List of top Chemistry Questions

Point out incorrect stability order
The molarity of $NO_3^-$ in the solution after $2L$ of $3M \, AgNO_3$ is mixed with $3L$ of $1M \, BaCl_2$ is
The chemical composition of slag formed during the smelting process in the extraction of copper is
If the equilibrium constant for ${ N2(g) + O2(g) <=> 2NO(g)}$ is K, the equilibrium constant for ${ \frac{1}{2} N_2 (g) + \frac{1}{2} O_2 (g) <=> NO(g) }$ will be :
What is the pH of the resulting solution when equal volumes of $0.1\, M \,NaOH$ and $0.01\, M$ $HCl$ are mixed ?
The two electrons have the following set of quantum numbers: $P = 3 , 2 , - 2 , + \frac {1}{2}$ $Q = 3,0,0,+\frac {1}{2}$ Which of the following statement is true ?
The electrolyte having maximum flocculation value for $AgI/Ag^+$ sol is
On heating with concentrated $NaOH$ solution in an inert atmosphere of $CO_2$ white phosphorous gives a gas. Which of the following statement is incorrect about the gas ?
How many ions per molecule are produced in the solution when Mohr salt is dissolved in excess of water ?
In $H_2 - O_2$ fuel cell the reaction occurring at cathode is
Which one of the following electrolytes has the same value of van't Hoff's factor (i) as that of $ {Al_2(SO_4)_3}$ (if all are 100% ionised) ?
$ : CCl_2 $ is
An alkali metal hydride $(NaH)$ reacts with diborane in $A$ to give a tetrahedral compound $B$ which is extensively used as reducing agent in organic synthesis. The compounds $A$ and $B$ respectively are
Which of the following compound possesses the "C - H" bond with the lowest bond dissociation energy ?
Which of the following will be able to show geometrical isomerism ?
In presence of $HCl, H_2S$ results the precipitation of Group-2 elements but not Gp-4 elements during qualitative analysis. It is due to
How many Coulombs of electricity are required for the oxidation of one mol of water to dioxygen ?
While charging the lead storage battery
The formation of cyanohydrin from a ketone is an example of
Which one of the following is an allylic halide ?
Copper is extracted from Copper pyrites by heating in a Bessemer converter. The method is based on the principle that
The salt which responds to dilute and concentrated $H_2SO_4$ is
Using MOT, compare $O_2^+$ and $O_2^-$ species and choose the incorrect option.
One of the following amide will not undergo Hoffmann bromamide reaction :
In a first order reaction, the concentration of the reactant is reduced to $12.5\%$ in one hour. When was it half completed ?