List of top Chemistry Questions

A strong base can abstract an $\alpha$-hydrogen from

In a given shell the order of screening effect is

In transforming $0.01$ mole of $PbS$ to $PbSO _{4}$, the volume of ' $10$ volume' $H _{2} O _{2}$ required will be

Number of moles of $MnO^{-}_4$ required to oxidise one mole of ferrous oxalate completely in acidic medium will be

The degree of dissociation of $XY$ in case of following reaction is found to be $ 0.4 $ from vapour density measurement. If the observed vapour density of $X Y$ be $100$ then its molecular weight is $ XY\to X+Y $

Amines behave as

An element with atomic number $21$ is a

The angular shape of ozone molecule $ (O_3 )$ consists of

In the reaction; $Fe ( OH )_{3( s )} \rightleftharpoons Fe ^{3+}{ }_{( aq )}+3 OH _{\text {(aq) }}^{-}$, if the concentration of $OH ^{-}$ ions is decreased by $\frac{1}{4}$ times, then the equilibrium concentration of $Fe ^{3+}$ will increase by,

The value of equilibrium constant of the reaction, $ HI(g) \rightleftharpoons \frac{1}{2} H_2 (g) + \frac{1}{2} I_2 (g)\, \, is\, \, 8.0 $ . The equilibrium constant of the reaction, $ H_2 (g) + I_2 (g) \rightleftharpoons 2HI(g) $ Will be

For the reaction $Fe_2O_3 +3CO \rightarrow 2Fe + 3CO_2$ the volume of carbon monoxide required to reduce one mole of ferric oxide is

The increasing order of the rate of HCN addition to compounds A-D is : (A) HCHO $(B)CH_{3} COCH_{3}$ $\left(C\right)phCOCH_{3}$ $\left(D\right)phcoph$

A gas deviates from ideal behaviour at a high pressure because its molecules

The monomers of buna-$S$ rubber are

Mesomeric effect involves delocalisation of

The calculated bond order of superoxide ion $(O_2^- )$ is

Which of the following electrolytic solutions has the least specific conductance ?

Which of the following is considered as an anticancer species?

Volume occupied by one molecule of water $(density\, = 1 g\, cm^{-3} )$ is

$80\,g$ of oxygen contains as many atoms as in

$10 \,cm^3$ of $0.1\, N$ monobasic acid requires $15 \,cm^3$ of sodium hydroxide solution whose normality is

Which of the following species does not exert a resonance effect ?

Malleability and ductility of metals can be accounted due to

Which is the most easily liquifiable rare gas ?

Which of the following can be measured by the Ostwald-Walker dynamic method ?