Explore topic-wise InterviewSolutions in Current Affairs.

The peptide linkage formed between glycine and a alanine to give glycylalanine can be shown as:

The enthalpies of atomization of $C{H}_4\left(g\right)$ and $C_2{H}_6\left(g\right)$ are respectively $400kJmo{l}^{-1}$ and $670kJmo{l}^{-1}.$ The value of $△H_{C-C}$ would be

I The amount of glucose to be dissolved in 500g of water so as to produce the same lowering in vapour pressure as that of 0.2 moral aqueous urea solution

The oxidation state of Cr in $Cr{O}_6$ is

The French physicist Louis de Broglie in 1924 postulated that matter, like radiation, should exhibit a dual behaviour. He proposed the following relationship between the wavelength lambda of a material particle, its linear momentum p and planck constant h.
$\lambda =\frac{h}{p}=\frac{h}{mv}$
The de Broglie relation implies that the wavelength of a particle should decrease as its velocity increases. It also implies that for a given velocity heavier particles should have shorter wavelength than lighter particles. The waves associated with particles in motion are called matter waves or de Broglie waves. These waves differ from the electromagnetic waves as they
$\left(i\right)$ have lower velocities
$\left(ii\right)$ have no electrical and magnetic fields and
$\left(iii\right)$ are not emitted by the particle under consideration.
The experimental confirmation of the de Broglie’s relation was obtained when Davisson and Germer, in 1927, observed that a beam of electrons is diffracted by a nickel crystal. As diffraction is a characteristic property of waves, hence the beam of electron behaves as a wave, as proposed by de Broglie.

Using Bohr’s theory, the transition, so that the electron's de-Broglie wavelength becomes 3 times of its original value in $H{e}^{+}$ ion will be?

A $500W$ power source emits UV light having a wavelength of $2000\stackrel{\circ }{A}$. How many photons are emitted per minute by the source?

The correct order of the calculated spin-only magnetic moments of complexes $A$ to $D$ is:
$\left(A\right)Ni(CO{)}_4$
$\left(B\right)\left[Ni\right(H_{2}O{)}_6{]}^{2+}$
$\left(C\right)N{a}_2\left[Ni\right(CN{)}_4]$
$\left(D\right)PdC{l}_2(PP{h}_3{)}_2$

For the reaction: $2HI\left(g\right)\rightleftharpoons H_2\left(g\right)+I_2\left(g\right)$

The degree of dissociation of $HI$ (g) is related to equilibrium constant, $K_p$ by the expression

What will be the $H^{+}$ ion concentration of 0.01 M $HCN$ solution at equilibrium, if it is 20% ionised?

$\begin{array}{cccc}& \text{Column I}& & \text{Column II}\\ \text{(a)}& 1.8ml{H}_{2}O(d=1g/ml)& \text{p}& 10.8g\\ \text{(b)}& 500mlof2.24V{H}_2{O}_2& \text{(q)}& 2.4\times {10}^{23}atoms\\ \text{(c)}& \text{per hydrol}& \text{(r)}& \text{0.1 moles}\\ \text{(d)}& \text{0.1 gm atom of Ag}& \text{(s)}& 1.8\times {10}^{23}atoms\\ & & \text{(t)}& 30.35\%w/v\end{array}$

Increasing rate of $S_{N}1$ reaction in the following compounds is:

Some amines are shown below

Which statement is/are correct?

i) Physical adsorption is due to Van der Waal's forces

ii) Physical adsorption decreases at high temperature

iii) Physical adsorption is irreversible

iv) Enthalpy for a chemical adsorption is generally lesser than that of physical adsorption

Which code will represent the word KHVLRDP?

A living cell contains a solution which is isotonic with $0.3\text{M}$ sugar solution. What osmotic pressure develops when the cell is placed in a $0.1\text{M KCl}$ solution at body temperature?

How much $NaN{O}_3$ must be weighed out to make $100mL$ of an aqueous solution containing $23mgofN{a}^{+}permL$?

Ionic
solids, which have anionic vacancies due to metal excess defect,
develop colour. Explain with the help of a suitable example.

In the nucleophilic addition of CN^-1 to carbonyl compound the intermediate formed is

The product of Oxidation of $I^{-}$ with $Mn{O}_4^{-}$ in alkaline medium is

An organic compund ${}^{\prime }{A}^{\prime }$ on treatment with $N{H}_3$ gives ${}^{\prime }{B}^{\prime }$ which on heating gives ${}^{\prime }{C}^{\prime },{}^{\prime }{C}^{\prime }$ when treated with $B{r}_2$ in the presence of $KOH$ produces ethylamine. Compound ${}^{\prime }{A}^{\prime }$ is :

A vessel is filled with a mixture of oxygen and nitrogen. At what ratio of partial pressure will the mass of the gases be identical?

The product (III) of the following reaction sequence is:

The molar conductivity of a $0.5mol/d{m}^3$ solution of $AgN{O}_3$ with electrolytic conductiviy of $5.76\times {10}^{-3}Sc{m}^{-1}$ at 298 K is

The degree of dissociation $\left(\alpha \right)$ of a weak electrolyte, $A_x{B}_y$ is related to the van ’t Hoff factor (i) by the expression:

Calculate the packing fraction of an FCC and BCC to 2 decimal places. Add it together, multiply it by 100 and type the answer.

For the reaction equilibrium

$N_2{O}_4\left(g\right)\rightleftharpoons 2N{O}_2\left(g\right)$ the concentrations of $N_2{O}_4$ and $N{O}_2$ at equilibrium are $4.8\times {10}^{-2}$ and $1.2\times {10}^{-2}mol{L}^{-1}$ respectively. The value of $K_c$ for the reaction is

Out
of C₆H₅CH₂Cl
and C₆H₅CHClC₆H₅,
which is more easily hydrolysed by aqueous KOH?

Which one of the following figure gives the failure envelope for a normally consolidated saturated clay sample tested in triaxial test under drained conditions?

The total number of tetrahedral voids in the face centred unit cell is ................

(a) 6 (b) 8 (c) 10 (d) 12