Pls answer question 17 &18

Dear Student
The answer to question 17 is:

(a) C + O_{2} \to C O_{2} (b) E v o l u t i o n o f h y d r o g e n g a s E v o l u t i o n o f h e a t . Z n + H_{2} S O_{4} \to Z n S O_{4} + H_{2} (c) P b (N O

₃)2 + 2 KI →PbI2 + 2KNO3Charactersitics:Foramtion of yellow precipitate of PbI2Evolution of heat.
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