Identify the incorrect statement/s.
A. The maximum number of electrons that can be accommodated in an atom, in which the largest Principal quantum number value is 4 , is 54 . B. According to Rydberg, all series of lines in Hydrogen spectrum can be described by the equation:
\(\frac{1}{\lambda}=109677\left(\frac{1}{n_1^2}-\frac{1}{n_2^2}\right) \mathrm{cm}^{-1}\) where \(\left(n_1

1. A Only A
2. B Neither A nor B
3. C Both A and B
4. D Only B

Match the reaction in Column I with the major product formed given in Column II.
\(\begin{array}{|l|l|l|} \hline & \text { Column I- Reaction/conditions } & & \text { Column II- Product } \\ \hline A & \mathrm{C}_6 \mathrm{H}_6 \xrightarrow[\substack{\text{(ii) NaOH} \\ \text{(iii) H^+}}]{\text{(i) Oleum}} & P & \text { Pentan-2-ol. } \\ \hline B & \text{Butanal } \xrightarrow[\text{(ii) } \mathrm{H}^+]{\text{(i) } \text{MeMgBr/ dry ether}} & Q & \text { 2-Hydroxybenzoic acid. } \\ \hline C & \text {2-Methylpropene } \xrightarrow[\text { (ii) } \mathrm{H}_2 \mathrm{O}_2 / \mathrm{NaOH}]{\text { (i) } \mathrm{B}_2 \mathrm{H}_6} & R & \text { Phenol } \\ \hline D & \text{Phenol } \xrightarrow[\text { (ii) } \mathrm{CO}_2, 400 \mathrm{~K}, 7 \mathrm{~atm} .]{\text { (i) } \mathrm{NaOH}} & S & \text { 2-Methylpropan-1-0 I } \\ \hline \end{array}\)

The maximum number of hydrogen bonds that a molecule of water can have is

Given below are 4 equations showing Molar conductivities at infinite dilution of various electrolytes. Which one of them represents the correct equation?
\(\begin{aligned}
& \left(\Lambda_m^0\right)_{N a B r}-\left(\Lambda_m^0\right)_{N a C l}=\left(\Lambda_m^0\right)_{\mathrm{KCl}}-\left(\Lambda_m^0\right)_{\mathrm{KBr}} \\
& \left(\Lambda_m^0\right)_{\mathrm{HCl}}+\left(\Lambda_m^0\right)_{\mathrm{KOH}}-\left(\Lambda_m^0\right)_{\mathrm{KCl}}=\left(\Lambda_m^0\right)_{\mathrm{H}_2 \mathrm{O}} \\
& \left(\Lambda_m^0\right)_{\mathrm{KBr}}-\left(\Lambda_m^0\right)_{\mathrm{NaBr}}=\left(\Lambda_m^0\right)_{\mathrm{NaBr}}-\left(\Lambda_m^0\right)_{\mathrm{Nal}} \\
& \left(\Lambda_m^0\right)_{N H_4 \mathrm{Cl}}-\left(\Lambda_m^0\right)_{\mathrm{NH}_4 \mathrm{NO}_3}=\left(\Lambda_m^0\right)_{N H_4 \mathrm{Cl}}-\left(\Lambda_m^0\right)_{N H 4 B r}
\end{aligned}\)

If 2 moles of \(\mathrm{C}_6 \mathrm{H}_6(\mathrm{~g})\) are completely burnt \(4100 \mathrm{~kJ}\) of heat is liberated. If \(\Delta H^{\circ}\) for \(\mathrm{CO}_2(\mathrm{~g})\) and \(\mathrm{H}_2 \mathrm{O}(l)\) are \(-410\) and \(-285 \mathrm{~kJ}\) per mole respectively then the heat of formation of \(\mathrm{C}_2 \mathrm{H}_6(g)\) is

One mole of an ideal gas for which \(C_V=\frac{3}{2} R\) is heated reversibly at constant pressure of 1 atm from \(25^{\circ} \mathrm{C}\) to \(100^{\circ} \mathrm{C} . \Delta H\) will be

Given are the following molecules.
\(\mathrm{H}_3 \mathrm{PO}_2, \mathrm{H}_3 \mathrm{PO}_3, \mathrm{H}_3 \mathrm{PO}_4, \mathrm{H}_4 \mathrm{P}_2 \mathrm{O}_7\)
Which of the above oxoacids results into two series of salt?

Consider the following list of ordered pairs: \((1, 0), (-2, -1), (7, -6), (-3, 4)\) and \((0, 2)\)
Which of the following options correctly identifies only those pairs that are NOT elements of the relation \(R = \{(x, y) : y = 1 - |x|\,;\, x, y \in \mathbb{Q}\}\)?

............ is unstable at cooking temperature, whereas the control of sweetness of food is difficult while using .........

If two sets \(A\) and \(B\) have 99 elements in common, then the number of elements common to the sets \(A \times B\) and \(B \times A\) is

The argument of the complex number \(\sin \left(\frac{6 \pi}{5}\right)+i\left(1+\cos \frac{6 \pi}{5}\right)\) is

The density of a gas is \(1.964 \mathrm{~g} \mathrm{dm}^{-3}\) at \(273 \mathrm{~K}\) and \(76 \mathrm{~cm}\) Hg. The gas is

A transition metal M forms 4 homoleptic octahedral coordination compounds, A, B, C and D of the type [MX6] \({ }^{z-}\) with monodentate ligands \(\mathrm{a}, \mathrm{b}, \mathrm{c}\) and d respectively. These compounds absorb red, blue, yellow and blue-green light respectively. Which one of the options shows the correct order of decreasing ligand strength?