List of top Chemistry Questions

Facial and meridional isomerism will be exhibited by

The boiling point of methanol is greater than methyl thiol because

Solubility product $(K_{sp}) $ of saturated $PbCl_2$ in water is $1.8 \times 10^{-4} \, mol^3 \, dm^{-9}$. What is the concentration of $Pb^{2+}$ in the solution?

A dye that imparts different colours to the fabric with different metal ions is called

$Al_2(SO_4)_3$ is used in the following but not

Corundum is ................ mineral of aluminium.

The reaction of $H_2$ is given below $H_2 + CO + R - CH = CH_2 \to R - CH_2 - CH_2 - CHO$ is specifically called as

An insoluble dye is reduced to a soluble colourless leuco form by an alkaline reducing agent. The fibre is soaked in the dye solution and then exposed to air to develop the colour. The dye is

The partial pressure of oxygen in the alveolar air is:

The order of reaction is decided by

Aniline is separated from aniline-water mixture by

Chlorination of benzene in the presence of halogen carrier is an example of

Choose the amide which on reduction with $ LiAl{{H}_{4}} $ yields a secondary amine

Chlorobenzene on treatment with sodium in dry ether gives diphenyl. The name of the reaction is

The correct increasing order of the acid strength of benzoic acid $(I), 4$ -nitrobenzoic acid $(II), 3,4$ -dinitrobenzoic acid(III) and $4$-methoxybenzoic acid $(IV)$ is

In the Hofmann rearrangement of primary amides having optically active group with S-configuration, the product amine has

An element 'X' belongs to fourth period and fifteenth group of the Periodic Table. Which one of the following is true ?

The $\alpha$- and $\beta$- forms of glucose are

Identify the product/s in the following reaction. $ 3C{{H}_{3}}CH=C{{H}_{2}}\xrightarrow[{}]{B{{H}_{3}}}X\xrightarrow[{}]{{{H}_{2}}{{O}_{2}}/O{{H}^{-}}} $ $ product/s+{{H}_{3}}B{{O}_{3}} $

At $ 500 \,K $ , the half-life period of a gaseous reaction at an initial pressure of $ 80\, kPa $ is $ 350 \,s $ . When the pressure is $ 40 \,kPa $ , the half-life period is $ 175 \,s $ . The order of the reaction is

Air at sea level is dense. This is a practical implimentation of:

A compound ?A?with molecular formula CHO gives a positive 2, 4 DNP test but a negative Tollen?s test. On treatment with sodium hypochlorite, it gives CHCl and compound ?B?. Compound ?B? is

The boiling point of para nitrophenol is greater than ortho nitrophenol, because:

Sodium peroxide which is a yellow solid, when exposed to air becomes white due to the formation of

If the kinetic energy of the particle is increased to $16$ times its previous value, the percentage change in the de Broglie wavelength of the particle is