An aqueous solution of \(X\) on addition of hydrogen peroxide in ice cold conditions gives blue colour to the ethereal layer. Then, \(X\) can be

An organic compound is optically active if, it

Given are the names of 4 compounds. Two of these compounds will not undergo Cannizzaro's reaction. Identify the two.
A. 2-Chlorobutanal
B. 2,2-Dimethylpropanal
C. Benzaldehyde
D. 2-Phenyl ethanol

For a stable molecule the value of bond order must be

Choose the incorrect statement.

Which of the following is not aromatic?

Match the reactions in Column I with the correct products given in Column II:
\(\begin{array}{|l|l|l|l|} \hline \text{S.N.} & \text{Column I} & \text{S.No.} & \text{Column II} \\ \hline \text{A} & 1- \text{Chloropropane} + (\mathrm{Zn} / \mathrm{HCl}) \rightarrow & \text{P} & \text{Propanone + Methanal} \\ \hline \text{B} & n- \text{Hexane + (anh.} \left.\mathrm{AlCl}_3 / \mathrm{HCl}_{(\mathrm{g})}\right) \rightarrow & \text{Q} & \text{Propanone} \\ \hline \text{C} & 2- \text{Methylpropene} + ( \left.\mathrm{O}_3 ~\&~ \mathrm{Zn} / \mathrm{H}_2 \mathrm{O}\right) \rightarrow & \text{R} & \text{Propane} \\ \hline \text{D} & \text{Propyne} +\left(\mathrm{HgSO}_4 / \mathrm{H}_2 \mathrm{SO}_4\right. at 333 K) \rightarrow & \text{S} & \text{2-Methylpentane + 3-Methylpentane} \\ \hline \end{array}\)

For the reaction \(2 \mathrm{~N}_2 \mathrm{O}_5 \longrightarrow 4 \mathrm{NO}_2+\mathrm{O}_2\). If inital pressure is \(100 \mathrm{~atm}\) and rate constant \(k\) is \(3.38 \times 10^{-5} \mathrm{~s}^{-1}\). After \(20 \mathrm{~min}\) the final pressure of \(\mathrm{N}_2 \mathrm{O}_5\) will be

One end of the string of length \(l\) is connected to a particle of mass \(m\) and the other end is connected to a small peg on a smooth horizontal table. If the particle moves in circle with speed \(v\), the net force on the particle (directed towards centre) will be ( \(T\) represents the tension in the string)

A and B are two independent events. The probability of their simultaneous occurrence is \(\dfrac{1}{8}\) and the probability that neither of them occurs is \(\dfrac{3}{8}\). Then their individual probabilities are

Blue colour of sea water is due to

Which of the following technique is not used for measuring small time intervals?

\(\text { If } \dfrac{1}{2}\left(\dfrac{3 x}{5}+4\right) \geq \dfrac{1}{3}(x-6), x \in R \text { then }\)