Sample Paper 2010

PHYSICS


When a helium atom loses an electron it becomes:
An alpha particle.
Proton
A positive helium ion
A negative helium ion

Beta ray emitted by a radioactive substance is
An electron which was existing outside the nucleus.
An electron which was existing inside the nucleus .
An electron emitted by the nucleus as a result of the decay of neutron inside the nucleus.
A pulse of electromagnetic wave

An electric charge in uniform motion produces
An electric field.
A magnetic field
Both magnetic and electric fields.
Neither magnetic nor electric fields

What is emitted by a hot metal filament in cathode ray tube?
X-ray
Proton
Electron
Photon

If the mass of the bob of a pendulum is doubled its time period is
Halved
doubled
Unchanged
Increases four times

The centre of Newton rings is dark due to
Polarization
Destructive interference
Constructive interference
Reflection

Which one is most stable element on the basis of binding energy
Sn
Ba
Kr
Fe

Resistance in RC circuit of time constant 2 second in 1000 ohm. What is value of C in the circuit?
2 micro farad
20 micro farad
200 micro farad
2000 micro farad

The Lenz’s law refers to induced
Emf.
Resistance
Shear
Currents

In which of the following, out put is similar to NAND gate if input A=0 and input B=1.
NOR
XNOR
XOR.
Both b and c

For atomic hydrogen spectrum, which of the following series lies in visible region of electromagnetic spectrum?
Lyman series.
Paschen series.
Balmer series.
Bohr series

_______ are the particles that experience strong nuclear force
Electrons.
Muons.
Neutrinos.
Neutrons

The vertical velocity of ball thrown upward________ with time
Decreases linearly.
Remains constant.
Doubles
Decreases parabolic ally

The force required to bend the normally straight path of a particle into a circular path is called ___force
Traveling
Bending
Centrifugal
Centripetal

A disc at rest without slipping, rolls down a hill of height (3x9.8)m. what is its speed in m/sec when it reaches at the bottom?
11.4
19.6
22.8
9.8s

Tuning of the radio is the best example of electrical__
Resonance
Resistance
Current
None of these

A standing wave pattern is formed when the length of string is an integral multiple of ___wavelength
Triple
Full
Half
Double

Which of the following lights travels the fastest in optical fibers?
Visible light.
Invisible infra-red
Ultra-violet.
Ordinary light.

The algebraic sum of potential changes in a closed circuit is zero is Kirchhoff’s ___rule
First
Second
Third
None of these

In LED when an electron combines with a __during forward bias conduction, a photon of visible light is emitted
High voltage
Photon
Hole
Positron

For photons of energy greater than 1.02 MeV the probability of pair production occurrence_ as the energy increases.
Increase.
Completely diminishes
Reduces to half
Remains unchanged

The neutron is assumed to be made of
One up quark and two down quarks.
Two up quarks and two down quarks.
Two up quarks and one down quark
One up quark and one down quark

An_______ missile is called a ballistic missile
Un- powered and guided
Unguided and powered
Powered and guided
Un powered and unguided

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
Faster than.
Slower than
Equal to
None of these

The angular frequency of simple pendulum is directly proportional to
l
1/l
Square root l
Square root 1/l

Two waves of slightly different frequencies and traveling in same direction produce
Interference
Polarization
Stationary waves.
Beats

A single mode step index fiber has core of about_________ micro m diameter
50 to 1000
50
30
5

A 5 ohm resistor is indicated by a single ___color band around its body
Red
Green
Blue
Brown

Practically __current flows in a reverse biased pn junction
No.
Very large
Few mill amperes.
Both

Cesium coated oxidized silver emits electrons for _____light.
Infrared
Ultraviolet
Visible
Green

The cobalt is absorbed by
Bones
Skin
Liver
Thyroid gland

In a step down transformer the output current ____
Is reduced
Is increased
Remains same
None of these

Force in terms of base units is expressed as
Kg m/s2
Kg m2/s2
Kg m2/s3
None of these

100 joules work has been done by an agency in 10 seconds. What is power of agency?
1000 watt
100
10 watt
0.10 watt

