Question

Study the diagram below and answer the questions that follow

1. Write a chemical equation for the reaction in tube A 
2. Name the two salts formed in tube B
3. State the observation made in tube C 
4. What is the purpose of potassium hydroxide in tube D. 
5. Name gas P 

Answer 1

1.    
   •                           Heat                        
     2 Pb (NO₃)_2(S)   →    2 PbO_(s) +4 NO_{2 (g)} + O2
2.    
   • Sodium nitrite
   • Sodium nitrate 
3. Charcoal glow red hot 
4. To absorb Carbon (IV) oxide gas formed
5. Carbon (II) oxide gas