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Hassan
1. When CuSO4 is electrolyzed in aqueous solution using copper electrodes, then the substance which deposits at the cathode is:
A. Copper metal.
B. Copper ions.
C. Hydrogen.
D. Copper metal.
2.Aldehydes can be synthesized by the oxidation of
A. Primary alcohol
B. Secondary Alchohal
C. Organic acids.
D. Primary alcohol
3. The products of the fermentation of a sugar are ethanol and
A. Water
B. Oxygen
C. Carban dioxide
D. Water
4.__________ serve as carriers of heredity from one generation to the other.
A. Lipids
B. Caseins
C. Formaldehydes.
D. Lipids
5. __________ extraction is controlled by partition law.
A. Iodine
B. Benzoic acid
C. Solvent
D. Iodine
6.The process of effusion is best understood by __________ law.
A. Grahm's
B. Charles's
C. Boyle's
D. Grahm's
7.__________ has dipole moment.
A. CO.
B. CO2
C. Benzene
D. CO.
8. __________ is used as catalyst in Haber’s process for NH3 gas manufacture.
A. Iron
B. Carbon
C. Copper
D. Iron
9. In many of its properties __________ is quite different from the other alkali metals.
A. Li.
B. Be.
C. Na.
D. Li.
10.Which element forms long chains alternating with oxygen?
A. Carbon
B. Silicon
C. Nitrogen
D. Carbon
11. The percentage of carbon in medium carbon steel is
A. 0.7-1.5.
B. 0.1-0.2.
C. 0.2-0.7.
D. 0.7-1.5.
12.Name the rare halogen among the following.
A. F.
B. Cl.
C. I.
D. F.
13.If inputs A = 1, B = 0 and output X = 1, then it corresponds to the operation of a:
A. AND Gate
B. NAND Gate
C. XNOR Gate
D. AND Gate
14.LASER is a device which can produce
A. Intense beam of light
B. Intense, Coherent, Monochromatic beam of light
C. Coherent beam of light
D. Intense beam of light
15.A crack allows greater amount of X-rays to pass, which appears on photographic film as
A. Blue Area
B. Dark Area
C. Bright Area
D. Blue Area
16.For intermediate energy of radiations, the dormant process is:
A. Compton Effec
B. Nuclear Effect
C. Photoelectric Effect
D. Compton Effec
17.Ultraviolent radiations cause:
A. Severe Crop Damage
B. Sunburn, blindness, skin cancer
C. Decay of Microorganisms
D. Severe Crop Damage
18.Two waves of slightly different frequencies and travelling in the same direction lead to:
A. Stationary Waves
B. Interference
C. Beats
D. Stationary Waves
19.What is it that we use to calculate the speeds of distant stars and galaxies?
A. Doppler Effect
B. Interference
C. Beats
D. Doppler Effect
20.In Young’s Double Slit Experiment, if the distance between slits and screen is doubled, then fringe spacing becomes:
A. Zero
B. One
C. Doubles of the original value
D. Zero
21.The information received at the other end of a fibre can be inaccurate due to _______ of the light signal.
A. Longer wavelengths
B. Frequency
C. Intensity
D. Longer wavelengths
22.The pressure on the other sides and everywhere inside the vessel will be according to the:
A. Pascal’s Law
B. Hook’s Law
C. Boyle’s Law
D. Pascal’s Law
23.For adiabatic process, the First Law of Thermodynamics is:
A. W = ∆U + Q
B. Q = – W
C. Q = W
D. W = ∆U + Q
24.The entropy of the universe always:
A. Decreases
B. Increases
C. Remains the same
D. Decreases
25.The work done in moving a unit positive charge from one point to another against the electric field is a measure of:
A. Capacitance
B. Potential difference between two points
C. Intensity of electric field
D. Capacitance
26.The scalar product of i and k is:
A. Zero
B. 90°
C. 1
D. Zero
27.If the body is rotating with uniform angular velocity, then its torque is
A. Zero
B. Clockwise
C. Maximum
D. Zero
28.If a certain force acts on an object and changes its kinetic energy from 65 J to 130 J, then work done by the force will be:
A. 92.5 J
B. 97.5 J
C. 65 J
D. 92.5 J
29.In a certain circuit, if the transistor has a collector current of 10 mA and base current of 50 μA, then the current gain of the transistor is
A. 250
B. 100
C. 150
D. 250
30.A signal that is applied at the inverting input terminal of an op-amplifier undergo amplification, at the output terminal with a phase shift of:
A. 0°
B. 270°
C. 360°
D. 0°
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