List of practice Questions

Which pair of the following 4d series of elements has the same number of electrons in 4d subwell?
Which of the following can be oxidised by $SO_2$ ?
Value of $\left[\left(\log_{b}\,a\right)\left(\log_{c}\,b\right)\left(\log_{a}\,c\right)\right]$ is
Two elements $A$ and $B$ form compounds of formula $AB_2$ and $AB_4$. When dissolved in $20.0\, g$ of benzene $1.0 \,g$ of $AB_2$ lowers f. pt. by 2.3$^{\circ}$C whereas $1.0\, g$ of $AB_4$ lowers f. pt. by 1.3$^{\circ}$C. The $K_f$ for benzene is $5.1$. The atomic masses of $A$ and $B$ are
Thermal decomposition of ammonium dichromate gives
The two coherent sources with intensity ratio $\beta$ produce interference. The fringe visibility will be
The substance magnetite is
The stress-strain graph of a material is shown in the figure. The region in which the material is elastic is
The self inductance of a long solenoid carrying current is independent of
The reaction, $C_6H_5ONa + CO_2 + H_2O \to C_6H_5OH + NaHCO_3$ suggests that
The intensity ratio of the maxima and minima in an interference pattern produced by two coherent sources of light is 9 : 1. The intensities of the used light sources are in ratio
The freezing point of a solution containing 0.2 g of acetic acid in 20.0 g benzene is lowered by 0.45 $^{\circ}$C. The degree of association of acetic acid in benzene is (Assume acetic acid dimerises in benzene and $K_f$ for benzene = $5.12\, K \,kg \,mol^{-1}$) $M_{observed}$ of acetic acid = 113.78
The energy stored in a parallel plate capacitor of cross section area $ A $ with a separation $ d $ being filled with dielectric of dielectric constant $ \varepsilon_{0} $ in terms of the electric field between them, $ E $ is
The emergent ray of light after refraction at a rectangular glass slab
The electric field strength in $N \,C\,^{-1}$ that is required to just prevent a water drop carrying a charge $1.6 \times 10^{-19} \, C$ from falling under gravity is $(g\, = \,9.8\, ms^{-2}$, mass of water drop = $0.0016\,g$)
The correct set of four quantum numbers for the electron in the outermost subshell of $ Cu $ atom (atomic number 29) in its ground state, is
Tetradynamous condition is found in
Some of the steps of DNA fingerprinting are given below. Identify the correct sequence from the options given : A. Electrophoresis of DNA fragments B. Hybridisation with DNA probe C. Digestion of DNA by RENs D. Autoradiography E. Blotting of DNA fragments to nitrocellulose membrane
$\sin^{2}\,\theta\, \cos^{3}\,\theta-\sin^{4}\,\theta\, \cos\,\theta$ is equal
$ \frac{sin\,60^{\circ}+i\,cos\,60^{\circ}}{cos\,15^{\circ}-i\,sin\,15^{\circ}}= $
Oxidative decarboxylation occurs during the formation of
Out of the following statements with respect to the postulates of Werner?? theory, (1) the central metal atom of coordination compounds shows two types of valencies (2) the primary valencies are normally non ionisable and are satisfied by neutral molecules or negative ions (3) the secondary valencies are ionisable and are satisfied by negative ions only (4) the ions/groups bound by the secondary linkages to the metal have characteristic spatial arrangements corresponding to different coordination numbers The incorrect statements are
Oil used as frothing agent in froth floatation process is
Milk is an emulsion in which:
Micelles are: