Question

a solid X when heated give rise to a solid Y and a brown gas R.
(a) write chemical name and chemical formula of solid X
(b) write chemical name and chemical formula of solid Y.
(c) write chemical name and chemical formula of Brown gas R. (d) write chemical equation.

Answer 1

X= PbNO3
Y= PbO
R=NO2
The answer is as follows Hope it helps

Answer 2

When lead nitrate is heated,thermal decomposition takes place and lead oxide , oxygen gas and brown fumes of nitrogen are formed.
therefore answer,

a)lead nitrate ($Pb(N O_{3}) _{2}$)
b)lead oxide ($PbO$)
c)nitogen gas($NO_{2}$)
d)$2Pb(N O_{3} ) _{2} = 2PbO+4N O_{2} + O_{2}$

HOPE THIS HELPS...PLZ MARK AS BRAINLIEST..!