Which of the following statement is incorrect?

The number of bond pairs, lone pairs present on the central atom of \(\mathrm{SF}_4\) molecule and its shape respectively are

Ferrous ion charges to \(X\) ion, on reacting with acidified hydrogen peroxide.
The number of \(d\)-electrons present in \(X\) and its magnetic moment (in BM) are, respectively :

The composition of a sample of wustite is \(\mathrm{Fe}_{0.93} \mathrm{O}_{1.00}\). Percentage of iron in the form of \(\mathrm{Fe}^{3+}\) ion is nearly

Which of the following molecules can be represented as \(A B_2 E_2\), where \(A\)-central atom, \(B\)-bond pairs of electrons, \(E\)-lone pairs of electrons?

The bond angle of bond in methoxy methane is

\(\mathrm{K}_{\mathrm{c}}\) for the following reaction is 99.0
\(\mathrm{A}_2(\mathrm{~g}) \stackrel{\mathrm{T}(\mathrm{~K})}{\rightleftharpoons} \mathrm{B}_2(\mathrm{~g})\)
In a one litre flask, 2 moles of \(\mathrm{A}_2\) was heated to \(\mathrm{T}(\mathrm{K})\) and the above equilibrium is reached. The concentrations at equilibrium of \(\mathrm{A}_2\) and \(\mathrm{B}_2\) are \(\mathrm{C}_1\left(\mathrm{~A}_2\right)\) and \(\mathrm{C}_2\left(\mathrm{~B}_2\right)\) respectively. Now, one mole of \(\mathrm{A}_2\) was added to flask and heated to \(\mathrm{T}(\mathrm{K})\) to establish the equilibrium again. The concentrations of \(\mathrm{A}_2\) and \(\mathrm{B}_2\) are \(\mathrm{C}_3\left(\mathrm{~A}_2\right)\) and \(\mathrm{C}_4\left(\mathrm{~B}_2\right)\) respectively. What is the value of \(\mathrm{C}_3\left(\mathrm{~A}_2\right)\) in \(\mathrm{mol}^{-1}\) ?

In \(\triangle A B C\) if \(x=\tan \left(\frac{B-C}{2}\right) \tan \frac{A}{2}\), \(y=\tan \left(\frac{C-A}{2}\right) \tan \frac{B}{2}\), and \(z=\tan \left(\frac{A-B}{2}\right) \tan \frac{C}{2}\), then \((x+y+z)\) is equal to

The value of \(\lim _{\substack{n \rightarrow \infty}} \frac{1}{n^3} \sum_{k=1}^n\left(k^2 x\right)\) is

If \(\mathbf{a}=2 \hat{\mathbf{i}}+\hat{\mathbf{j}}-3 \hat{\mathbf{k}}\) and \(\mathbf{b}=3 \hat{\mathbf{i}}-\hat{\mathbf{j}}+2 \hat{\mathbf{k}}\), then find the angle between the vectors \(2 \mathbf{a}+\mathbf{b}\) and \(\mathbf{a}+2 \mathbf{b}\).

A body of mass ' \(M\) ' is moving with a uniform speed of ' \(v\) ' on a frictionless horizontal surface under the influence of two forces \(F_1\) and \(F_2\) as shown in the figure. The net power of the system is

A part of a circuit is shown in the figure. The ratio of the potential differences between the points A and C, and the points D and E is

If the circle \(S \equiv x^2+y^2+2 g x+4 y+1=0\) bisects the circumference of the circle \(\mathrm{x}^2+\mathrm{y}^2-2 \mathrm{x}-3=0\), then the radius of circle \(\mathrm{S}=0\) is