List of top Chemistry Questions

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 ?
The $ IUPAC $ name of crotonaldehyde is
Cannizaro?s reaction is not given by
Which alcohol of molecular formula $ C_4H_9OH $ cannot be obtained by the reduction of carbonyl compound ?
Stachyose is a
The half-life of a radioactive element is 10 hours. How much will be left after 4 hours in 1 g atom sample?
Which of the following is a soap?
Which of the following gives $RNC$ when treated with $CHCl_{3}$ and $KOH$?
Hinsberg reagent, $C_{6}H_{5}SO_{2}Cl$ does not react with
Correct order of freezing point of $ 1\,M $ solution of sucrose, $ KCl,\,BaCl_{2}$ and $ AlCl_{3}$ is
The condensation polymer among the following is
$5$ moles of $SO_2$ and $5$ moles of $O_2$ are allowed to react. At equilibrium, it was found that $60\% $ of $SO_2$ is used up. If the partial pressure of the equilibrium mixture is one atmosphere, the partial pressure of $O_2$, is
Which one of the following is strongest Lewis acid ?
The molar mass of the solute sodium hydroxide obtained from the measurement of the osmotic pressure of its aqueous solution at $27^{\circ} C$ is $25 \,g \,mol ^{-1}$. Therefore, its ionization percentage in this solution is
The percentage of carbon in cast iron is
Which one of the following molecules is paramagnetic?
Which one of the following does not form sodium bisulphite addition product with sodium bisulphite solution?
The most acidic among the following is
If the ratio of the rates of diffusion of two gases $A$ and $B$ is $4 : 1$, the ratio of their densities in the same order is

Which one of the following is \(d\) block element?

The auto reduction process is not used in the metallurgy of
The oxidation numbers of the sulphur atoms in peroxomonosulphuric acid $ (H_{2}SO_{5}) $ and peroxodisulphuric acid $ (H_{2}S_{2}O_{8}) $ are respectively
Which of the following has maximum laevorotatory nature ?
The composition of bell metal is
The number of molecules in $18 \,mg$ of water in terms of Avogadro number $N$ is