List of top Chemistry Questions

Which of the following organic compounds has same hybridization as its combustion product CO2 ?
\(Be^{2+}\) is isoelectronic with which of the following ions?
Which of the following will not be soluble in sodiumhydrogen carbonate?
An elemental crystal has a density of $8570 \,kg / m ^{3}$. The packing efficiency is $0.68$. The closest distance of approach between neighbouring atom is $2.86 \,?$. What is the mass of one atom approximately?
Which one is most reactive towards Nucleophilic addition reaction?
Which form coloured salts :
The correct order of magnetic moments (spin only values in B.M.) is:
1.0 g of magnesium is burnt with 0.56 g O2 in a closed vessel. Which reactant is left in excess and how much? (At. wt. Mg = 24 ; O = 16)
The standard molar heat of formation of ethane, $CO_2$ and water are respectively $-21.1, -94.1$ and $-68.3\, kcal$. The standard molar heat of combustion of ethane will be
The equivalent conductivity of a solution containing $2.54\, g$ of $CuSO _{4}$ per $L$ is $91.0\, W ^{-1} cm ^{2} eq ^{-1}$. Its conductivity would be
The solubility product of $Ag _{2} CrO _{4}$ is $32 \times 10^{-12}$. What is the concentration of $CrO _{4}^{-}$ions in that solution?
Which of the following hydrogen bonds are strongest in vapour phase?
$ {Ph - C \equiv C- CH_3 ->[Hg^{2+} / H^+ ] A }$
According to Bohr?s theory, the angular momentum for an electron of $3rd$ orbit is
Which of the following isomerism is shown by ethyl acetoacetate?
The rate constant for forward reaction and backward reaction of hydrolysis of ester are $1.1 \times 10^{-2}$ and $1.5 \times 10^{-3}$ per minute respectively. Equilibrium constant for the reaction is $CH _{3} COOC _{2} H _{5}+ H _{2} O \rightleftharpoons CH _{3} COOH + C _{2} H _{5} OH$
The volume strength of $1.5 \, N \, H_2O_2$ solution is
A gaseous reaction $X_2(g) \to Y + \frac{1}{2} Z(g)$ There is increase in pressure from $100 \,mm$ to $120 \,mm$ in $5$ minutes. The rate of disappearance of $X_2$ is
The bond angles of $NH _{3}, NH _{1}^{+}$and $NH _{2}^{-}$are in the order
In the reaction, $8 Al +3 Fe _{3} O _{4} \longrightarrow 4 Al _{2} O _{3}+9 Fe$ the number of electrons transferred from the reductant to the oxidant is
Peptisation involves
Which of the following has an ester linkage?
A metal has bcc structure and the edge length of its unit cell is $3.04\, ?$. The volume of the unit cell in $cm^3$ will be
The correct statement for the molecule, $CsI_3$ is
Among the following organic acids, the acid present in rancid butter is :