1. Dry hydrogen was passed over heated lead (II) oxide as shown. Lead (11) oxide
Flare
Dry
hydrogen
I
Jat
Heat
Combustion tube
a) Before lighting hydrogen gas at the jet, it is important to drive off all the air in the
combustion tube. Explain
b) State what would be observed in the boat containing lead ii oxide. Write equation
c) Why should excess hydrogen be burned and not allowed to escape into the
atmosphere?
d) Why should the supply of hydrogen continue until the apparatus cools?
e) Name product formed at the flame
f) Why is it important to clamp the glass tube in slanting position?
​