Question

1.Burning carbon-rich compounds in a limited supply of air

1 point

a)soot

b)bone charcoal

c)diamond

2.Water gas is mixture of carbon monoxide and hydrogen

1 point

a) True

b) False

c) None of these

3.The symbol of lead is

1 point

Mn

Pb

Mg

4.The chemical formula of nitric acid is

1 point

a) HCL

b) HNO3

c)H2O​

Answer 1

1. b)

2. false

3.Pb

4. HNO₃

Answer 2

Answer:

1. Bone charcoal

2.True

3.Pb

4. option wrong (NO³) answer correct