alleryIgnition of hydrogen in air can occur at a volumetric ratio as low as:
A1% in air
B4% in air
C10% in air
D18% in air
Answer & Solution
Correct answer: B. 4% in air
Hydrogen is highly flammable and can ignite at volumetric concentrations as low as 4% in air.
Keep practising Study of the First Element: Hydrogen
Browse all Study of the First Element: Hydrogen questions for ICSE Class 9, or explore more Chemistry topics.
Related questions
Match each commercial application of hydrogen gas with its industry:Match each reducing action of hydrogen with the reduced product:Match each chemical reaction producing hydrogen gas with its reactants:Match each anomalous position factor of hydrogen with its dual behavior:Which rechargeable battery using pressurized H2 gas powers satellites?Hydrogen reactions with metal walls of pipelines and steel vessels cause:Hydrogenation converts unsaturated vegetable fats and oils into:In the Haber process, hydrogen gas is reacted with nitrogen to produce: