What happens when:
(i) calcium is treated with nitrogen.
(ii) calcium is treated with dilute sulphuric acid.
(iii) calcium is heated in the atmosphere of 
.
(iv) calcium is treated with cold water.
Answers
(1) when calcium is treated with nitrogen it forms calcium nitride whose equation is Ca3N2.
(2) Calcium reacts with dilute hydrochloric acid to give calcium chloride and hydrogen gas. Calcium hydroxide, Ca(OH)2 or slaked lime or hydrated lime, is a caustic substance produced by heating limestone at high temperature (above 825 °C)
(3) It burns in air or pure oxygen to form the oxide and reacts rapidly with warm water (and more slowly with cold water) to produce hydrogen gas and calcium hydroxide.
(4) When calcium is dropped into cold water, it reacts vigorously (although not as vigorously as Na or K) to form milky Calcium Hydroxide and Hydrogen gas, along with release of heat.
Answer:
Explanation:
(1) when calcium is treated with nitrogen it forms calcium nitride whose equation is Ca3N2.
(2) Calcium reacts with dilute hydrochloric acid to give calcium chloride and hydrogen gas. Calcium hydroxide, Ca(OH)2 or slaked lime or hydrated lime, is a caustic substance produced by heating limestone at high temperature (above 825 °C)
(3) It burns in air or pure oxygen to form the oxide and reacts rapidly with warm water (and more slowly with cold water) to produce hydrogen gas and calcium hydroxide.
(4) When calcium is dropped into cold water, it reacts vigorously (although not as vigorously as Na or K) to form milky Calcium Hydroxide and Hydrogen gas, along with release of heat.