Starting with labelled BaCO 3 ( containing C 14 , how would you prepare labelled Na 2 CO 3 , CaCO 3 , CaC 2 , CaNCN , C 2 H 2 , CH 3 OH , CS 2 and Ni ( CO ) 4 ?

1 ) Sodium Carbonate and Calcium Carbonate can be generated by the decomposition of Barium Carbonate that releases CO 2 , which further reacts with sodium hydroxide and Lime Water to give Sodium Carbonate and Calcium Carbonate, respectively. BaCO 3 → 600 K BaO + CO 2 CO 2 + NaOH → Na 2 CO 3 + H 2 O CO 2 + Ca ( OH ) 2 → CaCO 3 + H 2 O . 2 ) Calcium Carbide can be formed from heating of Lime Stone with Coke CaCO 3 → CaO + CO 2 CaO + 2 C → 2000 ° C CaC 2 + CO 3 ) Now, CaC 2 reacts with N 2 to give Calcium Cyanamide, ie., CaNCN . CaC 2 + N 2 → CaNCN + C 4 ) Calcium Carbide reacts with Water to produce Acetylene gas. CaC 2 + 2 H 2 O → Ca ( OH ) 2 + C 2 H 2 5 ) Methanol can be prepared by reaction of Carbon dioxide with H 2 . CO 2 + 3 H 2 → CH 3 OH + H 2 O 6 ) Coke obtained can be treated with S to give CS 2 . C + 2 S → CS 2 6 ) Nickel tetra carbonyl can be prepared by treating CO with Ni . Ni + 4 CO → Ni ( CO ) 4