List of top Chemistry Questions asked in AIIMS

$NaOH$ cannot be stored in a vessel made of aluminium or zinc. A protective layer of oxide is formed on the surface of the metal.

Monoclinic sulphur is an example of monoclinic crystal system. For a monoclinic system, $a\ne b\ne c$ and $\alpha=\gamma=90^{\circ}, \beta=90^{\circ}$.

Conductivity of all electrolytes decreases on dilution. On dilution number of ions per unit volume decreases.

Chloroform is stored in dark coloured bottles. Chronic chloroform exposure may cause damage to liver and kidneys.

$CaF _{2}$ has been given the name fluorspar. Solid $CaF _{2}$ emits light when heated.

Boron always forms covalent bond. The small size of $B ^{3+}$ favours formation of covalent bond.

$Al _{2} O _{3}$ is converted to aluminium by reduction with carbon. Carbon (graphite) has greater affinity for oxygen than $Al$.

An LPG cylinder, containing $15\, kg$ butane at $27^{\circ} C$ and $10\, atm$ pressure, is leaking. After one day, its pressure decreased to 8 atm. The quantity of gas leaked is

What is the structural formula of lithium tetrahydrido aluminate ?

Find the major product in the following reaction,

The stability of ferric ion is due to

Europium is

Which one amongst of the following isomerism is shown by $\left[ Pt \left( NH _{3}\right)_{2} Cl _{2}\right]$?

A forms $hcp$ lattice and B are occupying $1/3^{rd}$ of tetrahedral voids, then the formula of compound is

Which one of the following forms vortex ring?

$CaCN _{2}+ C$ is called on

All enzymes are made up of proteins and all proteins have three dimensional structures. Secondary structures of protein are sequence of amino acids.

Aniline does not undergo Friedel-Crafts reaction. Friedel-Crafts is an electrophilic substitution reaction.

Aniline does not undergo Friedel-Crafts reaction. Friedel-Crafts reaction is an electrophilic substitution reaction.

For an isolated system, q is zero. In an isolated system, change in U and V is zero.

Boiling point of benzene is $353.23\, K$. When $1.8\, g$ of non-volatile solute is dissolved in $90\, g$ of benzene. Then boiling point is raised to $354.11\, K$. Given $K_b$ (benzene) = $2.53 \, kg\, mol^{-1}$. The molecular mass of non-volatile substance is

The molar specific heats of an ideal gas at constant pressure and volume are denoted by $ C_P$ and $C_V$, respectively. If $\gamma = \frac{C_P}{ C_V} $ and $R$ is the universal gas constant, then $C_V$ is equal to :

Total number of antibonding electrons present in $O_2$ will be

Which of the following carbocation wouldhave the greatest stability?