The acceleration is proportional to the displacement and is directed towards mean position in ____motion
Gravity
Simple harmonic
Uniform
Projectile

In gases the speed of sound is inversely proportional to _____ of the density when other factors are same
Square root
Square
Third power
Third root

A watch maker uses___ to repair the watches
Telescope
Convex mirror
Convex lens
Concave lens

A 2m long pipe is open at both ends. What is second harmonic frequency?
42.5 Hz.
85 hz
220 Hz
None of these

A wire has resistance 100 ohm at 0 degree centigrade and 200 ohm at 100 degree centigrade. What is its temperature coefficient in K-1?
-0.01.
-1/273
0.01
1/273

The net magnetic field created by the electrons within an atom is due to the field created by their_ motion.
Orbital
Spin
Orbital and spin
Orbital x spin

At high temperature, the proportion of _____ wavelength radiation increase
AM radio
Long radio
Shorter
Both A and C

In photoelectric effect removal of photons is observed at________ energies.
Low
High
Intermediate
Both a and c

Which device is the most efficient?
Nuclear reactor
Storage battery
Silicon solar cell
Dry battery cell

The units of E in E = mc2 are
Kg m /s2
Kg m2/s-2
N m /s2
Both b and c

Work done on a body equals change in its__ energy
Total
Potential
Kinetic
All of these

A pipe varies uniformly in diameter from 2 m to 4m an incompressible fluid enters the pipe with velocity 16m/sec. what is velocity of fluid when it leaves the pipe?
64 m/sec
32 m/sec
8 m/sec
4 m/sec

Transverse waves can not be setup in
Metals
Solids
Fluids
Soil

The ratio of the ____ is called magnification.
Image size to object size
Object size to image size
Eyepiece size to object size
None of these

Which of the following has the highest resistivity?
Germanium
Silver
Copper
Platinum

An n type semi conductor is made by doping silicon crystal with_____
Indium
Aluminum
Arsenic
Both b and c

Objects can not be accelerated to the speed of light in free space is consequence of
Mass variation
Energy mass relationship
Inertia forces
All of these

A certain radioactive mass decays from 64 gm to 2 gm in 20 days. What is its half life?
5 days
4 days
10 days
6 days

If inductance is denoted by L and resistance by R, which of the following is true for a choke?
R is large , L is very small
R is very small, L is large
Both R and L are large
Both R and L are very small

A force 2i+j has moved its point of application from(2,3) to (6,5). What is work done?
-10
10
-18
18

The escape velocity corresponds to __ energy gained by body, which carries it to an infinite distance from the surface of earth.
Total
Potential
Initial kinetic
None of these

The drag force decreases as the speed of an object moving through fluid______
Increases
Decreases
Remains constant
Both b and c

Light year is a measure of
Distance
Time
Intensity of light
Velocity

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 interferenc3e is observed on a screen 10 m away?
5 mm
1.33 mm
0.5 mm
50 mm

The heat produced by a current I in the wire of resistance R during time interval t is
I2/Rt.
I2Rt
I2/R/t
IR2t.

Which of the following is the most ductile?
Glass.
Copper
Cast iron
High carbon steel

CHEMISTRY




Which type of bonding is present in NH4Cl
Ionic
Covalent
Coordinate covalent
All of these

When CuSO4 is electrolyzed in aqueous solution using copper electrodes, then the substance which deposits at the cathode is
Copper metal
Copper ions
Hydrogen
Oxygen

Aldehydes can be synthesized by the oxidation of
Primary alcohols
Secondary alcohols
Organic acids
Inorganic acids

The products of the fermentation of a sugar are ethanol and
Water
Oxygen
Carbon dioxide
Sulfur dioxide

______ serve as carriers of heredity from one generation to the other.
Lipids
Caeseins
Formaldehydes
Nucleoproteins

____ extraction is controlled by partition law
Iodine
Benzoic acid
Solvent
Stationery

The process of effusion is best understood by _ ____law
Graham’s
Charles’s
Boyle’s
None of these

__ has dipole moment
CO
CO2
Benzene
All of these

________ is used as catalyst in Haber’s process for NH3 gas manufacture.
Iron
Carbon
Copper
Silver

In many of its properties_________ is quite different from the other alkali metals
Li
Be
Na
K

