Explore topic-wise InterviewSolutions in Current Affairs.

Which of the following compounds does not have molecular plane as nodal plane for its $\pi$ - electron cloud?

In a $H_2-O_2$ fuel cell, 8.96 L of hydrogen at STP reacts in 15 minutes.​ The average current produced in amperes is:​

For the cell:
$T{l}_{\left(s\right)}|T{l}^{+}\left(0.001M\right)||C{u}^{+2}\left(0.1M\right)|C{u}_{\left(s\right)}$
$E_{cell}=0.83V$ at 298 K, the cell potential can be increased by

Which of the following minerals are present in granite?

Which hybrid orbitals
are used by carbon atoms in the following molecules?

CH₃–CH₃;
(b) CH₃–CH=CH₂;
(c) CH₃-CH₂-OH;
(d) CH₃-CHO
(e) CH₃COOH

Wavelengths of different radiations are given below:

$\lambda \left(A\right)=400\text{nm}\lambda \left(B\right)=400\mu \text{m}$

$\lambda \left(C\right)=40\text{nm}\lambda \left(D\right)=40\stackrel{\circ }{A}$

Arrange these radiations in the increasing order of their energies:

In each of the following pairs of ions which ion is more stable?

In an electrolysis experiment current was passed for 5 hours through two cells connected in series. The first cell contains a solution of gold and the second contains copper sulphate solution. 9.85 g of gold was deposited in the first cell. If the oxidation number of gold is +3, find the amount of copper deposited on the cathode of the second cell.

(At.wt. of Au = 197 and At.wt of Cu = 63.5)

When $3g$ urea (Mol weight 60 g/mol) is dissolved in $45g$ of water. The relative lowering of vapour pressure is:

Equilibrium constant, K_c for the reaction

at 500 K is 0.061.

At a particular time, the analysis shows that composition of the reaction mixture is 3.0 mol L^–1 N₂, 2.0 mol L^–1 H₂ and 0.5 mol L^–1 NH₃. Is the reaction at equilibrium? If not in which direction does the reaction tend to proceed to reach equilibrium?

Trichloroacetaldehyde, ${\text{CCl}}_3\text{CHO}$ reacts with chlorobenzene in presence of sulphuric acid and produces

In the atomic volume vs atomic weight of the elements graph, which of the following elements occupies an ascending position on the curve?

Bond
angle in
is
higher than that in PH₃.
Why?

An electron in an atom jumps in such a way that its kinetic energy changes from $x$ to $\frac{x}{4}$. The change in potential energy will be:

A $2\text{mW}$ laser operates at a wavelength of $500\text{nm}$. The number of photons that will be emitted per second is

[Given Planck's constant $h=6.6\times {10}^{-34}\text{Js}$, speed of light $c=3.0\times {10}^8\text{m/s}]$

The electronic configuration of $T{i}^{2+}$ is

Chromium metal crystallises with a body-centred cubic lattice. The length of the unit cell edge is found to be 287 pm. Calculate the atomic radius. What would be the density of chromium in g/cc?

Using the standard electrode potential valuesl predict if the reaction between the following is feasible :

(i) $F{e}^{3+}\left(aq\right)and{I}^{-}\left(aq\right)$

(ii) $A{g}^{+}\left(aq\right)andCu\left(s\right)$

(iii) $F{e}^{3+}\left(aq\right)andB{r}^{-}\left(aq\right)$

(iv) $Ag\left(s\right)$ and $F{e}^{3+}\left(aq\right)$

(v) $B{r}_2\left(aq\right)andF{e}^{2+}\left(aq\right)$

Given standard electrode potentials

$E_{\frac{1}{2}\frac{t_2}{1^{-}}}^{\circ }=+0.541V{E}_{\left(\frac{C{u}^{2+}}{Cu}\right)}^{\circ }=+0.34V{E}_{\left(\frac{1}{2}\frac{B{r}_2}{B{r}^{-}}\right)}^{\circ }=+1.09V{E}_{\left(\frac{A{g}^{+}}{Ag}\right)}^{\circ }=+0.80V{E}_{\left(\frac{F{e}^{3+}}{F{e}^{2+}}\right)}^{\circ }=+0.77V$

Solid ammonium carbamate dissociates into $N{H}_3$ and $C{O}_2$ as $N{H}_{2}COON{H}_4\rightleftharpoons N{H}_3\left(g\right)+C{O}_2\left(g\right).$ The total pressure at equilibrium is 5 atm. Calculate the equilibrium constnat $K_p.$

The standard enthalpy of formation of $N{H}_3$ is $46.0kJmo{l}^{-1}$. If the enthalpy of formation of $H_2$ from its atom is $-436kJmo{l}^{-1}$ and that of $N_2$ is $-712kJmo{l}^{-1}$, the average bond enthalpy of $N-H$ bond in $N{H}_3$ is

Which one of the following is not a buffer solution?

1. 53.6

Hydrolysis of sucrose is given by the following reaction.$\text{Sucrose}+H_{2}O\rightleftharpoons \text{Glucose + Fructose}$

If the equilibrium constant $\left(K_C\right)$ is $2\times {10}^{13}\text{at}300K$, The value of ${\Delta }_r{G}^{\circ }$ at the same temparature will be :

The number of sodium atoms in 4 moles of sodium ferrocyanide $\left(N{a}_3\right[Co\left(N{O}_2{)}_6\right])$ is:
(Consider Avogadro's number = $6\times {10}^{23})$

A silver cup is plated with silver by passing 965 coulombs of electricity, the

amount of silver deposited is

[EAMCET 1990; MP PET 1994, 97]