List of practice Questions

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

Materials suitable for permanent magnet, must have which of the following properties ?

A bar magnet of length $3\, cm$ has points $A$ and $B$ along its axis at distances of $24 \,cm$ and $48\, cm$ on the opposite sides. Ratio of magnetic fields at these points will be

A short bar magnet placed with its axis at $ 30^{\circ} $ with a uniform external magnetic field of $ 0.16\,T $ experiences a torque of magnitude $ 0.032\,J $ . The magnetic moment of the bar magnet will be

Isogonic lines are those for which

The magnetic poles of earth do not coincide with the geographic poles. The discrepancy between the orientation of a compass and true north-south direction is known as magnetic declination.

When pressure is applied to the equilibrium systems : Ice $\leftrightharpoons $ water (liquid), which of the following will take place?

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, $\frac{1}{2} N _{2}(g)+\frac{3}{2} H _{2}(g) \rightleftharpoons NH _{3}(g)$

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)

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

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 ?

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 ?

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 $298 \,K$.

Particle moves a distance $x$ in time $t$ according to equation $x=(t+5)^{-1}$ The acceleration of particle is proportional to