List of top Chemistry Questions

Which of the following elements is present as the impurity to the maximum extent in the pig iron?

Phenol can be converted to o-hydroxybenzaldehyde by

Which one among the following is most reactive towards electrophilic substitution reaction?

When 'blue vitriol' is heated at $373 \,K$, the product formed is

The lanthanide element that has the electronic configuration, $ [Xe]4f^{7}5d^{1}6s^{2} $ is

In a volumetric experiment, it was found that a solution of $KMnO _{4}$ is reduced to $MnSO _{4}$. If the normality of the solution is $1.0\, N$, then the molarity of the solution will be

Chloroform on heating with silver powder gives

Which one of the following is a secondary amine?

In a reaction $ 2A+B\to A_{2}B, $ the reactant $B$ will disappear at

The alloy of copper that contains zinc is

In zinc blende structure, the coordination number of the cation is

In which of the following compounds, carbon exhibits a valency of $4$ but oxidation state $-2$ ?

Which one of the following amines cannot be prepared by Gabriel's synthesis?

Which of the following compound is chiral?

When a solution containing non-volatile solute is diluted with water

The van't Hoff factor $i$ for a dilute aqueous solution of sucrose is

Which of the following is a correct name according to IUPAC rules?

Which of the following is the largest is size?

The $S.I$ unit of activity of a radioactive sample is

Phenol on heating with alcoholic $KOH$ and chloroform - undergoes

Freundlich adsorption isotherm equation is

The correct order of reducing character of alkali metals is

The best coagulant for the precipitation of $Fe ( OH )_{3}$ is

Zeigler-Natta catalyst is used to prepare

Two oxides of a metal contain $36.4 \%$ and $53.4 \%$ of oxygen by mass respectively. If the formula of the first oxide is $M _{2} O$, then that of the second is