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Home » Medical Papers » UHS MDCAT » Aptitude Test - 37
1.Along a period, atomic radius decreases. This gradual decrease in radius is due to
A. Increase in number of electrons in valence shells
B. Increase in number of protons in the nucleus
C. Decrease in number of shells
D. Increase in number of electrons in valence shells
2.Detection of change and signaling for effector’s response to the control system is a
A. Negative feedback
B. Positive feedback
C. Inter-coordination
D. Negative feedback
3. What are three components of mechanism of homeostatic regulations?
A. Receptors, control centre and effectors
B. Sensory, motor and associative neurons
C. CNS, PNS and diffused nervous system
D. Receptors, control centre and effectors
4.Which one pair has the same oxidation state of ‘Fe’?
A. FeSO4 and FeCl3
B. FeCl2 and FeCl3
C. FeSO4 and FeCl2
D. FeSO4 and FeCl3
5.Blood enters the glomerulus through
A. Efferent arteriole
B. Afferent arteriole
C. Renal artery
D. Efferent arteriole
6.Oxidation state of ‘Fe’ in K3[Fe(CN)6] is:
A. +2
B. +3
C. -6
D. +2
7.Which portion of nephron is under the control of ADH?
A. Bowman’s capsule
B. Ascending arm
C. Distal and collecting ducts
D. Bowman’s capsule
8.The nature of an aqueous solution of ammonia (NH3) is:
A. Amphoteric
B. Neutral
C. Acidic
D. Amphoteric
9.Cause of Parkinson’s disease is death of brain cells that produce
A. Dopamine
B. Acetylcholine
C. ADH hormone
D. Dopamine
10.Unpolluted rain water has a pH of:
A. 4.9
B. 5.6
C. 5.3
D. 4.9
11.In comparison with oxygen gas, a strong triple bond is present between two nitrogen atoms in a molecule and therefore nitrogen gas is:
A. Highly reactive gas
B. Completely inert like noble gases
C. Moderately reactive gas
D. Highly reactive gas
12.The catalyst used in the Haber’s process is:
A. Magnesium oxide
B. Aluminium oxide
C. Silicon oxide
D. Magnesium oxide
13.Select the nucleophile from the following examples:
A. NO2
B. NH3
C. NO2 +
D. NO2
14.The order of reactivity of alkyl halides towards nucleophile is:
A. RI > RBr > RF > RCl
B. RI > RBr > RCl > RF
C. ) RF > RCl > RBr > R
D. RI > RBr > RF > RCl
15.Which set of the prefixes gives values in increasing order?
A. Pico, Mega, Kilo, Tera
B. Pico, Micro, Mega, Giga
C. Tera, Pico, Micro, Kilo
D. Pico, Mega, Kilo, Tera
16.An oil film floating on water surface exhibits colour pattern due to the phenomenon of:
A. Diffraction
B. Polarization
C. A) Diffraction C) Interference
D. Diffraction
17.For the horizontal pipe, the fluid inside it is flowing horizontally then Bernoulli’s equation can be written as
A. P + ρv2 = constant
B. 2P + ρv2 = constant
C. P + 2ρv2 = constant
D. P + ρv2 = constant
18.The value of the least distance of distinct vision or near point is ______ for a normal human eye.
A. 20 cm
B. 25 cm
C. 10 cm
D. 20 cm
19.In a compound microscope, the magnification by objective = 20, magnification by eyepiece = 11, then the total magnification is
A. M = -220
B. M = -0.19
C. M = -0.05
D. M = -220
20.The distance between atoms is 0.30 nm. What will be the wavelength of X-rays at angle θ = 30o for 1st order diffraction?
A. λ = 0.60 nm
B. λ = 0.30 nm
C. λ = 0.20 nm
D. λ = 0.60 nm
21.A 100 kg man is standing in an elevator, which accidently falls freely. What will be the weight of the person in the freely falling elevator (take g=10 m/s2)
A. 1000 N
B. 10 N
C. 500 N
D. 1000 N
22.Frequency of simple pendulum of length 9.8 m will be
A. 2 π Hertz
B. π/2 Hertz
C. 1/2Ï€ Hertz
D. 2 π Hertz
23.A body performs simple harmonic motion with a period of 0.063 s. The maximum speed of 3.0 ms-1. What are the values of the amplitude ‘xo (m)’ and angular frequency ‘ω (rads-1)’?
A. xo = 0.03, ω = 100
B. xo = 0.19, ω = 16
C. xo = 5.3, ω = 16
D. xo = 0.03, ω = 100
24.Food being cooked in microwave oven is an example of
A. Beats
B. Overtones
C. Resonance
D. Beats
25.A gas containing ‘N’ number of molecules of a gas having mass of each molecule ‘m’ is in a cubic container having length of each side ‘a’. What is the density of gas contained in cube?
A. N/a2
B. m/a3
C. Nm/a3
D. N/a2
26.In ‘General Gas Equation PV=nRT’, ‘n’ represents the number of moles of gas. Which of the following represents the relation of ‘n’?
A. n = NNA
B. n = N/NA
C. n = NA/N
D. n = NNA
27.At triple point of water, the pressure of gas is 2680 Pa, by changing ‘T’ the pressure increases to 4870 Pa. Then ‘T’ is:
A. 496.38 K
B. 438.96 K
C. Zero
D. 496.38 K
28.A heat engine working according to second law of thermodynamics has 50% efficiency. What will be the temperature of its low temperature reservoir if high temperature reservoir is 327 oC?
A. 27 oC
B. 127 oC
C. 300 oC
D. 27 oC
29.A solenoid 15 cm long has 300 turns of wire. A current of 5 A flows through it. What is the magnitude of magnetic field inside the solenoid?
A. 75 x 107 T
B. 60 x 10+3 T
C. 4Ï€ x 10-3 T
D. 75 x 107 T
30.Due to current in a straight conductor the difference between magnetic field lines
A. Increases away from conductor
B. Decreases away from conductor
C. Increases towards conductor
D. Increases away from conductor
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