List of top Chemistry Questions

In the $3^{rd}$ period, the first ionisation potential is of the order

In the periodic table, the period number corresponds to

A cross-linked polymer is

For Freundlich isotherm a graph of log $\frac {x}{m}$ is plotted against $log\, P$. The slope of the line and its y-axis intercept, respectively corresponds to

Butylated hydroxy toluene as a food additive acts as

Enthalpy of combustion of carbon to $CO _{2}$ is $-393.5 \,kJ \,mol ^{-1}$. What amount of heat will be released upon formation of $35.2 \,g$ of $CO _{2}$ from carbon and oxygen gas?

Which of the following compounds undergoes nitration more readily?

The reaction of phenol with benzoyl chloride to give phenyl benzoate is known as :

$6$ litres of an alkene require $27$ litres of oxygen at constant temperature and pressure for complete combustion. The alkene is:

Arrange in the correct order of stability (decreasing order) for the following molecules :

Which of the following compounds will not undergo Friedal-Craft's reaction easily?

The order of basicity of amines in gaseous state is:

The molarity of a solution obtained by mixing $750\, mL$ of $0.5\, M \,HCl$ with $250\, mL$ of $2 \,M \,HCl$ will be

Sodium Carbonate cannot be used in place of $(NH_4)_2CO_3$ for the identification of $Ca^{2+},\, Ba^{2+}$ and $Sr^{2+}$ ions (in group V) during mixture analysis because :

The correct set of four quantum numbers for the valence electrons of rubidium atom $(Z = 37)$ is

Benzene and naphthalene form an ideal solution at room temperature. For this process, the true statement(s) is (are)

Equimolar solutions of the following compounds are prepared separately in water. Which will have the lowest pH value ?

Which of the following is a polar molecule ?

The order of stability of the following tautomeric compounds is

The radical is aromatic because it has

Nitrobenzene on reaction with conc. HNO₃/H₂SO4 at 80-100°C forms which one of the following products ?

Which is the monomer of Neoprene in the following ?

6.02 × 10²⁰ molecules of urea are present in 100 mL of its solution. The concentration of solution is

In the reaction A is

Some meta-directing substituents in aromatic substitution are given. Which one is most deactivating ?