The previous years question paper for the AIIMS Examination which is required for preparation purpose is as given below:

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

6. An alternatmg voltage V = V0sin ωτ is applied across a circuit. As result I = I0 sin(ωτ)- π/2)flows ill it. The power consumed per cycle is

(a) zero
(b) 0.5 V0I0
(d) 0.707 V0I0
(d) 1.414 V0I0

7. A slab consist of two portions of different materials of same thickness and having the conductivities K1 and K2. The equivalent thermal conductivity of the slab is

7

8. A prism is made up 0f material of refractive index √3. The angle of prism is A. If the angle of minimum deviation is equal to the angle of the prism, then the value of A is
(a) 30o
(b) 45o
(c) 60o
(d) 75o

9. The following table
9
is a truth table for

(a) NAND gate
(b) NOR gate
(c) XOR gate
(d) AND gate

10. The half-life of a radioactive substance is 10 day. This means that

(a) the substance completely disintegrates in 20 days.
(b) the substance completely disintegrates in 40 days.
(c) 1/8 part at the mass of the substance will be left intact at the end of 40 days
(d) 7/8 part of the mass of the substance disintegrates in 30 days.

Chemistry

1. Aspirin acts as an analgesic because it

(a) inhibits the synthesis of prostaglandins which stimulates inflammation of the tissue
(b) prevents the release of HCL in the stomach
(c) Prevents the interaction of histamine with its receptor
(d) inhibit activities of enzymes

2. Starch is a mixture of two components, a water soluble component amylase (15-20%) and a water insoluble component amylopectin (80-85%). The aqueous solution, of amylase gives a blue colour with iodine solution due to the formation of

(a) amylose iodide
(b) amylose iodate
(c) inclusion complex
(d) amylase tetraiodide complex

3. What reagent is used in the Hinsberg test of amines?

(a) (CH3CO)2O and pyridine
(b) C6H3SO2CI in aq NaOh
(c) NaNo2 in aq H2 SO4
(d) CH3l(excess) followed by AgOH

4. Aldol condensation between which of the following two compounds followed by dehydration gives methyl vinyl ketone?

(a) Formaldehyde and acetone
(b) Formaldehyde and acetaldehyde
(c) Two molecules of acetone
(d) Two molecules of acetaldehyde

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?
7

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+

Biology

1. Speciation of sympatric Species is due to

(a) geographic isolation
(b) reproductive isolation
(c) isolation/separation
(d) migration

2. The application of synthetic plant hormone like IAA, IBA and NAA are best described as

(a) prevent early fruit fall before harvesting and ts used to produce parthenocarpic fruit
(b) prevent early fruit tall only
(c) to produce both seed less fruits and fruits with seeds
(d) to produce larger fruit

3. Flame cells and Malpighian tubules are the analogous organ in

(a) insects and arthropods respectively
(b) arthropods and echinodermates respectively
(c) helminths and arthropods with other insect respectively
(d) arthropods and other insect with helminths respectively

4. Trochlear, trigeminal and glosspharyngeal nerve are respectively

(a) IX, V and IV
(b) IV, V and IX
(c) V, IV and IX
(d) IV, V and IX

5. Who had proposed theory of cohesion and adhesion forces?
(a) Dixon and Jolly (1894)
(b) Dixon and Benson (1885)
(c) Dixon and Jolly (1950)
(d) Sir Jagdish Chandra Bose (1850)

6. Which one of the following useful organisms is not a part in production of curd/yoghurt?

(a) S. thermophiluS
(b) Lactobacillus bulgaricus
(C) Acetobactor aceti
(d) Streptococcus lactis

7. The drugs, which do not develop physiological dependence is
(a) sedative and tranqualisers
(b) stimulational cocaine
(c) opiates
(d) hallucinogens

8. Organogenesis or morphogenesis in tissue culture is controlled/regulated by phytohormones the credit of this important discovery goes to

(a) Skoog and Miller (1957)
(b) Guha and Maheswan (1964)
(c) Calvin and Benson (1894)
(d) Halperin and Wetherell (1964)

9. A man whose father is a colourblind, marry a woman, who is a daughter of colourblind mother. The offspring of this couple will be

(a) all daughter and sons are colourblind
(b) 50% colourblind and 50% normal son
(c) carrier normal daughter and colourblind sons
(d) colourblind sons and normal daughter

10. In a child of 15 years age, plasma calcium level is diagnosed below optimum level. Which organ is malfunctioning?

(a) Thyroid gland
(b) Liver
(c) Parathyroid
(d) Posterior lobe of pituitary