List of practice Questions

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:
$\log_3\,2, \log_6\,2, \log_{12}\,2$ are in
Light wave enters from medium $1$ to medium $2$. Its velocity in $2^{nd}$ medium is double from $1^{st}$. For total internal reflection the angle of incidence must be greater than
If the sequence of bases in the coding strand of a double stranded $DNA$ is $5'\, GTTCGAGTC-3'$, the sequence of bases in its transcript will be
If the linear momentum is increased by $50\%$, then kinetic energy will increase by
If an atom crystallises in bcc lattice with r = 4 $?? then the edge length will be
Consider the system shown in figure. The pulley and the string are light and all the surfaces are frictionless. The tension in the string is (take g = 10 m s)
Best reagent for the conversion of $AgNO_3$ to Ag is
XX-XY type of sex determination mechanism is an example of male heterogamety. In birds, male heterogamety is seen as males produce two different types of gametes.
When acetamide reacts with $NaOH$ and $Br_2$, methyl amine is formed. The reaction occurs through intermediate formation of isocyanate.
When an object is placed between two plane parallel mirrors, then all the images found are of equal intensity. In case of plane parallel mirrors, only two images are possible.