UHS 2008

Q.1 When a helium atom loses an electron, it becomes:

A) An alpha particle.
B) Proton.
C) A positive helium ion
D) A negative helium ion.

Q.2 Beta ray emitted by a radioactive substance is:

A) An electron which was existing outside the nucleus.
B) An electron which was existing inside the nucleus.
C) An electron emitted by the nucleus as a result of the decay of neutron inside the nucleus.
D) A pulse of electromagnetic wave.

Q.3 An electric charge in uniform motion produces:

A) An electric field.
B) A magnetic field.
C) Both magnetic and electric fields.
D) Neither magnetic nor electric fields.

Q.4 What is emitted by a hot metal filament in a cathode ray tube?

A) X-ray.
B) Proton.
C) Electron.
C) Electron.

If the mass of the bob of a pendulum is doubled its time period is:

A) Halved
B) Doubled.
C) Unchanged.
D) Increases four times.

Q.6 The centre of Newton rings is dark due to:

A) Polarization.
B) Destructive interference.
C) Constructive interference.
D) Reflection.

Q.7 Which one is most stable element on the basis of binding energy?

A) Sn.
B) Ba.
C) Kr.
D) Fe.

Q.8 Resistance in RC circuit of time constant 2 seconds is 1000 Ohms. What is value of C in the

A) 2 μ farad.
B) 20 μ farad
. C) 200 μ farad.
D) 2000 μ farad

Q.9 The Lenz’s law refers to induced __________

A) emf.
B) Resistance
C) Shear.
D) Currents.

Q.10 In which of the following, output is similar to NAND gate if input A=0 and input B=1.

A) NOR
B) XNOR
C) XOR.
D) Both B and C.

Q.11 For atomic hydrogen spectrum, which of the following series lies in visible region of

electromagnetic spectrum?

A) Lyman series.
B) Paschen series
. C) Balmer series.
D) Bohr series.

Q.12 __________ are the particles that experience strong nuclear force.

A) Electrons
B) Muons.
C) Neutrinos.
D) Neutrons.

Q.13 The vertical velocity of ball thrown upward __________ with time.

A) Decreases linearly
B) Remains constant
C) Doubles.
D) Decreases parabolically.

Q.14 The force required to bend the normally straight path of a particle into a circular path is called

__________ force.

A) Traveling.
B) Bending.
C) Centrifugal
D) Centripetal.

Q.15 A disc at rest without slipping, rolls down a hill of height (3 x 9.8) m. What is its speed in m/sec

when it reaches at the bottom?

A) 11.4
B) 19.6.
C) 22.8.
D) 9.8.

Q.16 Tuning of the radio is the best example of electrical __________

A) Resonance
B) Resistance
C) Current.
D) None of these.

Q.17 A standing wave pattern is formed when the length of string is an integral multiple of

__________ wavelength.

A) Triple
B) Full
C) Half
D) Double.

Q.18 Which of the following lights travels the fastest in optical fibres?

A) Visible light.
B) Invisible infra-red.
C) Ultra-violet.
D) Ordinary light

Q.19 The algebraic sum of potential changes in a closed circuit is zero is Kirchhoff’s __________ rule.

A) First
B) Second.
C) Third.
D) None of these

Q.20 In LED when an electron combines with a __________ during forward bias conduction, a photon of visible light is emitted.

A) High voltage
B) Photon
C) Hole
D) Positron

Q.21 For photons of energy greater than 1.02 MeV the probability of pair production occurrence

__________ as the energy increases.

A) Increase.
B) Completely diminishes
C) Reduces to half.
D) Remains unchanged.

Q.22 The neutron is assumed to be made of

A) One up quark and two down quarks
B) Two up quarks and two down quarks
C) Two up quarks and one down quark.
D) One up quark and one down quark.

Q.23 An __________ missile is called a ballistic missile.

A) Un-powered and guided
B) Un-guided and powered
C) Powered and guided.
D) Un-powered and un-guided

Q.24 Two cylinders of equal mass are made from same material. The one with the larger diameter accelerates __________ the other under the action of same torque

A) Faster than
B) Slower than
C) Equal to
D) None of these

Q.25 The angular frequency of simple pendulum is directly proportional to __________

A) l.
B) 1/l
C) v l.
D) v1/l.

