1010dps
(c) 106 cos
(d) 3.7 x 1010dps

5. To double the covering range of a TV transmitter tower, its height should be made

(a) 2 times
(b) 4 times
(c) √2 times
(d) 8 times

5.Grignard reagents and organolithium compounds on addition to dry ice separately, followed by hydrolysis gives

(a) ketones and carboxylic acids respectively
(b) carboxylic acids and ketones respectively
(c) only carboxylic acids
(d) onty ketones

6.The strongest acid among the following is

(a) o-methoxy phenol
(b) p-methoxy phenol
(c) m-methoxy phenol
(d) phenol

7. On commercial scale phenol is obtained from chlorobenzene. The chlorobenzene needed for the purpose is prepared by Raschig’s process. Which one of the following is Raschig’s process?


8. How many mL of 0.125 M Cr3+ must be reacted with 12.00 mL of 0.200 M MnO4 if the redox products are CrO2/7– and Mn2+?

(a) 8 mL
(b) 16 mL
(c) 24 mL
(d) 32 mL

9. At 300 K, 36 g of glucose present per litre in its solution has an osmotic pressure of 4.98 bar. If the osmotic pressure of solution is 1.52 bar at the same temperature, what would be its concentration?

(a) 11gL-1
(b) 22gL-1
(c) 36gL-1
(d) 42gL-1

10. The composition of a sample of wustite is Fe0.93O. What percentage of the iron is present in the form of Fe (III)?

(a) 5%
(b) 7 08%
(c) 15.05%
(d) 23.6%

11. When acidified K2Cr2O7 solution is added to Sn2+ salts, then Sn2+ changes to

(a) Sn
(b) Sn3-
(c) Sn4+
(d) Sn4+

12. What would be the expected product of the reaction of propyne with Br2/H2O if the mechanism of this reaction is analogous to that of propene?

(a) 2-brompropenol
(b) Bromoacetone
(c) 2-boromo-b-propanol
(d) Bromoprophenol

13. Which of the following carbocation would have the greatest stability?


14. Electron affinity is positive, when

(a) O changes into O–
(b) O changes into O2-
(c) O changes into O+
(d) election affinity is always negative

15. Which one of the following pairs represents stereoisomerism ?
(a) Chain isomerism and rotational isomerism
(b) Structural isomerism and geometrical isomerism
(c) Linkage isomerism and geometrical isomerism
(d) Optical isomerism and geometrical isomerism

16. Using the data given below find out the strongest reducing agent


17. EMF of Daniell cell was found using different concentrations of Zn2+ ion and Cu2+ ion. A graph was then plotted between Ecell and log [Zn2+]/[Cu2+] found to be linear with intercept on Ecell axis equal to 1.10 V.Ecell for Zn/Zn2+ (0.1M)|| Cu 2+ (00.1M)| Cu will be

(a) 1.10 V
(b) 1.0705 V
(c) 0.93 V
(d) 0.078 V

18. Which of the following process is not responsible for the presence of electric charge on the sol particles?

(a) Electron capture by sot particles
(b) Adsorption of one species from solution
(c) Formation of Helmholtz electrical double layer
(d) Absorption of ionic species horn solution

19. In the metallurgy of aluminium

(a) Al3+ is oxidised to Al (s)
(b) graphite anode is oxidised to carbon monoxide and carbon dioxide
(c) oxidation state of oxygen changes in the reaction at anode
(d) oxidation state of oxygen changes in the overall reaction involved in the process

20. In the preparation of HNO3 we get NO gas by catalytic oxidation of ammonia. The moles of NO produced by the oxidation of two moles of NH3 will be

(a) 2
(b) 3
(c) 4
(d) 6

Attached Files

AIIMS MBBS Question Papers.doc (148.5 KB, 93 views)