Explore topic-wise InterviewSolutions in Current Affairs.

67.THE RATIO OF E2-E1 AND E4-E3 FOR THE HYDROGEN ATOM IS APPROXIMATELY EQUAL TO

(A)10

(B)15

(C)17

(D)12.

The ratio fo rates of diffusion of $S{O}_2,O_{2}andC{H}_4$ is

Which of the following carbanions are not resonance stabilized?

How
can you prepare Cl₂
from HCl and HCl from Cl₂?
Write reactions only.

Alkanes readily burn in excess of air or Oxygen to give

If two volatile liquids A and B forms a minimum boiling azeotrope at $X_A=0.5$.

For $P_A^0=400torr\text{and}{P}_B^0=500torr$ then choose the correct option:

Here, $P^0$ is the vapour pressure of the azeotropic mixture .

1. 679.4

Calculate the weight of non - volatile solute having molecular weight $40$, which should be dissoved in $57\text{g}$ octane to reduce its vapour pressure to $80\%$.

The hybridization of boron in $B_2{H}_6$ is

Rank the following compounds in the decreasing order of their stability:

If the difference in boiling points of two liquids is not much we employ:

The enthalpy of vapourisation of water is $9700calmo{l}^{-1}$. Given that pure water boils at ${100}^{\circ }C$, then calculate the value of ebullioscopic constant of water :

Identify total number of $3^o$ hydrogens and $2^o$ hydrogens present in the given compound :

$H_{3}C-C(C{H}_3{)}_2-(C{H}_2{)}_2-CH(C{H}_3{)}_2$

Construct galvanic cells from the following pairs of half cells and calculate their emf at ${25}^{o}C.$



$F{e}^{3+}(aq,0.1M),F{e}^{2+}(aq,1M)|Pt\left(s\right);E_{F{e}^{3+}/F{e}^{2+}}^0=0.77V$



$Ag\left(s\right)|AgCl\left(s\right)\mid C{l}^{-}(aq,0.001M);E_{AgCl/Ag}^0=0.22V$

Estimate
the fraction of molecular volume to the actual volume occupied by
oxygen gas at STP. Take the diameter of an oxygen molecule to be 3Å.

${\pi }_1,{\pi }_2,{\pi }_{3}and{\pi }_4$ are the osmotic pressures of 5% $\left(\frac{W}{V}\right)$ solutions of urea, fructose, sucrose and KCl respectively at certain temperatures. The correct order of their magnitude is

Explain empirical formula with method and example in detail?

An open flask containing air is heated from $300K$ to $500K$ . What percentage of air will be escaped to the atmosphere, if pressure is kept constant?

The enthalpy of formation of methane at constant pressure and $300K$ is $-75.83KJ$. What will be the heat of formation at constant volume? $(R=8.3J{K}^{-1}mo{l}^{-1}$)

Which of the following will not be stable?

1 mole of an ideal gas at 20 atm pressure and 15 L volume expands such that the final pressure becomes 10 atm and the final volume becomes 60 L. Calculate the change in entropy for the process.

$(C_{p.m}=30{\text{J mole}}^{-1}{\text{K}}^{-1},R=\frac{25}{3}\text{J/mol K, ln 2 = 0.7, ln 3 = 1.1})$.

Describe
the effect of:

a)
Addition of H₂

b)
Addition of CH₃OH

c)
Removal of CO

d)
Removal of CH₃OH

on
the equilibrium of the reaction:

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 :