List of top Chemistry Questions

Calculate the molarity of a solution of $ 30\,g $ of $ Co(NO_3)_2.6H_2O $ in $ 4.3\, L $ of solution ? Consider atomic mass of $ Co = 59\, u $ , $ N = 14\, u $ , $ O = 16\,u $ , $ H = 1\,u $
Consider the change in oxidation state of Bromine corresponding to different emf values as shown in the diagram below : is Then the species undergoing disproportionation is
Ferric ion forms a Prussian blue precipitate due to the formation of
A compound formed by elements $X$ and $Y$ crystallizes in the cubic structure, where $X$ atoms are at the corners of a cube and $Y$ atoms are at the centres of the body. The formula of the compound is
If aniline is treated with conc. $H_2SO_4$ and heated at $200^{\circ}C$, the product is
$C_4H_10 O { ->[{K_2Cr_2O_7}][{H_2SO_4}] }C_4H_5O { ->[{I_2/NaOH}][{\text{Warm}}] }CHI_3$ Here, N is
The nucleus ${^{64}_{29}Cu}$ accepts an orbital electron to yield.
Which is least thermally stable?
The main reason the $SiCl_4$ is easily hydrolysed as compared to $CCl_4$ is that
The ease of hydrolysis in the compounds $CH _{3} COCl ( I ), CH _{3}- CO - O - COCH _{3}( II )$ $CH _{3} COOC _{2} H _{5}( III )$ and $CH _{3} CONH _{2}( IV )$ is of the order
Which of the following arrangements shows the schematic alignment of magnetic moments of antiferromagnetic substance ?
Among the following, the branched chain polymer is
The geometry and magnetic behaviour of the complex $[Ni(CO)_4]$ are
To which group and period does the element belong if the electronic configuration of an element in its $-2$ oxidation state is $1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6}$ ?
Which of the following statements is not true for halogens?
Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to their
Which of the following oxides is most acidic in nature ?
$[Fe(NO_2)_3 Cl_3]$ and $[Fe(O - NO)_3 \, Cl_3]$ shows
The reagent 'X' used for the following reaction is
Which of the following are extensive properties?
Consider the following species : $CN^{+} , CN^{-} , NO $ and $CN$ Which one of these will have the highest bond order ?
In the structure of \({ClF_3}\), the number of lone pairs of electrons on the central atom \(Cl\) is:
During a reversible adiabatic process, the pressure of a gas is found to be proportional to the cube of its absolute temperature. The ratio $\frac{C_P}{C_V}$ for the gas is
Which one is a wrong statement ?
Iron exhibits $bcc$ structure at room temperature. Above $900^{\circ}C$, it transforms to fee structure. The ratio of density of iron at room temperature to that at $900^{\circ}C$ (assuming molar mass and atomic radii of iron remains constant with temperature) is