Question

science
std 9
answer me please​

Answer 1

Answer:

A) when the labourer enters the manhole immediately the gases present in the sewage may make him unconscious or put him to death when he breathe .

B) The amin gases released from the manhole are 1 .hydrogen sulfide (H2S)

2 .carbon dioxide (CO2)

3 .methane (CH4)

4 .ammonia (NH3).

C) I don't know

Answer 2

Answer:

I hope this helps you

Explanation:

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