List of top Chemistry Questions

The IUPAC name of $[Co(NH_3)_4 Cl(NO_2)]Cl$ is
The electronic configuration of transition element "X", is +3, oxidation state is $ {[Ar] 3d^5}$. What is its atomic number ?
Identify the reaction in which monobasic and dibasic acids are formed
In the reaction ..... the electrophile involved is
The type of isomerism shown by the complex $[CoCl_2(en)_2]$ is
Iron carbonyl, $Fe(CO)_5$ is
Which of the following oxides is most acidic in nature ?
Magnesium reacts with an element $(X)$ to form an ionic compound. If the ground state electronic configuration of $( X )$ is $1 s ^{2} 2 s ^{2} 2 p ^{3}$, the simplest formula for this compound is
Which of the following carbocations is expected to be most stable ?
Which of the following molecules represents the order of hybridisation $sp^2 , sp^2, sp, sp$ from left to right atoms ?
Which of the following is correct with respect to $- I$ effect of the substituents ? $(R =$ alkyl $)$
The compound $C_7H_8$ undergoes the following reactions: $ { C_7H_8 ->[3 \, Cl_2 / \Delta] A ->[Br_2 /Fe] B ->[Zn / HCl ] C }$ The product ??$C$ ' is
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 ?
Given van der Waals constant for $NH _{3}, H _{2}, O _{2}$ and $CO _{2}$ are respectively $4.17, 0.244, 1.36$ and $3.59$, which one of the following gases is most easily liquefied?
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
If aniline is treated with conc. $H_2SO_4$ and heated at $200^{\circ}C$, the product is
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
$C_4H_10 O { ->[{K_2Cr_2O_7}][{H_2SO_4}] }C_4H_5O { ->[{I_2/NaOH}][{\text{Warm}}] }CHI_3$ Here, N is
The nucleus ${^{64}_{29}Cu}$ accepts an orbital electron to yield.
Which is least thermally stable?