alleryStart learning →What does the name hydrogen mean based on its Greek origin?
- Water-former
- Acid-producer
- Gas-generator
- Light-bearer
Show answer and solution
Correct answer: A. Water-former
The name hydrogen originates from Greek words that translate to water-former.
ICSE Class 9 Study of the First Element: Hydrogen — practice questions
Explore 28 free Study of the First Element: Hydrogen questions in ICSE Class 9 Chemistry. Open each question or exercise to read its content, reference answers and available explanation.
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What does the name hydrogen mean based on its Greek origin?Read the answer and worked solution →Who first recognized hydrogen gas as a discrete chemical substance?Read the answer and worked solution →In 1671, Robert Boyle produced hydrogen gas by reacting dilute acids with:Read the answer and worked solution →What name did Henry Cavendish initially give to hydrogen gas?Read the answer and worked solution →Which subatomic particle is entirely absent from a protium nucleus?Read the answer and worked solution →What particles make up the nucleus of a deuterium (2H) atom?Read the answer and worked solution →Through which radioactive decay mode does tritium (3H) decay into helium-3?Read the answer and worked solution →What is the radioactive half-life of tritium (3H)?Read the answer and worked solution →What compound contains deuterium in place of ordinary hydrogen?Read the answer and worked solution →Which scientist discovered the hydrogen isotope deuterium in 1931?Read the answer and worked solution →Under standard ambient conditions, pure dihydrogen gas is:Read the answer and worked solution →Approximately what percentage of the density of air is hydrogen gas?Read the answer and worked solution →Who first liquefied hydrogen in 1898 using regenerative cooling?Read the answer and worked solution →What chemical substance is produced when hydrogen gas burns in oxygen?Read the answer and worked solution →Ignition of hydrogen in air can occur at a volumetric ratio as low as:Read the answer and worked solution →What general formula represents alkali metal hydrides formed with hydrogen?Read the answer and worked solution →In molten lithium hydride electrolysis, hydrogen gas is released at the:Read the answer and worked solution →What gases are formed by the reaction of steam with methane in SMR?Read the answer and worked solution →Which catalyst is required for the water-gas shift reaction to produce H2?Read the answer and worked solution →Commercial water electrolyzers commonly use catalysts based on which metal?Read the answer and worked solution →In the Haber process, hydrogen gas is reacted with nitrogen to produce:Read the answer and worked solution →Hydrogenation converts unsaturated vegetable fats and oils into:Read the answer and worked solution →Hydrogen reactions with metal walls of pipelines and steel vessels cause:Read the answer and worked solution →Which rechargeable battery using pressurized H2 gas powers satellites?Read the answer and worked solution →Match each anomalous position factor of hydrogen with its dual behavior:Read the answer and worked solution →Match each chemical reaction producing hydrogen gas with its reactants:Read the answer and worked solution →Match each reducing action of hydrogen with the reduced product:Read the answer and worked solution →Match each commercial application of hydrogen gas with its industry:Read the answer and worked solution →
Worked practice questions
Who first recognized hydrogen gas as a discrete chemical substance?
- Joseph Priestley
- Henry Cavendish
- Antoine Lavoisier
- Humphry Davy
Show answer and solution
Correct answer: B. Henry Cavendish
Henry Cavendish recognized hydrogen as a distinct substance in 1766.
In 1671, Robert Boyle produced hydrogen gas by reacting dilute acids with:
- Copper strips
- Silver powder
- Iron filings
- Gold ribbons
Show answer and solution
Correct answer: C. Iron filings
Robert Boyle produced hydrogen gas through the reaction of dilute acids with iron filings.
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