List of top Chemistry Questions asked in AIIMS

In the metallurgy of aluminium
On cooling, the brown colour of nitrogen dioxide disappears. On cooling, $ NO_{2}$ undergoes dimerisation resulting in the pairing of odd electrons of $NO_{2}$.
Which of the following statement is not true for hydrolysis of $XeF_6$ ?
Which one of the following pairs represents stereoisomerism?
Which of the following element has lowest melting point?
When trans-2-butene is reacted with Br then product formed is
What reagent is used in the Hinsberg test of amines?
Strength of $H_2O_2$ is $15.18\, g\, L^{-1}$, then it is equal to
Starch is a mixture of two components, a water soluble component amylose $(15-20\%)$ and a water insoluble component amylopectin $(80-85 \%)$. The aqueous solution of amylose gives a blue colour with iodine solution due to the formation of
Select the correct pair amongst the following.
Predict in which of the following entropy decreases.
$K_2Cr_2O_7$ in acidic medium converts into
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 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
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.
Phenol forms $2,4, 6$-tribromophenol on treatment with $Br_{2}$ in carbon disulphide at $273 \,K$. Bromine polarises in carbon disulphide.
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.
Formic acid reduces Tollen?? reagent. Compounds containing $??HO$ group reduce Tollen?? reagent.
Cu is stronger reducing agent than $H_2$. E$^{\circ}$ of $Cu^{2+}/Cu$ is negative.
Bond dissociation energy is $F_2 > Cl_2$. $Cl_2$ has more electronic repulsion than $F_2$.