Physics MCQs:

1)    The restoring force which opposes the applied force is given by

a)     F=K x

b)    F = -kx

c)     F= K x²

d)    None of these

2)    The ratio of applied force to the displacement gives

a)     Acceleration

b)    Spring constant

c)     Decay constant

d)    Planck constant

3)    The units of spring constant k are

a)     Joule-sec

b)    Meter sce^-2

c)     Meters

d)    Newton meter^-1

1.b

2.b

3.d

Questions about Arithmetic

A 1:

If the sum of 3 consecutive integers is less than 75, what is the greatest possible value of the smallest of the three integers?

A 2:

If 2<x<4 and 3<y<7, what is the largest integer value of x+y?

A 3:

What is the smallest number that is divisible by both 34 and 35?

Answer  1:

Let the numbers be: n, n+1 , n+2. Then

n+ (n+1)+(n+2)+(n+3)=3n+3

Now by the given condition:

3n+3<75⇒3n<72⇒n<24

The most n can be is 23.

Now try three consecutive numbers whose sum is less than 75.

So, the numbers must be 23,24,25

Answer is 23.

Answer 2:

If x and y are integers, the largest value is 3+6=9. However, although x+y is to be an integer, neither x nor y must be. If x=3.8 and y=6.2, then x+y=10

So answer=10

Answer 3:

You are being asked for the LCM (least common multiple) of 34 and 35.

So the LCM of the numbers is 34×35=1190

Inorganic Chemistry Book 2

1.     In the halogens, the element which is found rarely is

a)     Fluorine

b)    Chlorine

c)     Astatine

d)    Iodine

2.     The progressive deepening of color from F₂ to I₂ is due to

a)     Valence electron

b)    Atomic number

c)     Molecular mass

d)    Electronegativity

3.     Vander Waal’s forces are stronger in

a)     Fluorine

b)    Chlorine

c)     Astatine

d)    Iodine

1.c

2.b

3.d

Physics MCQs:

1.     A dynamo converts

a)     Mechanical energy into electrical energy

b)    Electrical energy into mechanical energy

c)     Magnetic energy into mechanical energy

d)    Magnetic energy into electrical energy

2.     Which one of the following functions like a motor?

a)     Galvanometer

b)    Ammeter

c)     Voltmeter

d)    All of these

3.     A.C cannot be used for

a)     Producing heat

b)    Producing light

c)     Magnetize and electroplating

d)    All of these

1.A (means generator)

2.d

3.C(because fixed electrode)

Physics MCQs:

1)    Hertz is the unit of

a)     Frequency

b)    Time period

c)     Displacement

d)    Force

2)    One hertz is equal to

a)     1 sec

b)    1 vibration

c)     1 cycle

d)    1 vibration/sec

3)    Frequency f is related to time period T as

a)     f=T

b)    f=1/T

c)     f==2π/T

d)    f=T²

1.a

2.d

3.b

Organic Chemistry:

1.     If a polymer has mass 63000 and the molar mass of repeating unit is 63 what is its degree of polymerization is

a)     10³

b)    10²

c)     10⁵

d)    None of these

2.     Properties of polymeric material depends upon

a)     Chemical composition

b)    Structure of molecule

c)     Boiling point

d)    Both a and b

3.     Weather resistant paint are mostly terpolymer, which of the following is used as monomer

a)     Butyl acrylate

b)    Methacarylate

c)     Acrylic acid

d)    All of these

1.a

2.d

3.d

Organic Chemistry

1.     Which of the following is present in the strings of bees and wasps?

a)     Formic acid

b)    Citric acid

c)     Carbolic acid

d)    Formalin

2.     Acceptance of macro molecular hypothesis came about in 1920’s largely because of the efforts of

a)     Schrodinger

b)    Staudinger

c)     Wholer

d)    None

3.     Which of the following is a inorganic macromolecule

a)     Diamond

b)    Sand

c)     Polyamide

d)    Both a and b

1.b

2.b

3.d

Physics MCQs:

1)    A honey drop is falling through the air from a height. Its radius is r, the density of honey is d and the co-efficient of viscosity is η. The viscous force of it will be

a)        1/6πηv²

b)    6πηr/v

c)     6πη/vr

d)    6ππrv

2)    The frictional effect between different layers of moving fluid is called

a)     Density

b)    Force

c)     Viscosity

d)    Surface tension

3)     Velocity of air current is

a)     Greater on lower part of aero plane’s wing

b)    Lower on upper part of aero plane’s wing

c)     Greater on upper part of aero plane’s wing

d)    None of these

1.d

2.c

3.c

Physics MCQs:

1) Light  waves are

a)    Transverse waves

b)   Longitudinal waves

c)    Comperssional waves

d)   None of these

2) Wavelength of light, on the average, is given by

a)    10^-14m

b)   10^-10m

c)    10^-6m

d)   10^-4m

3) Which one of the following can act approximately as a source of monochromatic light

a)    Neon lamp

b)   Fluorescent tube

c)    Sodium lamp

d)   None of these

1.a

2.b

3.c

Important points Chapter 4 book 1

If an expression is true for all the values of the variables involved then it is called identity.

If an expression is true for some values of the variables then it is called equation.

2^nd degree equation is known as quadratic equation.

Roots of the equation will always satisfy the equation.

Graph of the quadratic equation is parabola.

Number of roots is equal to the degree of the equation.

If an equation has imaginary roots then its roots will be conjugate of each other.

Exponential equation→If variable is in power or exponent.

Reciprocal equation → If x is changed by 1/x then the result will remains the same.

Radical equation → an equation having the sign of square root.

Extraneous roots → roots which do not satisfy the original equation.

Organic Chemistry

1.     Oils and fats belong to the class of

a)     Alcohols

b)    Acids

c)     Hydrocarbons

d)    Esters

2.     Why is ethanoic acid a stronger acid in liquid ammonia than in aqueous solution?

a)     Ammonia is a stronger base than water

b)    Ammonium ethanoate is completely ionized in aqueous solution

c)     Ammonium ethanoate is stronger acidic in aqueous solution

d)    Liquid ammonia is a more polar solvent than water

3.     A compound X has all of the properties below. It is a liquid at 25⁰C. It mixes completely with water it reacts with aqueous sodium hydroxide. What could X be

a)     Ethanoic acid

b)    Ethanol

c)     Ethane

d)    Ethyl ethanoate

1.d

2.a

3.a

Physics MCQs:

1)    The time period of a pendulum is 4 second. Its frequency is

a)     4 Hertz

b)    2 Hertz

c)     0.25 Hertz

d)    0.06 Hertz

2)    The time period of second’s pendulum is

a)     1 sec

b)    2 sec

c)     3 sec

d)    30 sec

3)    The frequency of a second’s pendulum is

a)     2 Hertz

b)    1 Hertz

c)     0.5 Hertz

d)    50 Hertz

1.c

2.b

3.c

Physics MCQs:

1)    The rain drop felling from a certain height neither hit us nor make hole in the ground because they move with

a)     Constant acceleration

b)    Variable acceleration

c)     Variable speed

d)    Constant terminal velocity

2)    The property of light which does not change with the nature of medium is

a)    Frequency

b)   Amplitude

c)    Wavelength

d)   None of these

3)    The appearance of colors in the soap ( or oil) film results from

a)    Dispersion

b)   Interference

c)    Reflection

d)   Refraction

1.d

2.d

3.b

Physics MCQs:

1) A pulse on a string is inverted when it is reflected from

a)    A fixed end

b)   A free end

c)    Either of the ends

d)   None of these

2) The arrangement of visible colors in grating is given by

a)    VIBGYOR

b)   ROYGBIV

c)    VIBGOBY

d)   VIBYGOR

3) If the distant star is receding from us, the spectral line from such a star when examined on earth will show

a)    No shift in frequency

b)   A shift in frequency towards the red end

c)    A shift in frequency towards the violet end

d)   None of these

1.a

2.b

3.b