General Knowledge
Which one of the following is an example of chemical change
Which one of the following is an example of chemical change?
- Burning of paper
- Magnetization of soft iron
- dissolution of cane sugar in water
- Preparation of ice cubes from water
Plants contain a variety of sterols like stigmasterol, ergosterol, sitosterol
Plants contain a variety of sterols like stigmasterol, ergosterol, sitosterol etc., Which very closely resemble cholesterol. These plant sterols are referred as:
- Phytosterols
- Calciferols
- Ergocalciferols
- Lumisterols
In artificial insemination (AI) process, which of the following is introduced
In artificial insemination (AI) process, which of the following is/are introduced into the uterus of the female?
- Egg only
- Fertilized egg
- Sperm only
- Egg and sperm
Which one of the following vitamins has a role in blood clotting
Which one of the following vitamins has a role in blood clotting?
- Vitamin A
- Vitamin B
- Vitamin D
- Vitamin K
Glucose is a source of energy. Which one of the following types of molecule is Glucose
Glucose is a source of energy. Which one of the following types of molecule is Glucose?
- Carbohydrate
- Protein
- Fat
- Nucleic acid
The living content of cell is called protoplasm. It is composed of
The living content of cell is called protoplasm. It is composed of:
- Cytoplasm only
- Cytoplasm and nucleoplasm
- Nucleoplasm only
- Cytoplasm, nucleoplasm and other organelles
Which one of the following pairs of vitamin and diseases are correctly matched
Which one of the following pairs of vitamin and diseases is/are correctly matched?
- Vitamin A : Rickets
- Vitamin B1 : Beriberi
- Vitamin C : Scurvy
Select the correct answer using the code given below:
- 2 only
- 2 and 3 only
- 1 and 3 only
- 1, 2 and 3
A myopic person has a power of -1.25 Dioptre. What is the focal length
A myopic person has a power of -1.25 Dioptre. What is the focal length and nature of his lens?
- 50 cm and convex lens
- 80 cm and convex lens
- 50 cm and concave lens
- 80 cm and concave lens
A piece of ice, 100 g in mass is kept at 0°C. The amount of heat it requires to melt
A piece of ice, 100 g in mass is kept at 0°C. The amount of heat it requires to melt at 0°C is (take latent heat of melting of ice to be 333.6 J/g):
- 750.6 J
- 83.4 J
- 33360 J
- 3.336 J
A person rings a metallic bell near a strong concrete wall. He hears the echo after 0.3 s
A person rings a metallic bell near a strong concrete wall. He hears the echo after 0.3 s. If the sound moves with a speed of 340 m/s, how far is the wall from him?
- 102 m
- 11 m
- 51 m
- 30 m
The SI unit of mechanical power is
The SI unit of mechanical power is:
- Joule
- Watt
- Newton-second
- Joule-second
Two system are said to be in thermal equilibrium if and only if
Two system are said to be in thermal equilibrium if and only if:
- there can be a heat flow between them even are at different temperatures
- there cannot be a heat flow between them even if they are at different temperatures
- there is no heat flow between them
- their temperature are slightly different
The mass number of an atom is determined by
The mass number of an atom is determined by
- the number of protons only
- adding the number of neutrons and number of electrons
- adding the number of protons and number of electrons
- adding the number of neutrons and number of protons
Which of the following pairs represents isoelectronic ions
Which of the following pairs represents isoelectronic ions
- Mg2+, Ca2+
- Na+, K+
- K+, Mg2+
- Ca2+, S2-
Which one among the following contains the most neutrons
Which one among the following contains the most neutrons?
- 6129Cu
- 5926Fe
- 6030Zn2+
- 6130Zn
Two atoms are said to be isotopes if
Two atoms are said to be isotopes if
- they have the same atomic number but different mass numbers
- the sum of the number of protons and neutrons is the same, but the number of protons is different
- they have the same number of neutrons but different modes of radioactive decay
- they have the same number of neutrons but different mass numbers
The number of aluminium ions present in 54 g of aluminium
The number of aluminium ions present in 54 g of aluminium (atomic weight 27) is
- 2
- 18
- 1.2 x 1024
- 1.1 x 1024
Which one of the following is the correct electronic configuration of chlorine
Which one of the following is the correct electronic configuration of chlorine
- 2, 8, 8
- 2, 7, 8
- 7, 8, 2
- 2, 8, 7
The most of the mass of the atom can be found in
The most of the mass of the atom can be found in
- nucleus
- electron cloud
- charges
- electrons
The number of valence electrons in the O2- ion is
The number of valence electrons in the O2- ion is
- 4
- 6
- 8
- 10
How many grams of MgCO3 contain 24.00 g of oxygen
How many grams of MgCO3 contain 24.00 g of oxygen? (The molar mass of MgCO3 is 84.30 g mol–1)
- 42.15 g
- 84.30 g
- 126.00 g
- 154.00 g
Splitting of a beam of white light into its constituent colours
Which one of the following processes explains the splitting of a beam of white light into its constituent colours?
- Polarization
- Dispersion
- Diffraction
- Reflection
A real image
Consider the following statements:
A real image
- can be formed on a screen
- is always magnified and inverted
Which of the statements given above is/are correct
- 1 only
- 2 only
- Both 1 and 2
- Neither 1 nor 2
An optician prescribes a power = -0.5 dioptre
An optician prescribes a power = - 0.5 dioptre. The corresponding lens must be a
- convex lens of focal length 2 m
- concave lens of focal length 50 cm
- concave lens of focal length 2 m
- convex lens of focal length 50 cm
If the speed of light in air is 3 x 108 m/s, the speed of light in glass
If the speed of light in air is 3 x 108 m/s, the speed of light in glass (with refractive index 1.5) would be
- 4.5 x 108 m/s
- 1.5 x 108 m/s
- 2 x 108 m/s
- 3 x 108 m/s
While looking at the image formed by a convex lens
While looking at the image formed by a convex lens (one half of the lens is covered with black paper), which one of the following will happen to the image?
