group 2 and 7

Question 1

write the equation and conditions required for chlorine to make bleach

Answer 1

Cl2 + 2NaOH -> NaCl + NaClO +H20

dilute cold NaOH

Question 2

write the equation of the thermal decomposition of Calcium carbonate

Answer 2

CaCO3(s) -> CaO(s) + CO2 (g)

Question 3

which group2 carbonate decomposes at the highest temperature

Answer 3

BaCO3 or RaCO3

Question 4

Barium nitride is reacted with water, forming an alkaline solution and an alkaline gas. write the equation

Answer 4

Ba3N2 + 6H2O->3Ba(OH)2 + 2NH3

Question 5

solid carbon exists in two forms, diamond and graphite.
Explain why it is unnecessary to refer to carbon as either diamond or graphite

Answer 5

Diamond and graphite form gaseous atoms of carbon when they are ionised so they are in their gaseous state