List of top Chemistry Questions

The number of unidentate ligands in the complex ion is called
The standard electrode potential of hydrogen electrode at $1\, M$ concentration and hydrogen gas at $1\, atm$ pressure is
Formation of coloured solution is possible when metal ion in the compound contains
The general formula of a cycloalkane is
The ionization energy of $Li^{2+}$ is equal to
Glucose gives silver mirror with ammoniacal silver nitrate because it has
When ammonium chloride is added to ammonia solution, the pH of the resulting solution will be
Extraction of zinc from zinc blende is achieved by
Consider a titration of potassium dichromate with acidified Mohr?s salt solution using diphenylamine as indicator. The number of moles of Mohr?s salt required per mole of dichromate is :
The fraction of total volume occupied by the atoms present in a simple cube is
How many chiral carbon atoms are present in $2,3,4$ - trichloropentane ?
Dalton's law of partial pressures is applicable to which one of the following systems ?
Which of the following has $p_{\pi}-d_{\pi}$ bonding
Chloramine-T is a
Chain transfer reagent is
The species having bond order different from that in $CO$ is
A solution has a $1: 4$ mole ratio of pentane to hexane. The vapour pressure of the pure hydrocarbons at $20^{\circ} C$ are $440 \,mm$ of $Hg$ for pentane and $120 \,mm$ of $Hg$ for hexane. The mole fraction of pentane in the vapour phase would be
$1\, M$ and $2.5\,L\,NaOH$ solution mixed with another $0.5\,M$ and $ 3\,L\,NaOH$ solution. Then find out molarity of resultant solution
A $5 .25\%$ solution of a substance is isotonic with a $1.5\%$ solution of urea (molar mass = $60 \,g \,mol^{-1})$in the same solvent. If the densities of both the solution are assumed to be equal to $1.0 \,g \,cm^{-3}$ molar mass of the substance will be
A mixture of ethyl alcohol and propyl alcohol has a vapour pressure of $290\, mm$ at $300\, K$. The vapour pressure of propyl alcohol is $200\, mm$. If the mole fraction of ethyl alcohol is $0.6$, its vapour pressure (in mm) at the same temperature will be
When 20 g of naphthoic acid ($C_{11}H_8O_2$) is dissolved in 50 g of benzene (K$_f = 1.72 K kg mol^{-1}$), a freezing point depression of 2 K is observed. The van-t Hoff factor (i) is
The aqueous solution containing which one of the following ions will be colourless? (Atomic no. $Sc = 21, Fe = 26, Ti = 22, Mn = 25$)
The rate of diffusion of methane at a given temperature is twice that of a gas $X$. The molecular mass of $X$ is
A solution has $ H^{+} $ ion concentration $0.0005\, M$. Its $ pOH $ is
The vapour pressure of pure benzene at a certain temperature is $0.850$ bar. A non-volatile, nonelectrolyte solid weighing $0.5\,g$ is added to $39.0\, g$ of benzene (molar mass 78 g/mol). The vapour pressure of the solution then is 0.845 bar. What is the molecular mass of the solid substance?