- Half of the image will be visible
- One can see an image of smaller size
- Intensity of the image will be diminished
- Image will be inverted
A sound wave has frequency of 2 kHz and wavelength of 35 cm
A sound wave has frequency of 2 kHz and wavelength of 35 cm. If an observer is 1.4 km away from the source, after what time interval could the observer hear the sound?
- 0.5 s
- 2 s
- 4 s
- 20 s
Ultrasonic waves of frequency are passed through a medium
Ultrasonic waves of frequency 3 × 105 Hz are passed through a medium where speed of sound is 10 times that in air (Speed of sound in air is 300 m/s). The wavelength of this wave in that medium will be of the order of
- 0.1 cm
- 1 cm
- 10 cm
- 100 cm
A current-carrying wire is known to produce magnetic lines of force
A current-carrying wire is known to produce magnetic lines of force around the conducting straight wire. The direction of the lines of force may be described by
- left-hand thumb rule for up-current and right-hand thumb rule for down current
- right-hand thumb rule for both up and down currents
- right-hand thumb rule for up-current and left-hand thumb rule for down current
- left-hand thumb rule for both up and down currents
During Short circuiting, the current flowing in the electrical circuit
During Short circuiting, the current flowing in the electrical circuit
- increases instantaneously
- reduces substantially
- varies continuously
- does not change
A cyclotron accelerates particles of mass m and change q
A cyclotron accelerates particles of mass m and change q. The energy of particles emerging is proportional to
- q/m2
- q2/m
- q2/m2
- q
The electric field inside a perfectly conducting hollow object is
The electric field inside a perfectly conducting hollow object is
- infinite
- 4π
- dependent upon the shape of the object
- zero
Van de graaff generator is used for
Van de graaff generator is used for
- generating large currents
- accelerating charged particles
- generating electric field
- generating high-frequency voltage
Two conducting wires A and B are made of same material
Two conducting wires A and B are made of same material. If the length of B is twice that of A and the radius of circular cross-section of A is twice that of B, then their resistances RA and RB are in the ratio
- 1 : 2
- 2 : 1
- 1 : 4
- 1 : 8
A force F, acting on an electric charge q, in presence of an electromagnetic field
A force F, acting on an electric charge q, in presence of an electromagnetic field, moves the charge parallel to the magnetic field with velocity v. Then F is equal to (where E and B are electric field and magnetic field respectively)
- q(v x B)
- q(v x E)
- qB
- qE
Which one of the following circuit elements is an active component
Which one of the following circuit elements is an active component?
- Transistor
- Capacitor
- Resistor
- Inductor
A fuse is used in the electric circuit to
A fuse is used in the electric circuit to
- break the circuit when power gets off
- complete the circuit for flow of current
- break the circuit when excessive current flows through the circuit
- indicate if the current is flowing uninterrupted
The Celsius temperature is
The Celsius temperature is a/an
- approximate temperature
- absolute temperature
- specific temperature
- relative temperature
A close bottle containing water at room temperature
A close bottle containing water at room temperature was taken to the Moon and then the lid is opened. The water will
- boil
- freeze
- not change at all
- decompose into oxygen and hydrogen
Heat given to a body which raises its temperature by
Heat given to a body which raises its temperature by 1°C is known as
- water equivalent
- specific heat
- temperature gradient
- thermal capacity
Bats can fly in dark because they
Bats can fly in dark because they
- have strong wings
- have sharp eyes
- produce ultrasonic waves
- are nocturnal
If the door of a running refrigerator in a closed room is kept open
If the door of a running refrigerator in a closed room is kept open, what will be the net effect on the room?
- It will make the temperature go up and down
- It will make no difference on the average
- It will heat the room
- It will cool the room
Bernoulli's principle is based on which one among the following laws
Bernoulli's principle is based on which one among the following laws
- Conservation of momentum
- Conservation of angular momentum
- Conservation of energy
- Conservation of mass
Which of the following is not a result of surface tension
Which of the following is not a result of surface tension?
- Flow of a liquid
- Capillary rise
- Nearly spherical drop of rain
- Removal of dirt by soap or detergent
If the motion of an object is represented by a straight line
If the motion of an object is represented by a straight line parallel to the time axis in a distance-time graph, then the object undergoes
- decelerated motion
- uniform non-zero velocity motion
- accelerated motion
- zero velocity motion
A force applied on a body is represented as
A force applied on a body is represented as
F = 6i - 8j + 10k
and accelerates is at 1 m/s2. The mass of the body is
- 10√2 kg
- 2√10 kg
- 8 kg
- 10 kg
A passenger in a moving train tosses a coin upward which falls behind him
A passenger in a moving train tosses a coin upward which falls behind him. It implies that the motion of the train is
- uniform
- retarded
- accelerated
- along the circular tracks
Two bodies A and B having masses m and 4m respectively
Two bodies A and B having masses m and 4m respectively are moving with equal linear momentum. The ratio of kinetic energies between A and B is
- 1 : 2
- 1 : 1
- 4 : 1
- 1 : 4
The dimension of impulse is the same as that of
The dimension of impulse is the same as that of
- pressure
- angular momentum
- linear momentum
- work
A motor vehicle is moving on a circle with uniform speed
A motor vehicle is moving on a circle with uniform speed. The net acceleration of the vehicle is
- perpendicular to the radius and along the velocity
- towards the centre of circle
- away from the centre along the radius of the circle
- zero
Page 1 of 3