List of top Chemistry Questions

The compound $A$ on treatment with $Na$ gives $B$ , and with $PCl_5$ gives $C. B$ and $C$ react together to give diethyl ether. $A, B$ and $C$ are in the order
The solubility of $BaSO _{4}$ in water is $2.42 \times 10^{-3}\, gL ^{-1}$ at $298 \,K$. The value of its solubility product $\left( K _{ sp }\right)$ will be (Given molar mass of $BaSO _{4}=233 \,g\, mol ^{-1}$ )
Match the metal ions given in Column I with the spin magnetic moments of the ions given in Column II and assign the correct code :
Column I Column II
a. $Co^{3+}$ i. $\sqrt{8} B.M$
b. $Cr^{3+}$ 11. $\sqrt{35} B.M$
c. $Fe^{3+}$ iii. $\sqrt{3} B.M$
d $Ni^{2+}$ iv $\sqrt{24} B.M$
v $\sqrt{15} B.M$
Which one of the following ions exhibits $d-d$ transition and paramagnetism as well ?
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
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 $1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6}$ ?
Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to their
$[Fe(NO_2)_3 Cl_3]$ 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 ?