One mole of 1,2-dibromopropane on treatment with X moles off `NaNH_(2)` followed by treatment with ethyl bromide gave a 2-pentyne. The value of X is

1,4-Pentadiene reacts with excess of HCl in the presence of benzoyl peroxide to give compound X , which upon reaction with excess of Mg in dry ether forms Y . Compound Y on treatment with ethyl acelate followed by treatment with dilute acid yields Z . Identify the structure of componds. X, Y and Z .

Gem dihalides on treatment with alcoholic KOH followed by action of NaNH_(2) gives:

One mole of CO_(2) contains:

1 - Bromo -2, 2 - dimethylcyclohexane on treatment with methanol gives

Bromobenzene on treatment with fuming H_(2)SO_(4) gives a compound which one treatment with Cl_(2)//AlCl_(3) gives (A), (A) on distillation with dil. H_(2)SO_(4) gives (B). (B) on treatment with an eq. of Mg in dry ether gives (C ). (C ) on treatment with CH_(3)CHO followed by hydrolysis gives (D). (D) on treatment with NaOl gives (E). Identify the structures of (A) to (E).

6 mole of FeC_2 O_4 on treatment with 2 mole of K_2 Cr_2 O_7 in acidic medium evolves x litre of CO_2 gas at STP. The value of x would be:

Treatment of benzene with "CO"//HCl in the presence of anhydrous AlCl_(3)//CuCl followed by reaction with Ac_(2)"O"//NaOAc gives a compound X. Reaction of X with H_(2)//Pd//c followed by treatment with H_(3)PO_(4) gives another compound Y. The compound Y is :

Compound (A) does not react with Tollens or Grignard reagent, but after treatment with NaNH_2 , it gives the above test. The compound (A) is/are: