List of top Questions asked in AIIMS

What is common between chloroplasts, chromoplasts and leucoplasts?
Two heater wires, made of the same material and having the same length and the same radius, are first connected in series and then in parallel to a constant potential difference. If the rates of heat produced in the two cases are $H_s$ and $H_p$ respectively, then $H_s /H_p$ will be
Three point charges $+q,-2 q$ and $+q$ are placed at points $(x=0, y=a, z=0),(x=0, y=0, z=0)$ and $(x=a, y=0, z=0)$, respectively. The magnitude and direction of the electric dipole moment vector of this charge assembly are
The magnifying power of a compound microscope increase with
The flame colours of metal ions are due to
During the life-cycle, Fasciola hepatica (liver fluke) infects its intermediate host and primary host at the following larval stage respectively
When the velocity of projection of a body is made $n$ times, its time of flight becomes $n$ times. Range of projectile does not depend on the initial velocity of a body.
Tropylium cation is aromatic in nature.
The only property that determines its aromatic behaviour is its planar structure.
The magnetic field produced by a current carrying solenoid is independent of its length and cross-sectional area. The magnetic field inside the solenoid is uniform.
The colour of the green flower seen through red glass appears to be dark. Red glass transmits only red light.
: The alternating current lags behind the e.m.f. by a phase angle of $\pi / 2$, when AC flows through an inductor. : The inductive reactance increases as the frequency of $A C$ source decreases.
Replication and transcription occur in the nucleus but translation occurs in the cytoplasm. m RNA is transferred from the nucleus into the cytoplasm where ribosomes and amino acids are available for protein synthesis.
Nuclear endosperm is formed by subsequent nuclear division without wall formation. Coconut is an example of such endosperm, where the endosperm remains nuclear throughout the development of the fruit.
Maize is an albuminous seed. Endosperm is completely absorbed by its growing embryo.
Interferons are a type of antibodies produced by body cells infected by bacteria. Interferons stimulate inflammation at the site of injury.
In collateral vascular bundles, phloem is situated towards inner side. In monocot stem, cambium is present.
F particles are present in the inner mitochondrial membrane. An electron gradient formed on the inner mitochondrial membrane, forms ATP
Colloidal solutions are stable but colloidal particles do not settle down. Brownian movement counters the force of gravity actively on colloidal particles.
Ciliated epithelium is present in the inner lining of trachea and large bronchi. Ciliary movement propel the mucus and foreign particle towards the larynx.
Bleaching powder reacts with dilute acids to evolve chlorine. The chlorine liberated by the action of dilute acids on bleaching powder is called available chlorine.
An electric motor will have maximum efficiency when back emf becomes equal to half of applied emf. Efficiency of electric motor depends only on magnitude of back emf.
An object $5\, cm$ tall is placed $1\, m$ from a concave spherical mirror which has a radius of curvature of $20 \,cm$. The size of the image is
Which one of the following is a matching pair of a drug and its category?
A baby has been born with a small tail. It is the case exhibiting
The great barrier reef along the east coast of Australia can be categorized as