Q.26 Two waves of slightly different frequencies and traveling in same direction produce ________

A) Interference
B) Polarization
C) Stationary waves.
D) Beats.

Q.27 A single mode step index fibre has core of about __________ μm diameter

A) 50 to 1000
B) 50.
C) 30
D) 5

Q.28 A 5 Ohm resistor is indicated by a single __________ color band around its body.

A) Red
B) Green
C) Blue
D) Brown

Q.29 Practically __________ current flows in a reverse biased p-n junction.

A) No
B) Very large
C) Few milliamperes
D) Both A and C.

Q.30 Cesium coated oxidized silver emits electrons for __________ light.

A) Infrared
B) Ultraviolet
C) Visible.
D) Green

Q.31 The cobalt is absorbed by

A) Bones
B) Skin
C) Liver
D) Thyroid gland

Q.32 In a step-down transformer the output current __________

A) Is reduced
B) Is increased
C) Remains same
D) None of these

Q.33 Force in terms of base units is expressed as

A) kg ms-2
B) kg m2s-2
C) kg m2 s-3 .
D) None of these.

Q.34 100 joules work has been done by an agency in 10 seconds. What is power of agency?

A) 1000 watt
B) 100
C) 10 watt
D) 0.10 watt

Q.35 The acceleration is proportional to the displacement and is directed towards mean position in__________ motion.

A) Gravity
B) Simple harmonic
C) Uniform
D) Projectile

Q.36 In gases, the speed of sound is inversely proportional to __________ of the density when other factors are same.

A) Square root
B) Square
B) Square
D) Third root

Q.37 A watch maker uses __________ to repair the watches.

A) Telescope
B) Convex mirror
C) Convex lens
D) Concave lens

Q.38 A 2m long pipe is open at both ends. What is its harmonic frequency?

A) 42.5 Hz
B) 85 Hz
C) 220 Hz
D) None of these

Q.39 A wire has resistance 100 Ohm at 0 oC and 200 Ohm at 100 oC. What is its temperature coefficient in K-1?

A) -0.01
B) -1/273
C) 0.01
D) 1/273

Q.40 The net magnetic field created by the electrons within an atom is due to the field created by their __________ motion

A) Orbital
B) Spin
C) Orbital & spin
D) Orbital x spin

Q.41 At high temperature, the proportion of __________ wavelength radiation increase.

A) AM radio
B) Long radio
C) Shorter
D) Both A and C.

Q.42 In photoelectric effect removal of photons is observed at _________ energies.

A) Low
B) High
C) Intermediate
D) Both A and C

Q.43 Which device is the most efficient?

A) Nuclear reactor
B) Storage battery
C) Silicon solar cell
D) Dry battery cell

Q.44 The units of E in E=mc2 are

A) kg m s-2 .
B) N m s-2.
C) kg m2 s-2.
D) Both B and C

Q.45 Work done on a body equals change in its __________ energy.

A) Total
B) Potential
C) Kinetic
D) All of these.

Q.46 A pipe varies uniformly in diameter from 2 m to 4 m. An incompressible fluid enters the pipe with velocity 16m/sec. What is velocity of fluid when it leaves the pipe?

A) 64 m/sec
B) 32 m/sec
C) 8 m/sec
D) 4 m/sec

Q.47 Transverse waves cannot be setup in __________

A) Metals
B) Solids
C) Fluids
D) Soil

Q.48 The ratio of the __________ is called magnification.

A) Image size to object size
B) Object size to image size
C) Eyepiece size to object size.
D) None of these

Q.49 Which of the following has the highest resistivity?

A) Germanium
B) Silver
C) Copper
D) Platinum

Q.50 An n-type semi-conductor is made by doping silicon crystal with __________

A) Indium
B) Aluminium
C) Arsenic
D) Both B and C

Q.51 Objects cannot be accelerated to the speed of light in free space is consequence of

A) Mass variation
B) Energy-mass relationship
C) Inertia forces.
D) All of these.

Q.52 A certain radioactive mass decays from 64 gm to 2 gm in 20 days. What is its half-life?

A) 5 days
B) 4 days
C) 10 days.
D) 6 days.

Q.53 If inductance is denoted by L and resistance by R, which of the following is true for a choke?

A) R is large, L is very small
B) R is very small, L is large
C) Both R and L are large
D) Both R and L are very small.

