List of top Chemistry Questions

In the following reaction the reagent A is,
\[ {Ar-N2^+X^- →[A] Ar-N2^+BF4^- →[\Delta] Ar-F + BF3 + N2} \]
What is the molecular formula of nitrogen sesquioxide?
A certain sample of gas has a volume of \(0.2\ \text{L}\) at one atmosphere pressure and \(273.15\ \text{K}\). What is the volume of gas at \(273.15^\circ\text{C}\) at the same pressure?
When one mole of lactose is hydrolysed, the hydrolysate contains
Which of the following conditions indicates the reaction is spontaneous?
Which of the following benzylic alcohol is tertiary alcohol?
What is the site of action of antihistamine?
Which of the following solution will have highest freezing point depression?
What is the oxidation number of Fe in K\(_3\)[Fe(CN)\(_6\)]?
Identify 'A' in the following reaction
C\(_2\)H\(_5\)OH + HCl \(\xrightarrow{A}\) C\(_2\)H\(_5\)Cl + H\(_2\)O
Identify the number of oxygen atoms present in saccharic acid.
What is the oxidation state of sulphur in oil of vitriol?
Which among the following is a correct formula of Barium tetrachlorocuprate(II)?
The electronic configuration of Be$_2$ molecule according to MOT is
The number of possible monohalogen derivatives for the alkyl halide having molecular formula \(\mathrm{C_4H_9X}\) is
Identify product ‘C’ in the following reaction:
\[ \text{Propylene dibromide} \xrightarrow[\text{Alcohol}]{\text{Zn},\,\Delta} A \xrightarrow{\text{HBr}} B \xrightarrow[\text{ether}]{\text{Na}} C \]
What will be the volume of oxygen gas produced, If the reaction
2 KClO\(_3\)(s) \(\rightarrow\) 2 KCl(s) + 3 O\(_2\)(g) \(\Delta H^\circ = -78 \, \text{kJ}\)
is carried out at S.T.P.?
Which of the following reactions proves the chlorinating property of phosphorus pentachloride?
Which of the following polymers is used to obtain adhesives?
What is the number of moles of silver chloride precipitated when excess aqueous silver nitrate is treated with \([\mathrm{Co(NH_3)_4Cl_2]Cl}\)?
A mixture of starch, sodium hydrogen carbonate, and potassium hydrogen tartrate is known as
In colloidal dispersion of starch, the maximum possible size of starch particle is
Which among the following reactions occurs at the zone of slag formation in extraction of iron by blast furnace?
During electrolysis of aqueous NaCl, the product obtained at cathode is
Which among the following complexes is NOT a heteroleptic complex?