List of top Chemistry Questions

Aluminium reacts with $NaOH$ and forms compound '$X$'. If the coordination number of aluminium in '$X$' is $6$, the correct formula of $X$ is
$1.5 \,g$ of $CdCl_2$ was found to contain $0.9 \,g$ of $Cd$. Calculate the atomic weight of $Cd$.
What are $X$ and $Y$ in the following reaction sequence? $C_2H_5OH \xrightarrow{Cl_2}(X) \xrightarrow{Cl_2} Y$.
What are $ABC$ in the following reactions ? (I) $(CH_2CO_2)_2Ca \xrightarrow{\Delta} A$ (II) $CH_3CO_2H \xrightarrow[\text{Red}]{HI} B$ (III) $2CH_3CO_2 \xrightarrow{P_4O_{10}} C$
How many '$mL$' of perhydrol is required to produce sufficient oxygen which can be used to completely convert $2L$ of $SO_2$ gas to $SO_3$ gas?
A compound has four $ sp^{3}$ hybridized covalent bonds. Its shape is
The $ 'd' $ orbital involved in the hybridisation in the $ PCl_{5} $ molecule is
The term quaternary structure is used in the context of
Which of the following is correct?
The atom of smallest atomic radius among the following is
For the reaction $N _{2}( g )+ O _{2}( g ) \rightleftharpoons 2 NO ( g )$ the equilibrium constant is $K _{1}$. The equilibrium constant is $K _{2}$ for the reaction $2 NO ( g )+ O _{2}( g ) \rightleftharpoons 2 NO _{2}( g ) .$ What is $K$ for the reaction $NO _{2}( g ) \rightleftharpoons 1 / 2 N _{2}( g )+ O _{2}( g ) ?$
The percentage (by weight) of sodium hydroxide in a $ 1.25 $ molal $ NaOH $ solution is
In an oxidation-reduction reaction, $MnO _{4}^{-}$ion is converted to $Mn ^{2+}$. What is the number of equivalents of $KMnO _{4}$ (mol. wt. $=158$ ) present in $250\, mL$ of $0.04\, M\, KMnO _{4}$ solution ?
Ethyl butyrate has the flavour of which fruit ?
The $ IUPAC $ name of crotonaldehyde is
The ionisation constant of ammonium hydroxide is $ 1.77 \times 10^{-5} $ at $298\, K.$ Hydrolysis constant of ammonium chloride is
Which alcohol of molecular formula $ C_4H_9OH $ cannot be obtained by the reduction of carbonyl compound ?
Cannizaro?s reaction is not given by
The ionization energy of the electron in the hydrogen atom in its ground state is $13.6\, eV.$ The atoms are excited to higher energy levels to emit radiations of $6$ wavelengths. Maximum wavelength of emitted radiation corresponds to the transition between
Stachyose is a
Polyethylene glycol method is used for
Steps taken by the Government of India to control air pollution include
The number of photo electrons emitted for light of a frequency $\upsilon$ (higher than the threshold frequency $v_0) $ is proportional to
Among the following which is the strongest oxidising agent?
The half-life of a radioactive element is 10 hours. How much will be left after 4 hours in 1 g atom sample?