List of top Chemistry Questions

The group of elements in which the differentiating electrons enters in the antipenultimate shell of atoms are called
Potassium ferrocyanide is an example of _____ complex
Lanthanides and actinides are also called as
A metal present in vitamin $B_12$ is
$+I$ effect is shown by
The electronic configuration of $Cr^{3+}$ is
In a galvanic cell, the reaction that occurs at the cathode is
Decarboxylation of an acid can be carried out using
The solution having lowest freezing point is
Which one of the following is least electropositive element?
Coordination number of nickel in$[Ni(C_2O_4)_3]^{4-}$ is
Cuprous ion is
Geometrical isomerism is exhibited by
The $ pH $ of a $ 10^{-8} $ molar solution of $ HCl $ in water is
Peptization denotes
Freundlich adsorption isotherm is
Which of the following will give a pair of enantiomers? (en $= NH_2CH_2CH_2NH_2$)
If $60\%$ of a first order reaction was completed in $60\, min$, $50\%$ of the same reaction would be completed in approximately ($log\, 4 = 0.60 \,log\, 5 = 0.69$)
The reaction of hydrogen an iodine monochloride is given as $H _{2( g )}+2 ICl _{( g )} \rightarrow 2 HCl _{( g )}+ I _{2( g )}$ This reaction is of first order with respect to $H _{2( g )}$ and $ICl _{( g )}$, following mechanisms were proposed Mechanism $A$: $H _{2( g )}+2 ICl _{( g )} \rightarrow 2 HCl _{( g )}+ I _{2( g )}$ Mechanism $B$ : $H _{2( g )}+ ICl _{( g )} \rightarrow HCl _{( g )}+ HI _{( g )} ;$ Slow $HI _{( g )}+ ICl _{( g )} \rightarrow HCl _{( g )}+ I _{2( g )} ;$ Fast Which of the above mechanism $(s)$ can be consistent with the given information about the reaction:
An element, $X$ has the following isotopic composition; ${ }^{200} X : 90 \%$ ${ }^{199} X : 8.0 \%$ ${ }^{202} X : 2.0 \%$ The weighted average atomic mass of the naturally-occurring element $X$ is closest to:
The colour of transition metal ions is due to presence of unpaired electron transitions in available empty electron in
Which one of the following compounds has $ s{{p}^{2}} $- hybridisation?
Which of the following has the smallest number of molecules?
Number of lone pair (s) in $ XeO{{F}_{4}} $ is/are
The decomposition of hydrogen peroxide can be slowed by the addition of acetamide. The latter acts as a