List of top Chemistry Questions asked in AIIMS

Which of the following molecule or ions is a bidentate ligand?
Which of the following statements is not true about alcohols?
The $pH$ value of decinormal solution of $NH_4OH$ which is $20\%$ ionised is
The $pH$ of aqueous solution of ammonium formate is $\left( p K_{a}\right.$ of $HCOOH =3.8$ and $pK _{b}$ of $\left.NH _{3}=4.8\right)$
The composition of carnallite is
Rate determining step in nitration of benzene is
$dsp^2$ hybridisation is found in
Crystalline solids have
Correct equation of Freundlich isotherm is
Water is used as a moderator in nuclear reactor. Moderator is a light substance that absorb neutrons.
o-Nitrophenol is more volatile than p-nitrophenol Intramolecular hydrogen bonding is present in o-nitrophenol while intermolecular H bonding is in p-nitrophenol.
Smallest internuclear distance is found in
Which of the following hydrogen halides is most basic?
Strongest acid among the following is
Given that $C+O_{2} \rightarrow C O_{2} ; \Delta H^{\circ} = -a\,kJ$. $2 CO + O _{2} \rightarrow 2 CO _{2} ; \Delta H ^{\circ}=- b \,kJ$ The heat of formation of $CO$ is
A solid $AB$ has $NaCl$ type structure. The radius of $A^+$ is $100\, pm$. What is the radius of $B^-$ ?
A certain aqueous solution of $FeCl _{3}$ [formula mass $=162]$ has a density of $1.1 g / mL$ and contains $20.0 \% FeCl _{3} .$ Molar concentration of this solution is
$0.1\, M$ solution of glucose has same increment in the freezing point than $0.1\, M$ solution of urea. $K_f$ for both has same value.
$12\, g$ of an alkaline earth metal gives $14.8\, gm$ of its nitride. Atomic weight of the metal is

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R

Assertion (A) : \(Pb ^{4+}\) can be reduced easily to \(Pb ^{2+}\).

Reason (R) : \(Pb^{2+}\) is paramagnetic

In the light of the above statements, choose the correct answer from the options given below

Philosopher�s wool when heated with $BaO$ at $1100^{\circ}C$ gives a compound. Identify the compound.
Nitrogen and oxygen exist as diatomic but their cogeners are $P _{4}$ and $S _{8}$ respectively. This is due to
Which has lowest thermal stability?
The unit in which the solubility product of barium phosphate is expressed as
The pH value of $0.1\, M\, NaOH$ solution is (when there is a given reaction $\left.\left[ H ^{+}\right]\left[ OH ^{-}\right]=10^{-14}\right)$