Q.54 A force 2i + j has moved its point of application from (2,3) to (6,5). What is work done?

A) -10.
B) +10
C) -18.
D) +18

Q.55 The escape velocity corresponds to __________ energy gained by body, which carries it to an infinite distance from the surface of earth.

A) Total
B) Potential
C) Initial kinetic
D) None of these

Q.56 The drag force decreases as the speed of an object moving through fluid __________

A) Increases
B) Decreases
C) Remains constant
D) Both B and C

Q.57 Light year is a measure of

A) Distance
B) Time
C) Intensity of light
D) Velocity

Q.58 A yellow light of wavelength 500 mm emitted by a single source passes through two narrow slits 1 mm apart. How far apart are two adjacent bright fringes when interference is observed on a screen 10 m away?

A) 5 mm
B) 1.33 mm
C) 0.5 mm
D) 50 mm

Q.59 The heat produced by a current I in the wire of resistance R during time interval t is

A) I2/Rt
B) I2Rt.
C) I2/R/t.
D) IR2t.

Q.60 Which of the following is the most ductile?

A) Glass
B) Copper
C) Cast iron
D) High carbon steel

Q.61 Which type of bonding is present in NH4Cl?

A) Ionic
B) Covalent
C) Coordinate covalent
D) All of these

Q.62 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) Oxygen

Q.63 Aldehydes can be synthesized by the oxidation of

A) Primary alcohols
B) Secondary alcohols
C) Organic acids
D) Inorganic acids.

Q.64 The products of the fermentation of a sugar are ethanol and

A) Water
B) Oxygen
C) Carbon dioxide.
D) Sulfur dioxide

Q.65 __________ serve as carriers of heredity from one generation to the other.

A) Lipids
B) Caseins
C) Formaldehydes
D) Nucleoproteins

Q.66 __________ extraction is controlled by partition law.

A) Iodine
B) Benzoic acid
C) Solvent
D) Stationery

Q.67 The process of effusion is best understood by __________ law.

A) Graham’s
B) Charles’s
C) Boyle’s
D) None of these.

Q.68 __________ has dipole moment.

A) CO.
B) CO2
C) Benzene
D) All of these

Q.69 __________ is used as catalyst in Haber’s process for NH3 gas manufacture.

A) Iron
B) Carbon
C) Copper
D) Silver

Q.70 In many of its properties __________ is quite different from the other alkali metals.

A) Li
B) Be
C) Na
D) K.

Q.71 Which element forms long chains alternating with oxygen?

A) Carbon
B) Silicon.
C) Nitrogen
D) All of these

Q.72 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) 1.6-2.00

Q.73 Name the rare halogen among the following.

A) F
B) Cl
C) I
D) At

Q.74 Which bond will break when electrophile attacks an alcohol?

A) O – H
B) C – O
C) Both A and B
D) None of these

Q.75 The extent of un-saturation in a fat is expressed as its

A) Acid number
B) Iodine number
C) Saponification number
D) None of these

Q.76 The process of filtration is used to separate __________ particles from liquids.

A) Radial
B) Angular
C) Insoluble.
D) Soluble.

Q.77 London forces are very significant in __________

A) Sulphur
B) Phosphorous
C) Argon
D) Sugar

Q.78 Which of the following formation is endothermic reaction?

A) 2H2(g) + O2(g)——-> 2H2O(l)
B) C(s) + O2(g) —->CO2(g).
C) N2(g) + O2(g) —–.>N2O2(g)
D) None of these.

Q.79 Name the partially miscible liquids from the following?

A) Alcohol-ether
B) Nicotine-water
C) Benzene-water
D) Both A and B

Q.80 AlI3 (Aluminium Iodide) is electrically a __________

A) Conductor
B) Non-conductor
C) Semiconductor
D) None of these

Q.81 The elements of IIIA to VIIIA subgroups except He are known as __________ block elements.

A) q
B) s
C) p
D) None of these

Q.82 Concentrated nitric acid gives __________ when it reacts with tin.

A) Nitric oxide
B) Meta stannic acid
C) Ammonium nitrite
D) None of these

Q.83 Sulphuric acid is used to manufacture

A) HCl and HNO3
B) H3PO4
C) Both A and B.
D) Both HCl and 2COOH

Q.84 Alkanes containing __________ carbon atoms are waxy solids.

