List of top Questions asked in AIIMS

Primary source of allelic variation is

For sky wave propagation of $10\, MHz$ signal, what should be the minimum electron density in ionosphere?

Double fertilisation involves

Dimension of electrical resistance is

Based on cellular mechanisms there are two major types of regeneration found in the animals. Which one of the following is the correct example of the type mentioned?

The clouds in sky generally appear to be whitish. Diffraction due to clouds is efficient in equal measure at all wavelengths.

Specific gravity of a fluid is a dimensionless quantity. It is the ratio of density of fluid to the density of water.

$SiF_6^{2-}$ is known but $SiCl_6^{2-}$ is not. Size of fluorine is small and its lone pair of electrons interacts with d-orbitals of $Si$ strongly.

Reaction of $SO_2$ and $H_2S$ in the presence of $Fe_2O_3$ catalyst gives elemental sulphur. $SO_2$ is a reducing agent.

Rates of nitration of benzene and hexadeuterobenzene are different. $C - H$ bond is stronger than $C - D$ bond.

Ozone is a powerful oxidising agent in comparison to $O_2$ . Ozone is diamagnetic but $O_2$ is paramagnetic.

In humans, the gamete contributed by the male determines whether the child produced will be male or female. Sex in humans is a polygenic trait depending upon a cumulative effect of some genes on $X$-chromosome and some on $Y$-chromosome.

First ionisation energy for nitrogen is lower than oxygen. Across a period effective nuclear charge decreases.

Cyclopentadienyl anion is much more stable than allyl anion. Cyclopentadienyl anion is aromatic in character.

Three of the following statements regarding cell organelles are correct while one is wrong. Which one is wrong?

The family containing mustard and its main characters are

Which one of the following four secretions is correctly matched with its source, target and nature of action?

Given below is a pedigree chart showing the inheritance of a certain sex-linked trait in humans. The trait traced in the above pedigree chart is

A young drug addict used to show symptoms of depressed brain activity, feeling of calmness, relaxation and drowsiness. Possibly he was taking

In which one of the following would you expect to find glyoxysomes ?

Grain colour in wheat is determined by three pairs of polygenes. Following the cross AABBCC (dark colour) x aabbcc (light colour), in $F_2$ generation what proportion of the progeny is likely to resemble either parent?

A solid sphere is rolling on a frictionless surface, shown in figure with a translational velocity $v\, m/s$. If it is to climb the inclined surface then $v$ should be

$C-DNA$ probes are copied from the messenger RNA molecules with the help of

A magnet is made to oscillate with a particular frequency, passing through a coil as shown in figure. The time variation of the magnitude of e.m.f. generated across the coil during one cycle is

A ladder is leaned against a smooth wall and it is allowed to slip on a frictionless floor. Which figure represents trace of its centre of mass.