Consider the below reaction and identify the missing reagent/chemical.
\(\mathrm{CH_{3}CH_{2}COO^{-}Na^{+} \ \xrightarrow[\textbf{Heat}]{\textbf{NaOH, + ? }} \ CH_{3}CH_{3} \ + \ Na_{2}CO_{3}}\)

1. CaO

2. DIBAL-H

3. B₂H₆

4. Red Phosphorus

Which molecule among the following is non-polar?

Match Column-I with Column-II, Columns I and II represent complexes and magnetic moment (BM) respectively. 

Choose the correct answer from the options given below:

The correct option for the value of vapour pressure of a solution at 45 $°$C with benzene to octane in a molar ratio 3:2 is:

[At 45 $°$C vapour pressure of benzene is 280 mm Hg and that of octane is 420 mm Hg. Assume Ideal gas]

The reagent 'R' in the given sequence of a chemical reaction is : 

	List-I (Substrates of reactions)		List II (Name of reactions)
(a)		(i)	Hell-Volhard- Zelinsky reaction
(b)		(ii)	Gattermann- Koch reaction
(c)		(iii)	Haloform reaction
(d)		(iv)	Esterification

Choose the correct answer from the options given below:

The molar conductivity of 0.007 M acetic acid is 20 S cm² mol^–1. The dissociation constant of acetic acid is :

(\(\mathrm{\Lambda_{H^{+}}^{o} \ = \ 350 \ S \ cm^{2} \ mol^{-1} }\))
(\(\mathrm{\mathrm{\Lambda_{CH_{3}COO^{-}}^{o} \ = \ 50 \ S \ cm^{2} \ mol^{-1} }}\))

1. $1.75\times {10}^{-5}$ mol L^–1 

2. $2.50\times {10}^{-5}$ mol L^–1 

3. $1.75\times {10}^{-4}$ mol L^–1 

4. $2.50\times {10}^{-4}$ mol L^–1 

The slope of Arrhenius Plot (ln k v/s $\frac{1}{\mathrm{T}}$) of the first-order reaction is $-5\times {10}^3$ $\mathrm{K}$. The value of E_a of the reaction is:

[Given R = 8.314 JK^–1 mol^–1]

The product formed in the following chemical reaction is:

1.
2.
3.
4.

The intermediate compound 'X' in the following chemical reaction is :

1.		2.
3.		4.