A) up to 4
B) 5 to 17
C) 18 or more
D) None of these

Q.85 Which of the following is used to make chloral hydrate?

A) Acetaldehyde
B) Formaldehyde
C) None of these
D) Both A and B.

Q.86 Ten moles of hydrogen are allowed to react with 6 moles of oxygen. How much water will be obtained from reaction on complete consumption of one gas?

A) 10 moles
B) 8 moles
C) 6 moles
D) 4 moles.

Q.87 The highest temperature a substance can exist as __________ is called its critical temperature.

A) Solid.
B) Liquid
C) Gas
D) Isotope

Q.88 __________ hybridization leads to a regular tetrahedral structure.

A) sp3
B) sp2
C) sp.
D) All of these.

Q.89 Osmotic pressure of a solution is __________ property.

A) Obligative
B) Fractional
C) Colligative
D) Automated

Q.90 Magnesium reacts with hydrogen at high pressure in the presence of catalyst __________forming magnesium hydride.

A) Dolomite
B) MgI2
C) Mg3N2
D) Epsom salt

Q.91 Which element has the largest number of allotropic forms?

A) Phosphorous
B) Sulphur
C) Oxygen
D) Both A & C

Q.92 With increase in number of unpaired electrons, paramagnetism:

A) Increases
B) Decreases
C) Remains constant.
D) Decreases then increases

Q.93 Which metal is commonly used to remove air bubbles from molten metals?

A) Aluminium
B) Copper
C) Sodium
D) Calcium

Q.94 Which of the following bonds has minimum bond energy?

A) C – F
B) C – Cl
C) C – I
D) C – Br

Q.95 Which of the following does not react with water?

A) Li
B) Na
C) Mg
D) Be

Q.96 Al2O3(SiO2).2H2O is called

A) Clay
B) Talc.
C) Asbestos.
D) None of these.

Q.97 CaO forms fertilize slag by reacting with

A) P2O5
B) Fe2O3
C) Silica.
D) FO

Q.98 __________ is colorless volatile liquid at room temperature.

A) HCl
B) HF
C) HI
D) HBr

Q.99 Hydrogen passed through phenol at 150 ºC in the presence of __________ catalyst gives cyclohexanol.

A) Tin
B) Nickel
C) Iron.
D) Sodium

Q.100 Ethanol-water is __________ mixture.

A) Azeotropic
B) Ideal
C) Benedict’s
D) Aliphatic

Q.101 The mobile phase in paper chromatography is usually

A) An organic liquid
B) Sulphuric acid
C) Water
D) Silver nitrate

Q.102 The amount of heat absorbed by one mole of solid at 1 atm when it melts into liquid form is denoted by __________

A) ∆ Hv
B) ∆ Hf
C) ∆ Hi
D) ∆ Hs

Q.103 In synthetic fibres __________ bonding is responsible for tensile strength.

A) Nitrogen
B) Hydrogen
C) Oxygen
D) None of these

Q.104 Boiling point of HF is __________ H2O.

A) Lower than
B) Higher than
C) Equal to
D) Almost same as

Q.105 __________ is necessary for development of leaves and it tends to accumulate in leaves and bark.

A) NO2
B) Calcium
C) Gypsum
D) Nitrogen

Q.106 Which of the following is pale yellow to reddish yellow in color?

A) Pb2O
B) PbO2
C) PbO
D) 2PbCO3.Pb(OH)2.

Q.107 In which of the following carbon is double bonded with itself?

A) Alkane
B) Ether
C) Alkene
D) Alkyne

Q.108 In this process, higher hydrocarbons can be cracked at lower temperature and lower pressure.

A) Thermal cracking
B) Catalytic cracking
C) Steam cracking
D) Reforming.

Q.109 Acetic acid is called __________ acid.

A) Methanoic
B) Propanoic
C) Ethanoic
D) Butanoic

Q.110 Na may be denoted by __________ electron configuration notation

A) 1s2 2s1
B) [Ar] 4s1
C) [Ne] 3s1
D) None of these.

Q.111 Which is the best drying agent in desiccators?

A) KOH
B) Gypsum
C) CaCl2
D) Silica sand.

