| List-I (Processes/ Reactions) | List-II (Catalyst) |
|---|---|
| (A) \(2SO_2(g) + O_2(g)\) | (I) \(\underrightarrow {Fe(s)}\ \ 2SO_3(g)\) |
| (B) \(4NH_3(g) + 5O_2(g)\) | (II) \(\underrightarrow {Pt(s) – Rh(s)}\ \ 4NO(g) + 6H_2O(g)\) |
| (C) \(N_2(g) + 3H_2(g)\) | (III) \(\underrightarrow {V_2O_5}\ \ 2NH_3(g)\) |
| (D) Vegetable oil \((l)+ H_2\) | (IV) \(\underrightarrow {Ni(s)}\) Vegetable ghee(s) |
(A) \(2SO_2(g) + O_2(g) \xrightarrow{V_2O_5}2SO_3\)
(B) \(4NH_3(g) + 5O_2(g)\xrightarrow{Pt(s)-Rh(s)}4NO(g)+6H_2O(g)\)
(C) \(N_2(g) + 3H_2(g) \xrightarrow{Fe(s)}2NH_3(g)\)
(D) Vegetable oil (l) \(+ H_2 \xrightarrow{Ni(s)}\) Vegetable ghee(s)
So, the correct option is (B): (A)-(III), (B)-(II), (C)-(I), (D)-(IV).
Given below are two statements regarding conformations of n-butane. Choose the correct option. 
Consider a weak base \(B\) of \(pK_b = 5.699\). \(x\) mL of \(0.02\) M HCl and \(y\) mL of \(0.02\) M weak base \(B\) are mixed to make \(100\) mL of a buffer of pH \(=9\) at \(25^\circ\text{C}\). The values of \(x\) and \(y\) respectively are
Let \( \alpha = \dfrac{-1 + i\sqrt{3}}{2} \) and \( \beta = \dfrac{-1 - i\sqrt{3}}{2} \), where \( i = \sqrt{-1} \). If
\[ (7 - 7\alpha + 9\beta)^{20} + (9 + 7\alpha - 7\beta)^{20} + (-7 + 9\alpha + 7\beta)^{20} + (14 + 7\alpha + 7\beta)^{20} = m^{10}, \] then the value of \( m \) is ___________.
A coordination compound holds a central metal atom or ion surrounded by various oppositely charged ions or neutral molecules. These molecules or ions are re-bonded to the metal atom or ion by a coordinate bond.
A coordination entity composes of a central metal atom or ion bonded to a fixed number of ions or molecules.
A molecule, ion, or group which is bonded to the metal atom or ion in a complex or coordination compound by a coordinate bond is commonly called a ligand. It may be either neutral, positively, or negatively charged.