List of top Chemistry Questions

$0.06\%\, (w/v)$ aqueous solution of urea is isotonic with
Cobalt (III) chloride forms several octahedral complexes with ammonia. Which of the following will not give test for chloride ions with silver nitrate at $25^{\circ } C$?
The hybridization involved in complex $ {[Ni(CN)4]^{2-}}$ is (At.No. Ni = 28)
The sum of coordination number and oxidation number of the metal M in the complex \([M(en)_2(C_2O_4)]Cl\) (where en is ethylenediamine) is :-
Nitrogen dioxide and sulphur have some properties in common. Which property is shown by one of these compounds, but not by the other?
The rate constant of the reaction $ A \to B$ is $0.6 \times 10^{-3}$ mole per second. If the concentration of A is 5 M, then concentration of $B$ after 20 minutes 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 electrolyte having maximum flocculation value for $AgI/Ag^+$ sol is
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 ?
How many ions per molecule are produced in the solution when Mohr salt is dissolved in excess of water ?
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 ?
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 will be able to show geometrical isomerism ?
Which of the following compound possesses the "C - H" bond with the lowest bond dissociation energy ?
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