List of top Questions asked in AIIMS

India is one of the twelve megadiversity countries with ____ of genetic resources of the world.
In the preparation of $ HNO_{3}$ we get $NO$ gas by catalytic oxidaton of ammonia. The moles of $NO$ produced by the oxidation of two moles of $NH_{3}$ will be
In $BF_3$, the $B??F$ bond length is $1.30\, ??, when $BF_3$ is allowed to be treated with $Me_3N$, it forms an adduct, $Me_3N \to BF_3$, the bond length of $B ??F$ in the adduct is
In an intrinsic semiconductor band gap is $1.2\, eV$ then ratio of number of charge carriers at $600\, K$ and $300\, K$ is
In a solid, atom $M$ occupies $ccp$ lattice and $1/3^{rd}$ of tetrahedral voids are occupied by atom $N$. Find the formula of solid formed by $M$ and $N$.
$ { ->[{(HI (excess)}][{\Delta}] }$
Hair cream is
Genetically modified (GM) crops can be produced by
Electrode potential of hydrogen electrode is $18\, mV,$ then $[H^+]$ is
The highest oxidation state of $ Os$ is $+ 8$. Osmium is a $5$ $d$-block element.
The de-Broglie wavelength equation has significance for any microscopic and submicroscopic particles. de-Broglie wavelength is inversely proportional to the mass of the object its velocity is constant.
Small intestine is the principal organ for absorption of nutrients. Absorption of water, simple sugars and alcohol etc. takes place in small intestine.
Resolving power of a telescope depends only on wavelength. This is proportional to square of wavelength.
Protostele is the simplest stele. Protostele is the most advanced type of stele.
Phenol forms $2,4, 6$-tribromophenol on treatment with $Br_{2}$ in carbon disulphide at $273 \,K$. Bromine polarises in carbon disulphide.
Periodic abstinence is a natural method where couples abstain from coitus Coitus from day 5-10 should be avoided because this is the time of ovulation.
On adding zinc pieces to aqueous $FeCl_{3}$ solution, colour changes from deep yellow to light green. Aqueous $FeCl_{3}$ is acidic and on adding $Zn$, nascent hydrogen is produced which reduces deep yellow $FeCl_{3}$ solution to light green $FeCl_{2}$solution.
Number of radial and angular nodes for $3p$-orbital are 1, 1 respectively. Number of radial and angular nodes depends only on principal quantum number.
Meiosis II is similar to mitosis. Meiosis I cannot occur in haploid cells.
If optical density of a substance is more than that of water then the mass density of substance can be less than water. Optical density and mass density are not related.
Heat from the sun reaches the earth by convection. Air can be heated only by convection.
Gram negative bacteria do not retain the stain when washed with alcohol. The outer membrane of Gram negative$ (-ve)$ bacteria contain lipopolysaccharides, a part of which is integrated into membrane lipid.
Formic acid reduces Tollen?? reagent. Compounds containing $??HO$ group reduce Tollen?? reagent.
Electrons move from a region of higher potential to a region of lower potential. An electron has less potential energy at a point where potential is higher and vice-versa.
Cu is stronger reducing agent than $H_2$. E$^{\circ}$ of $Cu^{2+}/Cu$ is negative.