Explore topic-wise InterviewSolutions in Current Affairs.

Element P, Q, R and S belong to the same group. The oxide of P is acidic, oxide of Q and R are amphoteric while the oxide of S is basic. Which of the following elements is the most electropositive ?

Predict the compound E and F of the given Wittig reactions.

How would you explain the fact that the first ionisation enthalpy of sodium is lower than that of magnesium but its second ionisation enthalpy is higher than that of magnesium?

The time required for $100\%$ completion of a zero order reaction is .
(a is the initial concentration and k is the rate constant)

Differentiate the
following w.r.t. x:

For an ideal gas, consider only P-V work in going from an initial state X to the final state Z . The final state Z can be reached by either of the two paths shown in the figure. Which of the following choice(s) is(are) correct?
[Take $△S$ as change in entropy and $w$ as work done]

Two orifices of the same size at depth of $25cm$ and $100cm$ under the surface of water. The discharge ratio through these orifices are

For a Chemical Process at constant temperature and pressure, $\Delta H$ is Equal to

The number of unpaired electrons in [V(H₂O)6]³⁺ is:

A fire hydrant delivers water of density ρ at a volume rate l. The water travels vertically upwards through the hydrant and then does 90⁰ turn to emerge horizontally at speed υ. The pipe and nozzle have uniform cross-section throughout. The force exerted by water on the corner of the hydrant is

The solubility product of a sparingly soluble salt $A{X}_2$ is $3.2\times {10}^{-11}.$ The value $s^3$ $\left(inmol{L}^{-1}\right)$ is:
where s = solubility

Given the standard electrode potentials,
$K^{+}/K=-2.93V,A{g}^{+}/Ag=0.80V,H{g}^{2+}/Hg$
$=0.79V$
$M{g}^{2+}/Mg=-2.37V.C{r}^{3+}/Cr=-0.74V$
Arrange these metals in their increasing order of reducing power.

Which is the strongest acid in the following?

For the dissociation reaction, $N_2{O}_4\rightleftharpoons 2N{O}_2\left(g\right)$, the equilibrium constant $K_p$ is 0.120 atm at 298 K and total pressure of system is 2 atm. Calculate the degree of dissociation of $N_2{O}_4$.

At ${90}^{\circ }\text{C}$, pure water has $\left[H^{+}\right]={10}^{-6}\text{M}$. The value of $K_w$ at ${90}^{\circ }\text{C}$ is ____

Be and Al exhibit many properties which are similar, but the two elements differ in:

X$H_{2}S{O}_4$+Y$S{O}_2$+Z$N{a}_{2}Cr{o}_4$ $⟶$$C{r}_2(S{O}_4{)}_3$) +A$N{a}_{2}S{O}_4$+B$H_{2}O$X,Y,Z,AandB are?

Comment
on the thermodynamic stability of NO_(g),
given

N_2(g)
+
O_2(g)
→
NO_(g)
; Δ_rH^θ
= 90 kJ mol^–1

NO_(g)
+O_2(g)
→
NO_2(g)
: Δ_rH^θ=
–74 kJ mol^–1

Autoprotolysis constant of $N{H}_3$ is

The frequency of a wave is $6\times {10}^{15}{\text{s}}^{-1}$. Its wave number will be:

Which of the following is true regarding ideal solutions?

Which of the following is present in most of the factory wastes?

Consider an electrochemical cell: ​



$A\left(s\right)|A^{n+}(aq,2M)||B^{2n+}(aq,1M)|B\left(s\right).$ The value of $\Delta H^0$for the cell reaction is thrice that of $\Delta G^0$ at​ 300 K. If the emf of the cell is zero, the $\Delta S^0$ in $J{K}^{–1}mo{l}^{–1}$ of the cell reaction per mole of B formed at 300 K is: ​

Given:

$ln\left(2\right)=0.7$,

$R=8.3J{K}^{–1}mo{l}^{–1}$. ​

H, S and G are enthalpy, entropy and Gibbs energy, respectively.



​

what is the final product (B) of this sequence ?

The size of iso electronic species $F^{‑}$ , $Ne$ and $N{a}^{+}$ is affected by