According to \(MO\) theory the bond orders for \(O _2{ }^{2-}\), \(CO\) and \(NO ^{+}\)respectively, are

Let us consider an endothermic reaction which is non-spontaneous at the freezing point of water. However, the reaction is spontaneous at boiling point of water. Choose the correct option.

Choose the correct tests with respective observations.
(A) \(\mathrm{CuSO}_4\) (acidified with acetic acid) \(+ \mathrm{K}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right] \rightarrow\) Chocolate brown precipitate.
(B) \(\mathrm{FeCl}_3+\mathrm{K}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right] \rightarrow\) Prussian blue precipitate.
(C) \(\mathrm{ZnCl}_2+\mathrm{K}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]\), neutralised with \(\mathrm{NH}_4 \mathrm{OH}\) \(\rightarrow\) White or bluish white precipitate.
(D) \(\mathrm{MgCl}_2+\mathrm{K}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right] \rightarrow\) Blue precipitate.
(E) \(\mathrm{BaCl}_2+\mathrm{K}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]\), neutralised with NaOH \(\rightarrow\) White precipitate.
Choose the correct answer from the options given below :

\({image}\) In the above reaction, \(3.9\, g\) of benzene on nitration gives \(4.92\, g\) of nitrobenzene. The percentage yield of nitrobenzene in the above reaction is............. \(\%\). (Round off to the Nearest Integer). (Given atomic mass: \(C : 12.0\, u , H : 1.0\, u\)\(O : 16.0\, u , N : 14.0\, u )\)

In Carius tube, an organic compound ' \(X\) ' is treated with sodium peroxide to form a mineral acid ' \(Y\) '. The solution of \(BaCl _2\) is added to ' \(Y\) ' to form a precipitate ' \(Z\) '. ' \(Z\) ' is used for the quantitative estimation of an extra element. ' \(X\) ' could be:

The hybridization of \(P\) exhibited in \(P F_{5}\) is \(s p^{x} d^{y}\). The value of \(y\) is \(...\)

Butane reacts with oxygen to produce carbon dioxide and water following the equation given below
\(\mathrm{C}_4 \mathrm{H}_{10}(\mathrm{~g})+\frac{13}{2} \mathrm{O}_2(\mathrm{~g}) \rightarrow 4 \mathrm{CO}_2(\mathrm{~g})+5 \mathrm{H}_2 \mathrm{O}(\mathrm{l})\)
If 174.0 kg of butane is mixed with 320.0 kg of \(\mathrm{O}_2\), the volume of water formed in litres is ________.(Nearest integer)
[Given : (a) Molar mass of \(\mathrm{C}, \mathrm{H}, \mathrm{O}\) are 12, 1, \(16 \mathrm{~g} \mathrm{~mol}^{-1}\) respectively, (b) Density of water \(\left.=1 \mathrm{~g} \mathrm{~mL}^{-1}\right]\)

\(\left( {\left( {\begin{array}{*{20}{c}}
{21}\\
1
\end{array}} \right) - \left( {\begin{array}{*{20}{c}}
{10}\\
1
\end{array}} \right)} \right) + \left( {\left( {\begin{array}{*{20}{c}}
{21}\\
2
\end{array}} \right) - \left( {\begin{array}{*{20}{c}}
{10}\\
2
\end{array}} \right)} \right)\)\( + \left( {\left( {\begin{array}{*{20}{c}}
{21}\\
3
\end{array}} \right) - \left( {\begin{array}{*{20}{c}}
{10}\\
3
\end{array}} \right)} \right) + \;.\;.\;.\)\( + \left( {\left( {\begin{array}{*{20}{c}}
{21}\\
{10}
\end{array}} \right) - \left( {\begin{array}{*{20}{c}}
{10}\\
{10}
\end{array}} \right)} \right) = \)

Two transparent media having refractive indices \(1.0\) and \(1.5\) are separated by a spherical refracting surface of radius of curvature \(30\,cm\). The centre of curvature of surface is towards denser medium and a point object is placed on the principle axis in rarer medium at a distance of \(15\,cm\) from the pole of the surface. The distance of image from the pole of the surface is .......\(cm\)

The difference in the reaction of phenol with bromine in chloroform and bromine in water medium is due to.

Given below are two statements : One is labelled as Assertion \(A\) and the other is labelled as Reason \(R\) Assertion \(A\) : Thin layer chromatography is an adsorption chromatography. Reason \(R\): A thin layer of silica gel is spread over a glass plate of suitable size in thin layer chromatography which acts as an adsorbent. In the light of the above statements, choose the correct answer from the options given below.

If \(\frac{1}{n+1}{ }^n C_n+\frac{1}{n}{ }^n C_{n-1}+\ldots+\frac{1}{2}{ }^{ n } C _1+{ }^{ n } C _0=\frac{1023}{10}\) then \(n\) is equal to

For the reaction, \(A(g) + B(g) \to  C(g) + D(g),\)  \(\Delta H^o\) and \(\Delta S^o\) are, respectively, \(-29.8\,\,kJ\, mol^{-1}\)  and \(-0.100\,\,kJ\,K^{-1}\) \(mol^{-1}\) at  \(298\,K.\)  The equilibrium constant for the reaction at  \(298\,K\)  is