Arrange the following in increasing order of acidic charater.

Assertion (A) Propene on addition with hydrogen bromide in the presence of peroxide gives 1-bromopropane as the major product.
Reason (R) l-bromopropane is the major product because it is formed through the stable carbocation.
The correct answer is

From the following data
\[
\begin{aligned}
& \mathrm{CH}_3 \mathrm{OH}(l)+\frac{3}{2} \mathrm{O}_2(g) \longrightarrow \mathrm{CO}_2(g)+2 \mathrm{H}_2 \mathrm{O}(l) \\
& \Delta_r H^{\circ}=-726 \mathrm{~kJ} \mathrm{~mol}^{-1} \\
& \mathrm{H}_2(g)+\frac{1}{2} \mathrm{O}_2(g) \longrightarrow \mathrm{H}_2 \mathrm{O}(l) \text {; } \\
& \Delta_r \mathrm{H}^{\circ}=-286 \mathrm{~kJ} \mathrm{~mol}^{-1} \\
& \mathrm{C}(\text { graphite })+\mathrm{O}_2(\mathrm{~g}) \longrightarrow \mathrm{CO}_2(\mathrm{~g}) \text {; } \\
& \Delta_r \mathrm{H}^{\circ}=-393 \mathrm{~kJ} \mathrm{~mol}^{-1} \\
&
\end{aligned}
\]
The standard enthalpy of formation of \(\mathrm{CH}_3 \mathrm{OH}(l)\) in \(\mathrm{kJ} \mathrm{mol}^{-1}\) is

The experimentally determined molar mass of a non-volatile solute, \(\mathrm{BaCl}_2\) in water by Cottrell's method, is

What amount of conc. \(\mathrm{H}_2 \mathrm{SO}_4\) solution should be used to prepare \(500 \mathrm{~mL}\) of \(0.5 \mathrm{M} \mathrm{H}_2 \mathrm{SO}_4\) ? (The concentration of \(\mathrm{H}_2 \mathrm{SO}_4\) solution being used is \(90 \%\) and molecular mass of \(\mathrm{H}_2 \mathrm{SO}_4=98.079 \mathrm{~g} \mathrm{~mol}^{-1}\) )

Arrange the following in the correct order of their bond orders.

The alloy that contains copper and Zn is \(x\) and the one that contains copper and Ni is \(y\). What are \(x\) and \(y\) respectively?

Which of the following reactions is an example of roasting ?

If \(f(x)=\left|\begin{array}{ccc}2 \cos x & 1 & 0 \\ x-\frac{\pi}{2} & 2 \cos x & 1 \\ 0 & 1 & 2 \cos x\end{array}\right|\) then \(f^{\prime}(\pi)\) is equal to

If a body cools from a temperature of \(62^{\circ} \mathrm{C}\) to \(50^{\circ} \mathrm{C}\) in 10 minutes and to \(42^{\circ} \mathrm{C}\) in the next 10 minutes, then the temperature of the surroundings is

What are X and Y in the following set of reactions?

On increasing temperature, the equilibrium constant of exothermic and endothermic reactions, respectively

A circle passing through origin cuts the coordinate axes is \(A\) and \(B\). If the straight line \(A B\) passes through a fixed point \(\left(x_1, y_1\right)\), then the locus of the centre of the circle is