Q.112 100 m3 of a gas at 3 atm pressure and 27 oC is transferred to a chamber of 300 m3 volume maintained at a temperature of 327 oC. What will be the pressure in chamber?

A) 6 atm
B) 4 atm
C) 2 atm
D) 1 atm

Q.113 The crystals of __________ are ionic solids.

A) Sugar
B) Iron
C) Diamond
D) NaCl

Q.114 Which material possesses the highest pH?

A) Soft drinks
B) Bananas
C) Milk of magnesia
D) Sea water

Q.115 The electron present in a particular orbit __________ energy.

A) Releases
B) Does not radiate
C) Absorbs.
D) None of these

Q.116 Al2F2SiO4 is named as

A) Gibbsite
B) Emerald
C) Bauxite
D) Cryolite

Q.117 Name the oxide in which N has the highest oxidation number.

A) Nitrous oxide
B) Nitric oxide
. C) Nitrogen peroxide
D) Nitrous anhydride

Q.118 Sulphur has oxidation state of __________

A) ± 2
B) + 4 and +6.
C) None of these.
D) Both A and B.

Q.119 CH3-O-CH3 is example of __________ isomerism.

A) Metamerism
B) Functional group
C) Chain
D) Position

Q.120 __________ are product of reaction of an alcohol and aromatic bi-functional acids.

A) Acrylic resins
B) Polyester resins
C) PVCs
D) Polyamide resins.

Q.121 He was __________ of all valuable possessions.

A) Robbed
B) Stolen
C) Pinched
D) Established

Q.122 The presence of armed guards ____________ us from doing anything disruptive.

A) Defeated
B) Excited
C) Irritated
D) Prevented

Q.123 Our flight was __________ from Lahore to Islamabad airport.

A) Diverted
B) Reflected
C) Deflected
D) Shifted.

Q.124 I am __________ forward to our picnic scheduled in next month.

A) Looking
B) Planning
C) Seeing.
D) Going.

Q.125 They did not guess how closely he had kept in touch with across the road

did not
how closely
had kept
with across

Q.126 He proved that if only germs were excluded of wounds, inflammation was averted.

that if
germs were
of wounds
inflammation was

Q.127 The man felt his hair flutter and the tissues of his body drew tight as if he were standing at the centre of a vacuum.

his hair flutter
body drew
were standing
of a vacuum.

Q.128 He came to the hurdles that he remember, over which once he had so easy a victory.

came to the hurdles
that he remember
over which once
so easy

Q.129 What is meant by birth-rate and death-rate and how do they effect the population?

is meant
and death-rate
how do
effect the population?

Q.130 She had left him with a calmness and a poise that accord well with his own inward emotions.

had left
calmness and a poise
that accord
own inward

In each of the following question, four alternative sentences are given.
Choose the CORRECT one and fill the Circle corresponding to that letter in the
MCQ Response Form

A) He lacked both the training and the equipment needed in the job.
B) He lacked both the training and the equipment needed by the job.
C) He lacked both the training and the equipment needed on the job.
D) He lacked both the training and the equipment needed for the job.

In each of the following question, four alternative sentences are given.

Choose the CORRECT one and fill the Circle corresponding to that letter in the MCQ Response Form.

A) They tried to pacify him for kindness and affection.
B) They tried to pacify him in kindness and affection
C) They tried to pacify him by kindness and affection.
D) They tried to pacify him with kindness and affection.

In each of the following question, four alternative sentences are given.

Choose the CORRECT one and fill the Circle corresponding to that letter in the MCQ Response Form.

A) Then he sat down in corner and remained queit
B) Then he sat down in corner and remained quite
C) Then he sat down in corner and remain quiet.
D) Then he sat down in corner and remained quiet.

In each of the following question, four alternative sentences are given.

Choose the CORRECT one and fill the Circle corresponding to that letter in the MCQ Response Form.

A) He was drenched with the hotness of his fear
B) He was drenched in the hotness of his fear
C) He was drenched by the hotness of his fear.
D) He was drenched off the hotness of his fear.

In each of the following question, four alternative sentences are given.
Choose the CORRECT one and fill the Circle corresponding to that letter in the
MCQ Response Form

A) Why did you disagree with me?
B) Why did you disagree to me?
C) Why did you disagree on me?
D) Why did you disagree by me?