List of top Chemistry Questions

Hydrolysis of one mole of peroxodisulphuric acid produces
A dilute aqueous solution of $ Na_2SO_4 $ is electrolysed using platinum electrodes. The products at the anode and cathode are respectively
Which of the following ion in aqueous medium has orange colour?
Which of the following acids, will be able to give silver mirror test?
What is the oxidation number of chromium in chromyl chloride?
The number of possible optical isomers of lactic acid are:
The molar conductivity of an aqueous solution of strong electrolyte:
Ethyl amine reacts with $ HN{{O}_{2}} $ to give:
Emulsifier is an agent which:
Which one of the following molecules is planar?
Copper sulphate dissolves in ammonical solution to give deep blue colour. The colour is due to the formation of:
The IUPAC name of the compound, $ {{C}_{2}}{{H}_{5}}NHCOC{{H}_{3}} $ is:
On heating one end of a piece of a metal, the other end becomes hot because of
The number of possible isomers of the compound with molecular formula $C_7H_8 O$ is
The normal boiling point of water is 373 K(at 760 mm). Vapour pressure of water at 298 K is 23 mm. If enthalpy of vaporisation is 40.656 kJ the boiling point of water at 23 mm atmospheric pressure will be
The $ BCl_3$ is a planar molecule whereas $NCl_3$ is pyramidal because
The correct order of the $O - O$ bond length in $O_2,H_2 O_2 $ and $O_3 $ is
If enthalpies of formation for $C _{2} H _{4}(g), CO _{2( g )}$ and $H _{2} O _{(1)}$ at $25^{\circ} C$ and $1\, atm$ pressure are $52,-394$ and - $286\, kJ / mol$ respectively, then enthalpy of combustion of $C _{2} H _{4}( g )$ will be
The concentration units independent of temperature would be
The percentage weight of Zn in white vitriol $[ZnSO_4 . 7H_2O]$ is approximately equal to $(at. \, mass\, of \, Zn= 65, S=32, 0=16 \, and \, H= 1)$
Stainless steel contains iron and
The loss of electron is termed as
The number of geometrical isomers for [Pt(NH3)2Cl2] is
The oxidation number of chromium in potassium dichromate is
The number of moles of oxygen in 1 L of air containing 21% oxygen by volume, under standard conditions, is