Hydrogen Grade 8 Chemistry

Hydrogen combines with other elements to form compounds such as

• acids

• carbohydrates

• proteins

• All of the above

Liquid hydrogen is used as a fuel in rockets and guided missiles because it has a high heat of _________________

For the laboratory preparation of hydorgen, __________ granules must completely be covered with an acid.

• magnesium

• calcium

• zinc

• silicon

Pure hydrogen burns with ____________ flame

• pale yellow

• bright blue

• pale blue

• bright yellow

Hydrogen and chlorine will combine ____________ in bright sunlight to form hydrogen chloride gas.

• explosively

• vigorously

• unevenly

• slowly

The reaction of hydrogen and oxygen is highly ________________.

Metals react with acid to liberate ____________ gas

_____________ proved that the gas he found was different from other gases.

• Henry Cavendis

• Humphry Davy

• Antoine Lavoisier

• Robert Boyle

The name for hydrogen comes from two Greek words meaning

• water forming

• gas forming

• water fearing

• fire forming

Hydrogen does not combine or react with _____________

• helium

• zinc

• nitrogen

• sodium