Question

CALCium does not combine directly with ................. A.Oxygen B.Nitrogen C.Hydrogen D.Carbon

Answer 1

B. Nitrogen is the answer.

Answer 2

Calcium does not combine directly with D) Carbon.

It reacts directly with Oxygen to form Calcium Oxide (CaO), it reacts directly with Nitrogen to form Calcium Nitride $\bold{\left(C a_{3} N_{2}\right)}$, it reacts directly with Hydrogen to form Calcium Hydride $\bold{\left(\mathrm{CaH}_{2}\right)}$.

Calcium reacts only with oxides of carbon and/or any carbonates of metals and/or also with bicarbonates of metals to produce new products and not directly with elementary carbon.