9.Which of the following gas(es) can be collected with a tank of water in experiments ?
(1)Methane
(2)Nitrogen oxide
(3)Nitrogen dioxide
A.(1) only
B.(1) and (2) only
C.(2) and (3) only
D.(1), (2) and (3)
nitrogen oxide 即係指所有有Natom 的oxide?
點解許呢條題目,nitrogen oxide 可以
collected with a tank of water in experiments ?
ans:B