Which one of the following is an example of chemical change?
Plants contain a variety of sterols like stigmasterol, ergosterol, sitosterol etc., Which very closely resemble cholesterol. These plant sterols are referred as:
In artificial insemination (AI) process, which of the following is/are introduced into the uterus of the female?
Which one of the following vitamins has a role in blood clotting?
Glucose is a source of energy. Which one of the following types of molecule is Glucose?
The living content of cell is called protoplasm. It is composed of:
Which one of the following pairs of vitamin and diseases is/are correctly matched?
Select the correct answer using the code given below:
A myopic person has a power of -1.25 Dioptre. What is the focal length and nature of his lens?
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):
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?
Two system are said to be in thermal equilibrium if and only if:
The mass number of an atom is determined by
Which of the following pairs represents isoelectronic ions
Which one among the following contains the most neutrons?
Two atoms are said to be isotopes if
The number of aluminium ions present in 54 g of aluminium (atomic weight 27) is
Which one of the following is the correct electronic configuration of chlorine
Which one of the following processes explains the splitting of a beam of white light into its constituent colours?
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
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?
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?
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
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
During Short circuiting, the current flowing in the electrical circuit
A cyclotron accelerates particles of mass m and change q. The energy of particles emerging is proportional to
The electric field inside a perfectly conducting hollow object is
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
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)
Which one of the following circuit elements is an active component?
A fuse is used in the electric circuit to
A close bottle containing water at room temperature was taken to the Moon and then the lid is opened. The water will
Heat given to a body which raises its temperature by 1°C is known as
If the door of a running refrigerator in a closed room is kept open, what will be the net effect on the room?
Bernoulli's principle is based on which one among the following laws
Which of the following is not a result of surface tension?
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
A passenger in a moving train tosses a coin upward which falls behind him. It implies that the motion of the train is
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
A motor vehicle is moving on a circle with uniform speed. The net acceleration of the vehicle is