0.0852g of an organic halide (A) when dissolved in 2.0g of camphor, the melting point in the mixture was found to be 167^(@)C. Compound (A) when heated with sodium gives a gas (B). 280mL of gas (B) at STP weight 0.375g. What would be 'A' in the whole process? K_(f) for comphor=40, m.pt. of camphor=179^(@)C.

0.0852g of an organic halide (A) when dissolved in 2.0g of camphor, th

1.	0.0852g of an organic halide (A) when dissolved in 2.0g of camphor, the melting point in the mixture was found to be 167^(@)C. Compound (A) when heated with sodium gives a gas (B). 280mL of gas (B) at STP weight 0.375g. What would be 'A' in the whole process? K_(f) for comphor=40, m.pt. of camphor=179^(@)C.
Answer» `C_2H_5Br` `CH_3I` `(CH_3)_2CHI` `C_3H_7Br` Solution :`DeltaT=179-167=12, w=0.0852g, W=2g, K_f`=40, molecular WEIGHT of (A) `=(1000xxK_fxxw)/(DeltaTxxW)=(1000xx40xx0.0852)/(12xx2)=142` (A) undergoes Wurtz REACTION to form (B) i.e. `(A) overset(Na)to(B)+NaX` (B)is an ALKANE say `C_nH_(2n+2)` `:'` 280 mL of (B) weighs 0.375 g at NTP `:.` 22400 mL of (B) weighs `=(0.375xx22400)/280` = 30 g at NTP `:.` M.wt. of (B) =30,12n+2n+2n+2=30,n=2 Thus (B) si ethane and THEREFORE (A) is `CH_3X`. The m.wt.of `CH_3X=142` At. wt. of X = 127 `:.` X is iodine Therefore alkyl ahlide is `CH_3I`. This reaction is `underset((A))(2CH_3I)underset("either")overset(Na)tounderset((B))(C_2H_6)`