Action of hydrogen on litmus is
acidic
neutral
basic
not predictable
Oxidation is the process of
addition of oxygen
removal of oxygen
addition of O3
addition of carbon
Which of the following is the lightest known element?
Hydrogen
Helium
Lithium
Neon
On Haber process, which of these gas is releasing?
Sodium choride
Ammonia
Methane
Zinc chloride
H2 + S → ?
H2S
HS
2HS
H2SO4
Complete the reaction2H2 + O2 → ?
2HO + heat
H2O + heat
2H2O + heat
HO2 + heat
Complete the reaction
2Na + H2 → ?
2NaH
Na2H
NaH2
NaH
Valency of hydrogen is
3
2
1
5
Substance which alter the rate of chemical reaction is
oxidizing agent
catalyst
reducing agent
none of these
The hydrogen gas is how many times lighter than air?
1000
100
10
20
