Chemistry A-Level
Identical conditions required for valid comparison
What Identical conditions required for valid comparison means in Chemistry A-Level, as defined for OCR.
Definition of Identical conditions required for valid comparison
Check what you remember
Read the wording for your board, then hide it and explain Identical conditions required for valid comparison in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
Retention time depends on conditions, so comparisons are only valid when conditions are kept the same, such as the same column, carrier gas flow and temperature.
Topics that use Identical conditions required for valid comparison
- Chromatography and qualitative analysis (OCR A-Level)
Related terms
- 2,4-dinitrophenylhydrazone derivative
- Acidified dichromate(VI) and alcohols
- Adsorption and differential movement
- Adsorption and spot position
- Bromine water and alkenes
- Bromine water test for alkenes
- Carbon–halogen bond strength and reactivity
- Carbonyl compounds: aldehydes and ketones
Using Identical conditions required for valid comparison in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
Practise Chemistry questions
Create a free account to answer exam-style questions on this topic and get feedback on your answers.
Start free
All Chemistry A-Level termsA week of Premium from your first lesson · Then the free plan continues · No card, no charge