Which of the following name formula combinations is not correct ?                Formula

Sulphurous acid \(\left( H _{2} SO _{3}\right)\) has \(Ka _{1}=1.7 \times 10^{-2}\) and \(Ka _{2}=6.4 \times 10^{-8} .\) The \(pH\) of \(0.588 \,M\, H _{2} SO _{3}\) is ..... . (Round off to the Nearest Integer)

The number of paramagnetic metal complex species among \(\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}, \quad\left[\mathrm{Co}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]^{3-}\), \(\left[\mathrm{MnCl}_6\right]^{3-},\left[\mathrm{Mn}(\mathrm{CN})_6\right]^{3-},\left[\mathrm{CoF}_6\right]^{3-},\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3^{3-}}\) and \(\left[\mathrm{FeF}_6\right]^{3-}\) with same number of unpaired electrons is ________.

Consider the above sequence of reactions. The number of bromine atom(s) in the final product (P) will be:

Given below are two statements:
Statement I: Crystal Field Stabilization Energy (CFSE) of \([Cr(H_{2}O)_{6}]^{2+}\) is greater than that of \([Mn(H_{2}O)_{6}]^{2+}\).
Statement II: Potassium ferricyanide has a greater spin-only magnetic moment than sodium ferrocyanide.
In the light of the above statements, choose the correct answer from the options given below:

The reaction \(X \to Y\) is an exothermic reaction . Activation energy of the reaction for \(X\) into \(Y\) is \(150\,kJ\,mol^{-1}\) . Enthalpy of reaction is \(135\,kJ\,mol^{-1}\) . The activation energy for the reverse reaction, \(Y \to X\) will be.......\(kJ\,mol^{-1}\)

An aqueous \(\mathrm{KCl}\) solution of density \(1.20 \mathrm{~g} \mathrm{~mL}^{-1}\) has a molality of \(3.30 \mathrm{~mol} \mathrm{~kg}^{-1}\). The molarity of the solution in \(\mathrm{mol} \mathrm{L}^{-1}\) is ..... . (Nearest integer) [Molar mass of \(\mathrm{KCl}=74.5\) ]

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Consider a ferromagnetic material :
Assertion (A) : The individual atoms in a ferromagnetic material possess a magnetic dipole moment and interact with one another in such a way that they spontaneously align themselves forming domains.
Reason (R) : At high enough temperature, the domain structure of ferromagnetic material disintegrates. Thus, magnetization will disappear at high enough temperature known as Curie temperature.
In the light of the above statements, choose the correct answer from the options given below :

The magnetic field of an electromagnetic wave is given by \(\vec B = 1.6 \times {10^{ - 6}}\,\cos \,\left( {2 \times {{10}^7}z + 6 \times {{10}^{15}}t} \right)\left( {2\hat i + \hat j} \right)\frac{{Wb}}{{{m^2}}}\) The associated electric field will be

A microscope is focused on an object at the bottom of a bucket. If liquid with refractive index \(\frac{5}{3}\) is poured inside the bucket, then microscope have to be raised by \(30\,cm\) to focus the object again. The height of the liquid in the bucket is \(..........\,cm\)

\(\sum_{\mathrm{k}=0}^{20}\left({ }^{20} \mathrm{C}_{\mathrm{k}}\right)^{2}\) is equal to :

Let \(N\) denote the set of all natural numbers. Define two binary relations on \(N\) as \(R_1 = \{(x,y) \in  N \times  N : 2x + y= 10\}\) and \(R_2 = \{(x,y) \in  N\times  N : x+ 2y= 10\} \). Then

The rate constant of a reaction increases by five times on increase in temperature from \(27^{\circ} C\) to \(52^{\circ} C\). The value of activation energy in \(kJ mol ^{-1}\) is \(.... .\) (Rounded-off to the nearest integer) \(\left[ R =8.314\, J \,K ^{-1} \,mol ^{-1}\right]\)