List of top Chemistry Questions asked in AIIMS

$HClO_4$ is a stronger acid than $HClO_3$. Oxidation state of chlorine in $HClO_4$ is $+7$ and in $HClO_3$ is $+5$.
Aqueous gold colloidal solution is red in colour. The colour arises due to scattering of light by colloidal gold particles.
All $F - S - F$ angle in $SF_4$ is greater than $90^{\circ}$ but less than $180^{\circ}$. The lone pair-bond pair repulsion is weaker than bond pair-bond pair repulsion.
Which of the following is a biodegradable polymer?
Among the following, the most reactive towards alcoholic $KOH$ is :
Which of the following does not have optical isomer?
The major products formed by heating $C_6H_5CH_2OCH_3$ with $HI$ are $C_6H_5CH_2I \, and \, CH_ 3OH. $ Benzyl cation is more stable than methyl cation
Isobutanal does not give iodoform tests. It does not have $\alpha$-hydrogen
Which one of the following forms with an excess of $CN^-$ (cyanide) a complex having coordination number two?
The $ONO$ angle is maximum in
Maltose is a reducing sugar which gives two moles of D-glucose on hydrolysis Maltose has a$ 1,4-\beta$-glycosidic link-age
Which of the following is only acidic in nature?
Shape of $O_2F_2$ is similar to that of
Which of the following is not considered as an organometallic compound ?
The mixture of concentrated $HCl$ and $HNO _{3}$ made in $3: 1$ ratio contains
The most reactive nucleophile among the following is
Which one of the following is not a buffer solution?

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

Assertion (A) : Trans-2-butene on reaction with \(Br _{2}\) gives meso-2,3-dibromobutane.

Reason (R) : The reaction involves \(syn-addition\) of bromine.

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

The ligand called p acid is
Which of the following is not a surfactant ?
What is the co-ordination number of sodium in $Na_2O$ ?
The ortholpara directing group among the following is
One gram sample of $NH _{4} NO _{3}$ is decomposed in a bomb calorimeter. The temperature of the calorimeter increases by $6.12\, K$. The heat capacity of the system is $1.23\, kJ / g / deg$. What is the molar heat of decomposition for $NH _{4} NO _{3}$ ?
IUPAC name of
Intermolecular hydrogen bonding is strongest in