List of top Chemistry Questions

The stability of dihalides of $Si, Ge, Sn $ and $Pb$ increases steadily in the sequence

The stable electronic configuration of chromium is

The reaction of toluene with $Cl_2$ in presence of $FeCl_3$ gives predominantly

The monomer of the polymer

The ionization energy of $10$ times ionized sodium atom is

The hardness of water sample containing $ 0.002 $ mole of magnesium sulphate dissolved in a litre of water is expressed as

The equlibrium constant for the reaction $ 2N{{O}_{2}}(g) \rightleftharpoons 2NO(g)+{{O}_{2}}(g) $ is $ 2\times {{10}^{-6}} $ at $ 185{}^\circ C $ . Then the equilibrium constant for the reaction, $ 4NO(g)+2{{O}_{2}}(g) \rightleftharpoons $ $ 2N{{O}_{2}}(g) $ at the same temperature would be

The element which is the most abundant in the earth crust is

The density of air is $0.001293\, g / cc$ at STP. Its vapour density is

The correct order of ease of dehydration of following is

The correct order of basic strength is

The coordination number in $hcp$ is

The compound formed as a result of oxidation of ethyl benzene by $KMnO_4$ is

The actinoids exhibits more number of oxidation states in general than the lanthanoids. This is because

Supercritical $CO_{2}$ is used as

Small liquid drops assume spherical shape because

Presence of a nitro group in a benzene ring

Photon of frequency $?$ has a momentum associated with it. If $c$ is the velocity of light, the momentum is

Styrene can be purified by

One mole of an ideal gas at an initial temperature of $T \,K$ does $6R$ joules of work adiabatically. If the ratio of specific heats of this gas at constant pressure and at constant volume is $5/3$, the final temperature of gas will be

Internal energy is sum of

Natural rubber is a polymer of

NaOH is

$\Psi^{2}=0$ represent

$A$ when added to silica will give $B A$ and $B$ are