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An ideal gas undergoes a reversible isothermal expansion from state $I$ to state $II$ followed by a reversible adiabatic expansion from state $II$ to state $III$ The correct plot(s) representing the changes from state $I$ to state $III$ is(are)

$(p:\text{pressure},V:\text{volume},T:\text{temperature},H:\text{enthalpy},S:\text{entropy})$

The ratio of the specific heats $\frac{C_p}{C_v}=\gamma$ in terms of degrees of freedom (n) is given by :

Identify the pair of enantiomers.

If the threshold wavelength $\left({\lambda }^o\right)$ of a metal is $330\text{nm}$, then the work function for the photoelectric emission is:

If $\Delta G=-177\text{k cal}$ for

(1) $2Fe\left(s\right)+\frac{3}{2}{O}_2\left(g\right)\to F{e}_2{O}_3\left(s\right)$

and $\Delta G=-19\text{k cal}$ for

(2) $4F{e}_2{O}_3\left(s\right)+Fe\left(s\right)\to 3F{e}_3{O}_4\left(s\right)$

What is the Gibbs free energy of formation of $F{e}_3{O}_4\left(s\right)$ ?

When an electron is added to the neutral isolated atom, energy is given out. It is an exothermic process. In this process, monoanion is formed. Electron affinity of an element is defined as the amount of energy liberated when an electron is added to the neutral isolated atom in its ground state. Greater the amount of energy released, greater is the electron affinity. Electron affinity is expressed in terms of $eVato{m}^{-1}$ or $Kcal$ or $kJmo{l}^{-1}$.

Electron affinity of elements depends on which of the following?

What is the order of a reaction which has a rate expression
rate = k [A]^3/2[B]^-1

Which of the following options cannot be represented by the plot given below?

If two elements can combineto form more than one compound, the masses of one element that combine with a fixed mass of the other element, are in whole number rato.

(a) Is this statement true ?

(b) If yes, according to which this law.

(c) Give one example related to this law.

Which one is an acidic salt?

Calculate ${\Delta }_r$ G for the reaction at ${27}^{\circ }C$
$H_2\left(g\right)+2A{g}^{+}\left(aq\right)\rightleftharpoons 2Ag\left(s\right)+2H^{+}\left(aq\right)$
Given : $p_{H_2}$ = $0.5\text{bar};\left[A{g}^{+}\right]={10}^{-5}M;\text{log 2 =0.3 log 2= 0.7}$,
$\left[H^{+}\right]={10}^{-3}M;{\Delta }_r{G}^{\circ }\left[A{g}^{+}\right(aq\left)\right]=77.1\text{kJ/mol}$

A aqueous solution consisting $0.5gKCl$ in $100mL$ water was found to freeze at $-{0.24}^{\circ }C$ .

Given :

$(K_f{)}_{\text{water}}=1.86Kkgmo{l}^{-1}{\rho }_{water}=1gm{L}^{-1}$



Choose the correct statement(s):

Calculate the amount of work done by 2 mole of an ideal gas at 298k in reversible isothermal expansion from 10 liter to 20 liter.

What will be the vapour pressure of pure components A and B respectively if vapour pressure of mixture of these two liquids is given by Pt=100+250Xb torr

4-methyl
benzene sulphonic acid reacts with sodium acetate to give:

The impact parameter $\left(b\right)$ is proportional to -



$\theta$ is scattering angle.

A vertical glass capillary tube, open at both ends, contains some water. Which of the following shapes may not be taken by the water in the tube?

(IIT-JEE 2007)

On dissolution, how will you deal with partner's loan if appears on the

(a) assets side of the balance sheet,

(b) liabilities side of balance sheet.

The polymer used as electrodes in batteries is

The below question consists of a figure matrix with one or more missing terms and followed by four answer figures (1), (2), (3) and (4). Find the correct answer figure that will replace (i) and (ii).

The reduction potential of hydrogen electrode will be positive if:

Which of the following graphs is correct for a first order reaction ?

Assuming complete dissociation, calculate the pH of the following solutions:

(i) 0.003 M HCl

(ii) 0.005 M NaOH

(iii) 0.002 M HBr

(iv) 0.002 M KOH

In chromium (III) chloride, $\left(CrC{l}_3\right)$, chloride ions have cubic close packed arrangement and $Cr\left(III\right)$ ions are present in octahedral voids.

Choose the correct option(s):