List of top Chemistry Questions

To dissolve 0.9 g metal, 100 mL of 1 N HCl is used. What is the equivalent weight of metal?
In a homonuclear molecule, which of die following sets of orbitals is degenerate?
$29.5\, mg$ of an organic compound containing nitrogen was digested according to Kjeldahl?s method and the evolved ammonia was absorbed in $20\, mL$ of $0.1\, M\, HCl$ solution. The excess of the acid required $15 \,mL$ of $0.1\, M\, NaOH$ solution for complete neutralization. The percentage of nitrogen in the compound is
Violet coloured complex obtained in the detection of sulphur is
In an organic compound, phosphorus is estimated as
Chemical formula of Prussian blue is
Most stable carbonium ion is
The effective atomic number of $ Cr $ (atomic no. $24$) in $ [Cr(NH_3)_6]Cl_3 $ is
Aqueous solutions of $HNO_3 \, KOH, \, CH_3COOH$ and $CH_3COONa $ of identical concentrations are provided. The pair(s) of solutions which form a buffer upon mixing is(are)
At $25^{\circ}C$, the solubility product of $Mg\left(OH\right)_{2} $ is $1.0 \times 10^{-11}$. At which pH, will $Mg^{2+}$ ions start precipitating in the form of $Mg\left(OH\right)_{2}$ from a solution of $0.001 \,M \,Mg^{2+}$ ions ?
For the reaction $A B(g) \rightleftharpoons A(g)+B(g), A B$ is $33 \%$ dissociated at a total pressure of $p$. Therefore, $p$ is related to $K_{p}$ by one of the following options
If the solubility product of lead iodide $(PbI_2)$ is $3.2 \times 10^{-8}$, its solubility will be
In aqueous solution the ionization constants for carbonic acid are $K_1 = 4.2 \times 10^{-7}$ and $K_2 = 4.8 \times 10^{-11}$ Select the correct statement for a saturated 0.034 M solution of the carbonic acid.
What is the $pH$ of $0.01\, M$ glycine solution? For glycine $K_{a_1} = 4.5 \times 10^{-3}$ and $K_{a_2} = 1.7 \times 10^{-10}$ at $298 \,K$.
When pressure is applied to the equilibrium systems : Ice $\leftrightharpoons $ water (liquid), which of the following will take place?
Calculate $K_{C}$ for the reversible process given below if $K_{P}=167$ and $T=800^{\circ} C$ $CaCO _{3}( s ) \rightleftharpoons CaO ( s )+ CO _{2}( g )$
$0.1\, (M)\, HCl$ and $0.1\, (M)\, H_2SO_4$ each of volume $2ml$ are mixed and the volume is made up to $6\, ml$ by adding $2\,ml$ of $0.01\, (N)\, NaCl$ solution. The $pH$ of the resulting mixture is
The relation between $K_p$ and $K_c$ for the following reaction is $\hspace10mm N_2 (g)+3H_2(g) \longrightarrow 2NH_3(g)$
The pH of 10$^{-3}$ M solution of NaOH is
A solution contains 10 mL 0.1 N NaOH and 10 mL $0.05 NH_2SO_4 $,PH of this solution is
Which of the following mixtures can be used to prepare a buffer solution ?
For the reaction, $N_{2}(g)+3 H_{2}(g) \rightleftharpoons 2 N H_{3}(g)$ at $400\, K,\, K_{p}=41 .$ Find the value for the following reaction, $\frac{1}{2} N _{2}(g)+\frac{3}{2} H _{2}(g) \rightleftharpoons NH _{3}(g)$
The maximum number of $P-H$ bonds are contained in which of the following molecules?
Which of the following processes occurs in the electrolysis of an aqueous solution of nickel chloride at nickel anode?
The shape and hybridisation of some xenon oxyfluorides are given. Choose the wrong set.