Find out time period of Ist order reaction. When reaction complete $$2 / 3 \mathrm{rd}$$. If the value of rate constant is $$4.3 \times 10^{-4}$$
Compare stability of free radicals
(I) $$\mathrm{CH}_3-\mathop C\limits^ \bullet H-\mathrm{CH}_3$$
(II) 
(III) $$\mathop C\limits^ \bullet {H_2}-\mathrm{CH}\left(\mathrm{CH}_3\right)_2$$
(IV) $$\mathop C\limits^ \bullet {H_2}-\mathrm{CH}_3$$

Find out the products of reaction
If boiling point of water is $$100^{\circ} \mathrm{C}$$. How much gram of $$\mathrm{NaCl}$$ is added in $$500 \mathrm{~g}$$ of water to increase its boiling point of water by approx $$1^{\circ} \mathrm{C}\left(K_b\right)_{\mathrm{H}_2 \mathrm{O}}=0.52 \mathrm{~K} \times \mathrm{kg} /$$ mole.
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