Explore topic-wise InterviewSolutions in Current Affairs.

The air in a steady flow enters the system at a pressure of 8 bar ${180}^{\circ }C$, with a velocity of 80 m/s and leaves at 1.4 bar, ${20}^{\circ }C$ with a velocity of 40 m/s. The temperature of the surroundings is ${20}^{\circ }C$ and pressure is 1 bar.



What is the maximum theoretic work which must be available?

A 5.25% solution of a substance is isotonic with a 1.5% solution of urea (Molar mass $=60\text{g/mol}$) in the same solvent.
If the densities of both the solutions are assumed to be equal to $1{\text{g/cm}}^3$, the molar mass of the substance will be:

Find the amount of residue obtained in grams when $2.76\text{g}$ of silver carbonate is strongly heated.

(Molar mass of $Ag=108\text{g/mol}$)

$A{g}_{2}C{O}_3\stackrel{\Delta }{\to }2Ag+C{O}_2+\frac{1}{2}{O}_2$

An unsaturated hydrocarbon $X$ on ozonolysis gives $A$. Compound $A$ when warmed with ammonical silver nitrate forms a bright silver mirror along the sides of the test tube. The unsaturated hydrocarbon $X$ is :

Stability order of following compounds is:

The hybridisation of boron in $B{H}_3$ molecule is .

What is the realationship between the two terminal groups in a cumulene containing three consecutive double bonds?$(H_{2}C=C=C=C{H}_2)$

Burst the bubbles with statements that have 8 as the answer.

Compounds [A] and [B] are respectively

Carbon monoxide gas is more dangerous than carbon dioxide gas. Why?

Which of the following is not a chemical method for preparation of colloids?

$E^{\circ }$ for some half cell reactions are given below
$S{n}^{+4}+2e^{-}\to S{n}^{2+};E^{\circ }=0.151V$
$2H{g}^{2+}+2e\to H{g}_2^{2+};E^{\circ }=0.92V$
$Pb{O}_2+4H^{+}2e^{-}\to P{b}^{2+}+2H_{2}O;E^{\circ }=1.45V$
Based on the given data which statement is correct.

Which of the following is the correct IUPAC name of the compound below?

$BrC{H}_2-\left(CON{H}_2\right)CH-CO-C{H}_2-C{H}_3$

Henry’s
law constant for CO₂
in water is 1.67 × 10⁸
Pa at 298 K. Calculate the quantity of CO₂
in 500 mL of soda water when packed under 2.5 atm CO₂
pressure at 298 K.

In the reaction shown below, the major product(s) formed is/are



(IIT-JEE Advanced, 2014)

For a molecule with two like chiral carbon atoms, the number of optically inactive form is ?

At low pressures (For 1 mole), the van der Waals equation is written as $[p+\frac{a}{V^2}]V=RT$ The compressibility factor is then equal to:

$C{H}_{3}COOH\left(l\right)+C_2{H}_{5}OH\left(l\right)\rightleftharpoons C{H}_{3}COO{C}_2{H}_5\left(l\right)+H_{2}O\left(l\right)$

In the above reaction, one mole of each of acetic acid and alcohol are heated in the presence of

little conc. $H_{2}S{O}_4$. On equilibrium being attained

Question 29

Grapes hanging on the plant do not ferment but after being plucked from the plant can be fermented.



Under what conditions do these grapes ferment? Is it a chemical or a physical change?

The standard reduction potentials at 298 K for the following half reactions are given,



$Z{n}_{\left(aq\right)}^{2+}+2e^{-}\rightleftharpoons Z{n}_{\left(s\right)}$ $E^{\circ }$= $-0.762V$



$C{r}_{\left(aq\right)}^{3+}+3e^{-}\rightleftharpoons C{r}_{\left(s\right)}$ $E^{\circ }$= $-0.740V$



$2H_{\left(aq\right)}^{+}+2e^{-}\rightleftharpoons H_{2\left(g\right)}$ $E^{\circ }$= $0.000V$



$F{e}_{\left(aq\right)}^{3+}+e^{-}\rightleftharpoons F{e}_{\left(s\right)}^{2+}$ $E^{\circ }$= $0.770V$



Which is the strongest reducing agent?

Find the magnitude of enthalpy of formation of $HCl$ (in $kjmo{l}^{-1}$) if the bond dissociation enthalpy of $H_2$, $C{l}_2$ and $HCl$ are 434, 242 and 431 kj $mo{l}^{-1}$ respectively.

An open large tank with a nozzle attached contains three immiscible, inviscid fluids as shown. Assuming that the changes in $h_1,h_2$ and $h_3$ are negligible, the instantaneous discharge velocity is