Arrange the following compounds in increasing order of rate of aromatic electrophilic substitution reaction

The correct order of electron gain enthalpy is

The electrode potential of \(M ^{2+} / M\) of \(3 d-\) series elements shows positive value of

A short peptide on complete hydrolysis produces \(3\) moles of glycine \((G)\), two moles of leucine \((L)\) and two moles of valine \((V)\) per mole of peptide. The number of peptide linkages in it are \(..............\).

The energy of one mole of photons of radiation of wavelength \(300 nm\) is ...... \(kJ \,mol ^{-1}\).  (Given : \(h =6.63 \times 10^{-34} \,Js , N _{ A }=6.02 \times 10^{23} \,mol ^{-1}\), \(c =3 \times 10^{8}\, ms ^{-1}\) )

In which of the following reactions \(H_2O_2\) acts as a reducing agent ?

Which among the above compound/s does/do not form Silver mirror when treated with Tollen's reagent?

For the reaction, \( N_{2}O_{4}\rightleftharpoons 2NO_{2}, \) graph is plotted as shown below. Identify correct statements.
A. Standard free energy change for the reaction is -5.40 kJ mol⁻¹.
B. As \( \Delta G^{\ominus} \) in graph is positive, \( N_{2}O_{4} \) will not dissociate into \( NO_{2} \) at all.
C. Reverse reaction will go to completion.
D. When 1 mole of \( N_{2}O_{4} \) changes into equilibrium mixture, value of \( \Delta G^{\ominus}=-0.84 \, kJ \, mol^{-1} \).
E. When 2 mole of \( NO_{2} \) changes into equilibrium mixture, \( \Delta G^{\ominus} \) for equilibrium mixture is -6.24 kJ mol⁻¹.

Choose the correct answer from the options given below:

Let \(K\) be the sum of the coefficients of the odd powers of \(x\) in the expansion of \((1+ x )^{99}\). Let a be the middle term in the expansion of \(\left(2+\frac{1}{\sqrt{2}}\right)^{200}\). If \(\frac{{ }^{200} C _{99} K }{ a }=\frac{2^{\ell} m }{ n }\), where \(m\) and \(n\) are odd numbers, then the ordered pair \((l, n )\) is equal to :

For a triangle \(ABC\), the value of \(\cos 2 A +\cos 2 B +\cos 2 C\) is least. If its inradius is \(3\) and incentre is \(M\), then which of the following is NOT correct?

Using monochromatic light of wavelength \(\lambda \), an experimentalist sets up the Young 's double slit experiment in three ways as shown. If she observes that \(y = \beta '\), the wavelength of light used is.....\(nm\)

The least positive integer \(\mathrm{n}\) such that \(\frac{(2 \mathrm{i})^{\mathrm{n}}}{(1-\mathrm{i})^{\mathrm{n}-2}}, \mathrm{i}=\sqrt{-1}\) is a positive integer, is ..... .

A cylindrical conductor of length 2m and area of cross-section \( 0.2\,mm^{2} \) carries an electric current of 1.6 A when its ends are connected to a 2V battery. Mobility of electrons in the conductor is \( \alpha\times10^{-3} m^{2}/V.s \). The value of \( \alpha \) is:
(electron concentration \( =5\times10^{28}/m^{3} \) and electron charge \( =1.6\times10^{-19} C \))