What happens when quicklime is heated with silica

what happens when
a) quick lime is heated with silica
b)Chlorine reacts with slaked lime
c)calcium nitrate is heated?

  1. Quicklime is heated with silica to give calcium silicate.
  2. Chlorine reacts with slaked lime to form sodium hypochlorite and calcium chloride.
  3. When calcium nitrate is heated, white colour calcium oxide is formed along with it reddish brown gas known as nitrogen dioxide is given out accompanied with oxygen gas