What is the slag formed in the extraction of iron?

In the reaction,
\(\mathrm{C}_2 \mathrm{H}_5 \mathrm{OC}_2 \mathrm{H}_5+\mathrm{CO} \underset{150^{\circ} \mathrm{C}, 500 \text { atm pressure }}{\stackrel{\mathrm{BF}_3}{\longrightarrow}} X\)
What is \(X\) ?

As per molecular orbital theory the pair of molecules which do not exist is

Ethane on heating with a regulated supply of air at high pressure in presence of manganese acetate forms 'Q', 'Q' is

Among the gases $\mathrm{a}, \mathrm{b}, \mathrm{c}, \mathrm{d}, \mathrm{e}$ and $\mathrm{f}$, the gases that show only positive deviation from ideal behavior at all pressures in the graph are

The types of hybrid orbitals of nitrogen in \(\mathrm{NO}_2^{+}, \mathrm{NO}_3^{-}\)and \(\mathrm{NH}_4^{+}\)respectively are

Observe the following statements :
a. The thermal stability of hydrides of group 16 elements follow the order :
\(\mathrm{H}_2 \mathrm{O}>\mathrm{H}_2 \mathrm{~S}>\mathrm{H}_2 \mathrm{Se}>\mathrm{H}_2 \mathrm{Te}\)
b. Acidic nature of hydrides of group 16 elements follow the order :
\(\mathrm{H}_2 \mathrm{O}>\mathrm{H}_2 \mathrm{~S}>\mathrm{H}_2 \mathrm{Se}>\mathrm{H}_2 \mathrm{Te}\)
c. The reducing nature of \(\mathrm{H}_2 \mathrm{~S}, \mathrm{H}_2 \mathrm{Se}\) and \(\mathrm{H}_2\) Te follow the order :
\(\mathrm{H}_2 \mathrm{~S} < \mathrm{H}_2 \mathrm{Se} < \mathrm{H}_2 \mathrm{Te}\)
The correct statement are:

In Young's double slit experiment the slits are \(3 \mathrm{~mm}\) apart and are illuminated by light of two wavelengths \(3750 Å\) and \(7500 Å\). The screen is placed at \(4 \mathrm{~m}\) from the slits. The minimum distance from the common central bright fringe on the screen at which the bright fringe of one interference pattern due to one wavelength coincide with the bright fringe of the other is

If the area bounded by the parabola \(y^2=16 a x\) and the line \(y=4 m x\) is \(\frac{a^2}{12}\) sq. units, then the value of ' \(m\) ' is

Suppose \(t_n\) is the number of triangles formed using the vertices of a regular polygon of \(n\) sides. If \(t_{n+1}=t_n+28\), then \(n=\)

If \(\int \frac{d x}{x^{2022}\left(1+x^{2022}\right)^{1 / 2022}}=\frac{-\left(1+x^m\right)^{n / m}}{n x^n}+C\), then \(\mathrm{m}-\mathrm{n}=\)

The differential equation \(\frac{d y}{d x}=\frac{1}{a x+b y+c}\), where \(a, b, c\) are all non-zero real numbers, is

\(A\) and \(B\) are independent events of a random experiment if and only if