WorksheetsClassification Criteria and Color Overview
Total questions: 10
Worksheet time: 5mins
In the image of an industrial plant, hydrogen production is said to fall into two broad categories. Which pairing correctly names those categories?
High-carbon and low-carbon hydrogen
Green and blue hydrogen groups
Methane and water hydrogen types
Industrial and renewable hydrogen
Which factor is explicitly listed as part of hydrogen classification criteria in the plant image?
Export market destination
Carbon intensity of the process
End-use application sector
Storage medium and pressure
On the color spectrum slide, which set correctly lists named hydrogen colors shown?
Cyan, magenta, yellow, key
Amber, lime, indigo, black
Silver, teal, orange, white
Green, blue, grey, brown
If hydrogen is classified by production source, which two sources are directly mentioned on the plant slide?
Biomass and solar inputs
Coal and nuclear inputs
Petroleum and wind inputs
Methane and water inputs
Which energy source typically powers electrolysis to produce green hydrogen in the system shown?
Renewable electricity from wind or solar
Grid electricity from fossil fuels
Heat from steam methane reforming
Battery storage without generation
In blue hydrogen production illustrated, what happens to the CO2 generated during reforming?
Captured and stored via CCS
Converted to methane and reused
Neutralized using electrolyzers
Released directly into the atmosphere
Which process best describes how grey hydrogen is produced in industry?
Coal gasification under oxygen‑blown conditions
Electrolysis using renewable electricity sources
Biomass gasification with carbon capture equipment
Steam methane reforming without carbon capture
What is the primary environmental consequence of grey hydrogen production shown in the diagram?
CO2 emitted directly into the atmosphere
Methane fully converted into solid carbon
Zero greenhouse gases due to full CCUS
Air pollutants removed by catalytic filters
Compare brown (or black) hydrogen and grey hydrogen in terms of environmental impact. Which statement is most accurate?
Brown hydrogen releases only water vapor as a by‑product
Grey hydrogen with SMR is the most environmentally friendly option
Grey hydrogen uses CCUS to prevent atmospheric emissions
Brown hydrogen via coal gasification is generally more damaging
Which hydrogen category relies on electricity generated exclusively by solar power for water electrolysis?
Red hydrogen using nuclear thermal splitting
Yellow hydrogen using solar-generated electricity
Pink hydrogen using nuclear plant electricity
Turquoise hydrogen via methane pyrolysis
