When `H_(2)` and CO are reacted in presence of Cu catalyst, the product /s obtained is /are :

When acetylen reacted with hydroxylic acid in presence of HgCl_(20 the product obtained is

When acetylene reacts with hydrochloric acid in presence of mercuric chloride, the product obtained is :

Cl_(2) reacts with CS_(2) in presence of I_(2) catalyst to form

When carbon monooxide reacts with hydrogen in presence of Ni catalyst producing

When bezoyl chloride si reduced by H_(2) in the presence of Pd catalyst, the product is benzyl alcohol. If BaSO_(4) is mixed with the catalyst before passing the gas, the product is benzaldehyde. Assign reason.

When ethyl alcohol (C_(2) H_(5) OH) reacts with thionyl chloride in the presence of pyridine the product obtained is .

When ethyl alcohol (C_(2) H_(5) OH) reacts with thionyl chloride in the presence of pyridine the product obtained is .