Which element forms long chains alternating with oxygen?
Carbon
Silicon
Nitrogen
All of these

The percentage of carbon in medium carbon steel is
0.7-1.5
0.1-0.2
0.2-0.7
1.6-2.00

Name the rare halogen among the following
F
Cl
I
At

Which bond will break when electrophile attacks an alcohol?
O-H
C-O
Both a and b
None of these

The extent of un saturation in a fat is expressed as its
Acid number
Iodine number
Saponification number
None of these

The process of filtration is used to separate_______ particles from liquids.
Radial
Angular
Insoluble
Soluble

London forces are very significant in
Sulphur
Phosphorous
Argon
Sugar

Which of the following formations endothermic reaction?
2H2 + O2 --à 2H2O
C + O2------à CO2
N2 + O2 -------à N2O
None of these

Name the partially miscible liquids from the following ?
Alcohol-ether
Nicotine-water
Benz3ene-water
Both a and b

AlI3 is electrically a ________
Conductor
Non conductor
Semiconductor
None of these

The elements of IIIA to VIIIA subgroups except He are known as ___block elements
Q
S
P
None of these

Concentrated nitric acid gives _________ when it reacts with tin
Nitric oxide
Meta stannic acid
Ammonium nitrite
None of these

sulphuric acid is used to manufacture
HCl aond HNO3
H3PO4
Both a and b
Both HCl and 2COOH

Alkanes containing _____ carbon atoms are waxy solids
Upto 4
5 to 17
18  or more
None of these

Which of the following is used to make chloral hydrate?
Acetaldehyde
Formaldehyde
None of these
Both a and b

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?
10 moles
8 moles
6 moles
4 moles

The highest temperature a substance can exist as ___ is called its critical temperature
Solid
Liquid
Gas
Isotope

_______ hybridization leads to a regular tetrahedral structure
Sp3
Sp2
Sp
All of these

Osmotic pressure of a solution is __________property.
Obligative
Fractional
Colligative
Automated

Magnesium reacts with hydrogen at high pressure in the presence of catalyst_______ forming magnesium hydride.
Dolomite
MgI2
Mg3N2
Epsom salt

Which metal is commonly used to remove air bubbles from molten metals?
Aluminum
Copper
Sodium
Calcium

With increase in number of unpaired electrons, paramagnetism
Increases
Decreases
Remains
Decreases

Which element has the larges number of allotropic forms?
Phosphorous
Sulphur
Oxygen
Both a and c

Which of the following bonds has minimum bond energy?
C-F
C-Cl
C-l
C-Br

Which of the following does not react with water?
Li
Na
Mg
Be

Al2O3(SiO2).2H2O is called
Clay
Talc
Asbestos
None of these

CaO forms fertilize slag by reacting with
P2O5
Fe2O3
Silica
FeO

________is colorless volatile liquid at room temperature
HCl
HF
HI
HBr

Hydrogen passed through phenol at 150 degree centigrade in the presence of _______ catalyst gives cyclohexanol
Tin
Nickel
Iron
Sodium

Ethanol-water is _________mixture
Azeotropic
Ideal
Benedict’s
Aliphatic

The mobile phase in paper chromatography is usually
An organic liquid
Sulphuric acid
Water
Silver nitrate

The amount of heat absorbed by one mole of solid at 1 atm when it melts into liquid form is denoted by_________
Delta Hv
Delta Hf
Delta Hl
Delta Hs

In synthetic fibers_______ bonding is responsible for tensile strength.
Nitrogen
Hydrogen
Oxygen
None of these

Boiling point of HF is ____H2O
Lower than
Higher than
Equal to
Almost same as

_____is necessary for development of leaves and it tends to accumulate in leaves and barks
NO2
Calcium
Gypsum
Nitrogen

Which of the following is pale yellow to reddish yellow in color
Pb2O
PbO2
PbO
2PbCO2.Pb(OH)2

In which of the following carbon is double bonded with itselp?
Alkane
Ether
Alkene
Alkyne

In this process higher hydrocarbons can be cracked at lower temperature and lower pressure.
Thermal cracking
Catalytic cracking
Steam cracking
Reforming

Acetic acid is called ___acid
Methanoic
Propanoic
Ethanoic
Butanoic

Na may be denoted by ______________ electron configuration notation
1s2 2s1
[Ar] 4s1
[Ne] 3s1
None of these

Which is the best drying agent in desiccators?
KOH
Gypsum
CaCl2
Silica sand

100 m2 of a gas at 2 atm pressure and 27 degree centigrade is transferred to a chamber of 300 m3 volume maintained at a temperature of 327 degree centigrade.  What will be the pressure in chamber?
6 atm
4 atm
2 atm
1 atm

The crystals of ___ are ionic solids
Sugar
Iron
Diamond
NaCl

Which material possesses the highest pH?
Soft drinks
Bananas
Milk of Magnesia
Sea water

The electron present in a particular orbit___ energy
Releases
Does not radiate
Absorbes
None of these

Al2F2siO4 is named as
Gibbsite
Emerald
Bauxite
Cryolite

Name the oxide in which N has the highest oxidation number.
Nitrous oxide
Nitric oxide
Nitrogen peroxide
Nitrous anhydride

Sulphur has oxidation state of
+- w
+4 and +6
None of these
Both a and b

Ch3-O-CH3 is example of _______ isomerism
Metamerism
Functional group
Chain
Position

______ are product of reaction of an alcohol and aromatic bi-functional acids
Acrylic resins
Polyester resins
PVCs
Polyaride resins

ENGLISH




He wa ________ of all valuable possessions
Robbed
Stolen
Pinched
Established

The presence of armed guards _______ us from doing anything disruptive
Defeated
Excited
Irritated
Prevented

Our flight was __ from Lahore to Islamabad airport
Diverted
Reflected
Deflected
Shifted

I am __________ forward to our picnic scheduled in next month
Looking
Planning
Seeing
Going

A
A
A
A
A
A

He lacked both the training and the equipment needed in the job.
He lacked both the training and the equipment needed by the job
He lacked both the training and the equipment needed on the job
He lacked both the training and the equipment needed for the job


They tried to pacify him for kindness and affection
They tried to pacify him in kindness and affection
They tried ot pacify him by kindness and affection
They tried to pacify him with kindness and affection


Then he sat down in corner and remained queit
Then he sat down in corner and remained quite.
Then he sat down in corner and remain quiet.
Then he sat down in corner and remained quiet.


He was drenched with the hotness of his fear
He was drenched in the hotness of his fear
He was drenched by the hotness of his fear
He was drenched off the hotness of his fear.


Why did you disagree with me?
Why did you disagree to me?
Why did you disagree on me?
Why did you disagree by me?


Do not stuff you head by things you don not understand.
Don not stuff your head with things you don not understand
Do not stuff your head for things you do not understand
Do not stuff your head in things you do not understand


A day later he reached his first glimpse of Lahore
A day later he took his first glimpse of Lahore
A day later he found his first glimpse of Lahore
A day later he caught his first glimpse of Lahore


This will have a bad impact to the economy
This will have a bad impact on the economy
This will have a bad impact at the economy
This will have a bad impact over the economy


It would save him form dying of thirst
It would save him from dying form thirst.
It would save him from dying with thirst
It would save him from dying by thirst


All this flashed by his mind in a instant of protest
All this flashed on his mind in an instant of protest
All this flashed through his mind in an instant of protest
All this flashed by off mind in an instant of protest.

Vexing
Annoying
Aggressive
Viable
waxy

Vague
Respectful
Uncertain
Warlock
Snow white

Mangled
Dodged
Grained
Indisputable
Damaged

Prodigious
Productive
Enormous
Prudential
Waddle

Astounded
Shocked
Discarded
Assured
Attracted

Sagacity
Foolishness
Large city
Onions
Wisdom

Grim
Gratis
Restless
Severe
Grater

Indolently
Lazily
Indecently
Ideally
Gaily

Perish
Furious
Come to death
Secret
Frustrated

doze
dogged
diet
sleep
4.medicine to be taken