List of top Chemistry Questions

If the ratio of the rates of diffusion of two gases $A$ and $B$ is $4 : 1$, the ratio of their densities in the same order is
The oxidation numbers of the sulphur atoms in peroxomonosulphuric acid $ (H_{2}SO_{5}) $ and peroxodisulphuric acid $ (H_{2}S_{2}O_{8}) $ are respectively

Which one of the following is \(d\) block element?

The auto reduction process is not used in the metallurgy of
Which of the following has maximum laevorotatory nature ?
The composition of bell metal is
Which one of the following is aromatic?
The number of molecules in $18 \,mg$ of water in terms of Avogadro number $N$ is
The set of quantum numbers $ n=4,l=0 $ and $ s=+\frac{1}{2} $ correspond to the most loosely bound, ground state electron of which one of the following atoms?
The solubility product of a sparingly soluble metal hydroxide $M ( OH )_{2}$ at $298 \,K$ is $5 \times 10^{-16} mol ^{3} d m^{-9}$. The $pH$ value of its aqueous and saturated solution is

Parkinson's disease is linked to abnormalities in the levels of dopamine in the body. The structure of dopamine is
Aluminium reacts with NaOH and forms compound 'X'. If the coordination number of aluminium in 'X' is 6, the correct formula of X is
The total number of acyclic structural and optical isomers possible for a hydrocarbon of molecular formula $ C_{7}H_{16} $ is
The bacteriostatic antibiotic among the following is
In which one of the following equilibria, the increase of pressure over the equilibrium will favour the reaction?
When an excess and a very dilute aqueous solution of $ KI $ is added to a very dilute aqueous solution of silver nitrate, the colloidal particles of silver iodide are associated with the Helmholtz double layer
Lattice energy of an ionic compound depends upon
For a first order reaction at 27$^{\circ}$C, the ratio of time required for 75% completion to 25% completion of reaction is
Which one of the elements with the following outer orbital configurations may exhibit the largest number of oxidation states?
The dissociation constants for acetic acid and $HCN$ at $25^{\circ} C$ are $1.5 \times 10^{-5}$ and $4.5 \times 10^{-10}$ respectively. The equilibrium constant for the equilibrium $CN ^{-}+ CH _{3} COOH \rightleftharpoons HCN + CH _{3} COO ^{-}$ would be :
The main difference between formic acid and acetic acid is that formic acid is
Adipic acid is used in the preparation of
Which one of the following is the correct quadratic form of the Ostwald's dilution law equation?
The one which decreases with dilution is
The characteristic not related to alkali metal is