3.
N04/4/7. (a) (i) Write a symbol equation for the action of heat on zinc hydroxide.
[2]
•(ii) Describe what
happens when solid sodium hydroxide is heated strongly. [1]
–
–
–(b) What would be
observed when copper(II) nitrate is heated? [3]
–
–
4. J03/3/4.
Nitrogen dioxide, NO2, is a dark brown gas.
–(a) Most metal
nitrates decompose when heated to form the metal oxide, nitrogen
dioxide and oxygen.