Explain why both dextro and laevo forms of butan-2-ol are prepared in equal proportions when `S_(N)1` reaction of 2-chlorobutane is carried out in the presence of aqueous potassium hydroxide?

An organic compound (A) with molecular formula C_8H_8O forms an orange precipitate with 2, 4 dinitrophenyl hydrazine and gives yellow precipitate on heating with iodine in presence of sodium hydroxide. It neither reduces Tollen's reagent nor Fehling solution and it also does not decolourise bromine water or Baeyer's reagent. On drastic oxidation with chromic acid it gives a carboxylic acid (B) having molecular formula C_7H_6O_2 . Identify the compound (A) and (B) and explain in detail the reactions involved

A violet compound of manganese 'A' decomposes on heating to liberate oxygen and compounds B and C of manganese are formed. Compound C reacts with KOH in the presence of potassium nitrate to give a compound B. On heating compound C with conc. H_(2)SO_(4) and NaCl, chlorine gas is liberated and compound D of manganese alongwith other products is formed. Identify compounds A to D and also explain the reactions involved.

Out of S_(N)1 and S_(N)2 which reaction occurs with (a) inversion of configuration? (b) racemisation?

Which one undergoes S_(N)2 substitution reaction faster and why? 1-bromobutane and 2-bromobutane.

Although Cu^(+) does not exist is solution state , but CuCl (s) is formed in the presence of Cl^(-) ions in aqueous solution of Cu (s) and Cu^(2+) . Explain

The decomposition of N_2O_4 to NO_2 is carried out at 280 K in chloroform.When equiliberium has been established,0.2 mole of N_2O_4 and 2 xx 10^(-3) mole of NO_2 are present in a 2 litre solution. THE equiliberium constant for the reaction, N_2O_4 ⇌ 2NO_2 is :

Which one of the following pair undergo S_(N)1 reaction faster and why? CH_(2)=CHCHClCH_(3) Or CH_(3)CH_(2)CHClCH_(3)