For the reaction \(H _{2} F _{2( g )} \rightarrow H _{2( g )}+ F _{2( g )}\) \(\Delta U =-59.6\,kJ\,mol ^{-1} \text { at } 27^{\circ}\,C\). The enthalpy change for the above reaction is (-) \(kJ mol ^{-1}\) [nearest integer] Given : \(R =8.314\,JK ^{-1}\,mol ^{-1}\)

Given below are two statements:
Statement I: In the oxalic acid vs \(\mathrm{KMnO}_4\) (in the presence of dil \(\mathrm{H}_2 \mathrm{SO}_4\) ) titration the solution needs to be heated initially to \(60^{\circ} \mathrm{C}\), but no heating is required in Ferrous ammonium sulphate (FAS) vs \(\mathrm{KMnO}_4\) titration (in the presence of dil \(\mathrm{H}_2 \mathrm{SO}_4\) )
Statement II: In oxalic acid vs \(\mathrm{KMnO}_4\) titration, the initial formation of \(\mathrm{MnSO}_4\) takes place at high temperature, which then acts as catalyst for further reaction. In the case of FAS vs \(\mathrm{KMnO}_4\), heating oxidizes \(\mathrm{Fe}^{2+}\) into \(\mathrm{Fe}^{3+}\) by oxygen of air and error may be introduced in the experiment.
In the light of the above statements, choose the correct answer from the options given below

In the above chemical reaction sequence " \(\mathrm{A}\) " and " \(\mathrm{B}\) " respectively are :

The purification method based on the following physical transformation is :

The number of hydrogen bonded water molecule(s) associated with stoichiometry \(\mathrm{CuSO}_{4} .5 \mathrm{H}_{2} \mathrm{O}\) is .... .

Total number of aromatic compounds among the following compounds is _______.

Solute \(A\) associates in water. When \(0.7\, g\) of solute \(A\) is dissolved in \(42.0\, g\) of water, it depresses the freezing point by \(0.2^{\circ} C\). The percentage association of solute \(A\) in water, is \(.....\,\%\) [Given : Molar mass of \(A =93\, g\, mol ^{-1}\). Molal depression constant of water is \(1.86\, K \,kg\, mol ^{-1}\) ]

The equation of a common tangent to the parabolas \(y = x ^{2}\) and \(y =-( x -2)^{2}\) is.

A beam of monochromatic light is used to excite the electron in \(Li ^{++}\)from the first orbit to the third orbit. The wavelength of monochromatic light is found to be \(x \times 10^{-10} \; m\). The value of \(x\) is \(\dots.\) [Given hc \(=1242 \; eV nm ]\)

Let \([\cdot]\) denote the greatest integer function. Then the value of \(\displaystyle\int_0^3 \left(\dfrac{e^x + e^{-x}}{[x]!}\right) dx\) is :

If a rubber ball falls from a height \(h\) and rebounds upto the height of \(h / 2\). The percentage loss of total energy of the initial system as well as velocity ball before it strikes the ground, respectively, are _______.

\(N _{2( g )}+3 H _{2( g )} \rightleftharpoons 2 NH _{3( g )}\) \(20 \;g \;\;\;\;5 \;g\) Consider the above reaction, the limiting reagent of the reaction and number of moles of \(NH _{3}\) formed respectively are

The major product of the following reaction contains \(.....\) bromine atom(s).