
Given the reaction of N,N-dimethylaniline ('A') with NaNO2 and HX to form 'B', the correct statements are:
(1) The electrophile involved in the reaction is NO+.
(3) The reaction occurs at low temperature.
(4) The product 'B' formed in the above reaction is p-nitroso compound at low temperature.
Explanation:
* The reaction is a diazotization reaction specific to tertiary aromatic amines.
* NaNO2 and HX generate the nitrosonium ion (NO+), which is the electrophile.
* Diazotization reactions are performed at low temperatures to prevent decomposition of intermediates.
* The product formed is a p-nitroso compound due to electrophilic aromatic substitution at the para position.
Statement (2) is incorrect because the product is a p-nitroso compound, not an N-nitroso ammonium compound.
What will be the equilibrium constant of the given reaction carried out in a \(5 \,L\) vessel and having equilibrium amounts of \(A_2\) and \(A\) as \(0.5\) mole and \(2 \times 10^{-6}\) mole respectively?
The reaction : \(A_2 \rightleftharpoons 2A\)

Cobalt chloride when dissolved in water forms pink colored complex $X$ which has octahedral geometry. This solution on treating with cone $HCl$ forms deep blue complex, $\underline{Y}$ which has a $\underline{Z}$ geometry $X, Y$ and $Z$, respectively, are
What will be the equilibrium constant of the given reaction carried out in a \(5 \,L\) vessel and having equilibrium amounts of \(A_2\) and \(A\) as \(0.5\) mole and \(2 \times 10^{-6}\) mole respectively?
The reaction : \(A_2 \rightleftharpoons 2A\)
A black body is at a temperature of 2880 K. The energy of radiation emitted by this body with wavelength between 499 nm and 500 nm is U1, between 999 nm and 1000 nm is U2 and between 1499 nm and 1500 nm is U3. The Wien's constant, b = 2.88×106 nm-K. Then,