defence exam Indian Army Nursing Assistant Mock Test Series 2025 General Science Chemistry Equilibrium
When we add aluminium foil to freshly prepared sodium hydroxide solution a gas is produced. Which of the following correctly states the property of this gas ?
1
Colourless and odourless gas which extinguishes a burning match stick.
2
Colourless and odourless gas which promotes burning of a candle
3
Brown coloured pungent smelling gas.
4
Colourless and odourless gas which produces a ‘pop’ sound when a burning match stick is brought near it.