List of top Questions asked in AIIMS

Beryllium and aluminium exhibit many properties which are similar. But the two elements differ in

Below are listed some pairs of characters. The homologous pair is

Two balls of different masses are thrown vertically upward with same speed. They will pass through their point of projection in the downward direction with the same speed. The maximum height and downward velocity attained at the point of projection are independent of the mass of the ball.

X-ray astronomy is possible only from satellites orbiting the earth. Efficiency of X-rays telescope is large as compared to any other telescope.

The apparent weight of a body in an elevator moving with some downward acceleration is less than the actual weight of a body. The part of the weight is spent in producing downward acceleration, when body is in elevator.

In javelin throw, the athlete throws the projectile at an angle slightly more than 45$^{\circ}$. The maximum range does not depend upon angle of projection.

The fundamental frequency of an open organ pipe increases as the temperature is increased. As the temperature increases, the velocity of sound increases more rapidly than length of the pipe.

The change in kinetic energy of a particle is equal to the work done on it by the net force. Change in kinetic energy of particle is equal to the work done only in case of a system of one particle.

$S _{ N } 1$ reaction is basically a solvolysis reaction. Polar protic solvents help the substrate to ionise and by the way get involved in $S _{ N } 1$ reaction.

Open circulatory system is found in most arthropods. Arthropods contain haemolymph which directly bathes internal tissues and organs.

: Noble gases have positive electron affinity. : Noble gases have stable closed shell electronic configuration.

In cockroach respiratory gases directly comes in contact with the various organs of the body. Cockroaches do not have respiratory pigment.

Helium has the highest value of ionisation energy among all the elements known. Helium has the highest value of electron affinity among all the elements known.

Glycine, an amino acid, comes under the category of non-essential amino acids. The fact behind it is that glycine cannot be synthesized in the body.

DNA fingerprinting involves identifying differences in specific regions in DNA sequence. DNA fingerprinting is the basis of paternity testing.

Conductivity of silicon increases by doping it with group-15 elements. Doping means introduction of small amount of impurities like $P, As$ or $Bi$ into the pure crystal.

: Chlorine when solidifies does not have zero entropy even at absolute zero. : Chlorine is a pungent smelling gas and it is difficult to solidify it.

: Calcium carbide on hydrolysis gives ethylene. : Calcium carbide contains $C^{4-}$ anions.

Bond energy and bond dissociation energy have identical value for diatomic molecules. Greater the bond dissociation energy, less reactive is the bond.

Benzene on heating with conc. $H_2SO_4$ gives benzenesulphonic acid which when heated with superheated steam under pressure gives benzene. Sulphonation is a reversible process.

Auditory ossicles are small bones present in the cavity of inner ear. Auditory ossicles maintain the balance of air pressure between two sides of ear drum.

Adrenaline is called an emergency hormone. It acts on the cells of skeletal, cardiac, smooth muscles, blood vessels and fat cells.

A primary amine has higher boiling point than any tertiary amine. A tertiary amine has greater number of $N - H$ bonds for $H$-bonding.

Holandric genes are located

$pBR _{322}$, which is frequently used as a vector for cloning gene in $E$. coli is a/an