Question

write one reaction for each of the following

a) evolution of a gas
b) formation of precipitate
c) change in colour
d) evolution of heat ​

Answer 1

Answer:

a) 2Na + 2H2O --------> 2NaOH + H2

b) 3BaCl2 + Al2(SO4)3 ------> 3BaSO4↓ + 2AlCl3

c) Pb(NO3)2 + Heat --------> PbO + NO2 + O2

d) CaO + H2O ---------> Ca(OH)2 + Heat