\(\mathrm{Cu}^{+}\) undergoes disproportionation, according to the equation,
\(
2 \mathrm{Cu}^{+} \rightleftharpoons \mathrm{Cu}^{2+}+\mathrm{Cu}
\)
The \(\mathrm{E}^{\circ}\) value for the reaction is:
\([\mathrm{E}_{\mathrm{Cu}^{2+} / \mathrm{Cu}}^{\mathrm{o}}=0.34 \mathrm{~V} \text { and } \mathrm{E}_{\mathrm{Cu}^{2+} / \mathrm{Cu}^{+}}^{\mathrm{O}}=0.15 \mathrm{~V}]\)

Which statement is incorrect about aminoacids?

Mohr's salt has the formula

Solubility product of a salt \(A B\) is \(1 \times 10^{-8}\) in a solution in which concentration of \(A\) is \(10^{-3} \mathrm{M}\). The salt will precipitate when the concentration of \(B\) becomes more than

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

Two statements, one Assertion (A) and the other Reason (R) are given. Choose the correct option.
Assertion: Compound \([\mathrm{X}]\) reacts with Hydrazine in presence of \(\mathrm{KOH} /\) Glycol to form the product \([\mathrm{Y}]\).

The \(\Delta\)G\(^o\) for the reaction, \(\text{Cd}^{2+}(aq) + \text{Zn}(s) \rightarrow \text{Zn}^{2+}(aq) + \text{Cd}(s)\) is:
\(\left[E^o_{\text{Cd}^{2+}/\text{Cd}} = -0.403,\ E^o_{\text{Zn}^{2+}/\text{Zn}} = -0.763\ V\right]\)

The order of acidic strength of boron trihalides is

If \(x+\frac{1}{x}=2 \cos \alpha\), then \(x^{n}+\frac{1}{x^{n}}\) is equal to

The total number of terms in \((x-y)^{20}+(x+y)^{20}\) is

The argument of \(\frac{4+3 i}{4-3 i}\) is

From the figure describing photoelectric effect we may infer correctly that

Newton's rings are observed normally in reflected light of wavelength \(5000 Å\). The diameter of the 10 th dark ring is \(0.005 \mathrm{~m}\). The radius of curvature of the lens is