List of top Chemistry Questions

Complete the following reactions: $(i)$ $ {C2H5I + H2 ->[Zn - Cu][C_2H_5OH]} X$ $(ii)$ $ {CH3COONa + H2O ->[Electrolysis] Y }$ $(iii)$ $ {CH3CH2CH2CH2CH2CH3 ->[Cr_2O_3/Al_2O_3][773\,K] Z }$

Compare the energies of two radiations $E_1$ with wavelength $800\,nm$ and $E_2$ with wavelength $400\,nm$.

Common oxidation state of scandium, a transition is/are [Ar. No. of Sc = 21]

Colour in transition metal compounds is attributed to

Colloidal particles exhibit Tyndall effect due to

Colloidal solution can be purified by

Colloidal solutions are not purified by

Colloidal sulphur is obtained when

Colloidal gold is prepared by

Collin's reagent can cause the conversion of

Colloid of which one of the following can be prepared by electrical dispersion as well as reduction method ?

Coinage metals show the properties of

Coefficients x, y and z in the following balanced equation $ {xMnO^{-}_4 + y H_2S + z H^{+} -> S + Mn^{2+} + H_2O}$ are respectively

$[CoF_{6}]^{3-}$ is

Cod Liver oil is

Coal tar is the main source of

$ {CO}$ is an example of

Coal gas is a mixture of :

CO is poisonous gas. Antidote for CO poisoning is

$ {CO + H_2}$ is known as -

Co-existence of biotic and abiotic components of the environment alongwith climatic factors such as temperature, humidity, etc. is called

Clathrates are the compounds obtained from noble gases and

Cloud or fog is an example of colloidal system of

Classify the following compounds as primary, secondary and tertiary halides. (i) 1-Bromobut-2-ene (ii) 4-Bromopent-2-ene (iii) 2-Bromo-2-methylpropane

Claisen condensation is not given by