List of top Chemistry Questions

The total number of orbitals in a shell can be given in the form of $n$. The principal quantum number is
Which one of the following is the strongest acid?
Which of the following can give iodometric titration?
Rate constant of a first order reaction is $ 0.0693\,\,{{\min }^{-1}} $ . If we start with $ 20\,mol\,{{L}^{-1}}, $ it is reduced to $ 2.5\,mol\,{{L}^{-1}} $ in:
Which one of the following compounds has $sp^2-$ hybridisation?
Among $KO_2$, $AlO_2^-$ , $BaO_2$ and $NO_2^+$, unpaired electron is present in
Smoke is an example of:
Lowering of vapour pressure is highest for
Azeotropic mixture of $ HCl $ and water has
Vapour pressure of benzene at $30^{\circ} C$ is $121.8\, mm$. when $15\, g$ of a non-volatile solute is dissolved in $250\, g$ of benzene, its vapour pressure is decreased to $120.2\, mm$. The molecular weight of the solute is
Addition of $ HgC{{l}_{2}} $ to $ SnC{{l}_{2}} $ gives a brown black colour which is due to the
Which contains both polar and non-polar bonds?
Which of the following cannot be formed ?
If 1, 3-dibromopropane reacts with zinc and NaI, the product obtained is
A solution wiht $pH = 2$ is more acidic than one with a $pH = 6$, by a factor
A base, as defined by Bronsted theory, is a substance which can
Orlon is a polymer of
The enthalphy change of a reaction does not depend upon
A useful member of lanthanides is
The art of electroplating was given by
Phosphorus on reaction with cone $ HN{{O}_{3}} $ yields
Which of the following is an alloy of aluminium?
Which of the following is not an aromatic compound?
Which of the following is not emitted by radioactive substance?
The hydride ion $H^-$ is stronger base than its hydroxide ion $OH^-$. Which of the following reactions will occur if sodium hydride (NaH) is dissolved in water?