The relative reactivity of 1^o H,2^o H,and 3^ | vedclass

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(A) Isobutane $CH_3-CH(CH_3)-CH_3$ contains $9$ primary $(1^o)$ hydrogens and $1$ tertiary $(3^o)$ hydrogen.Relative reactivity: $1^o H : 3^o H = 1 :

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$99.4\%, 0.6\%$

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(A) Isobutane $CH_3-CH(CH_3)-CH_3$ contains $9$ primary $(1^o)$ hydrogens and $1$ tertiary $(3^o)$ hydrogen.Relative reactivity: $1^o H : 3^o H = 1 : 1600$.Relative amount of product $(A)$ (from $3^o H$) $= 1 	imes 1600 = 1600$.Relative amount of product $(B)$ (from $1^o H$) $= 9 	imes 1 = 9$.Total relative amount $= 1600 + 9 = 1609$.$\% 	ext{ yield of } (A) = \frac{1600}{1609} 	imes 100 \approx 99.4\%$.$\% 	ext{ yield of } (B) = \frac{9}{1609} 	imes 100 \approx 0.6\%$.

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