List of top Chemistry Questions

Sea water is converted into fresh water based on the phenomenon of

Pure benzene freezes at $5.3^{\circ} C$. A solution of $0.223 \,g$ of phenylacetic acid $(C_6H_5CH_2COOH)$ in $4.4\, g$ of benzene $(h_f = 5.12\,kg\,mol^{-1})$ freezes at $4.47^{\circ} C$. From this observation, one can conclude that

Pressure versus temperature graph of an ideal gas is as shown in figure. Density of the gas at point $A$ is $\rho_{0}$. Density at point $B$ will be

Primary, secondary and tertiary amines can be distinguished by

Permanent hardness of water can be removed by adding

Percentage of free space in cubic close packed structure and in body centred packed structure are respectively

Passing $H _{2} S$ gas through nitric acid produces

Oxidation number of $N$ is $ HN{{O}_{3}} $ is

Oxalic acid on heating with conc. $ H_2SO_4$ gives

Non-zero dipole moment is shown by

Nitrogenous base that found in $RNA$ but absent in $DNA$ is

Methane can be converted to ethane by the reaction

Least volatile hydrogen halide is

In Tyndall effect the colloidally suspended particles

In the complex ion $\left[ Co \left( NH _{3}\right)_{6}\right]^{3+}$, the $NH _{3}$ molecules are linked to the central metal ion by

In tetragonal crystal system, which of following is not true?

In Lucas test an alcohol react immediately and gives insoluble chloride. The alcohol is

How many ions are produced from $ [Co{{(N{{H}_{3}})}_{6}}]C{{l}_{3}} $ in solution?

How many bonds are there in

Highest electron affinity is shown by

Highest oxidation state of $Mn$ is present in

For a particular reversible reaction at temperature $T, \,\Delta H$ and $\Delta S$ were found to be both $+ve$. If $T_{e}$ is the temperature at equilibrium, the reaction would be spontaneous when

Electrophilic addition reaction is easily given by

EDTA has coordination number

In the electrolysis of which solution, $OH^-$ ions are discharged in preference to $Cl^-$ ions ?