About Chemistry Quiz #845
Chemistry Quiz #845 was the quiz for Sunday, October 25, 2026: 10 questions: 3 easy, 4 medium and 3 hard. Everyone who played Chemistry Quiz that day got the same quiz, and it stays here to play for 60 days.
The questions of Chemistry Quiz #845
- Which light gas is used to fill party balloons so they float?
- What is the chemical formula for water?
- Which gas glows red-orange in classic glowing glass-tube signs?
- What is the pH of pure water?
- What is the scale that rates minerals from softest to hardest called?
- When sugar dissolves in water, what is the mixture called?
- What is the chemical name for table sugar?
- Which substance has the chemical formula NaOH?
- Which acid do ants use in their stings and bites?
- What is the chemical name for plaster of paris?
The answer options and the answers appear only when you play the quiz, one question at a time.
New to Chemistry Quiz? The rules, tips and common questions are on the Chemistry Quiz page, and Periodic Table Memory Tips for the Quiz goes into strategy.
Other days of Chemistry Quiz
- Chemistry Quiz #848, Oct 28
- Chemistry Quiz #847, Oct 27
- Chemistry Quiz #846, Oct 26
- Chemistry Quiz #844, Oct 24
- Chemistry Quiz #843, Oct 23
- Chemistry Quiz #842, Oct 22
- Today’s quiz, #851
Every day of the last 60 is in the puzzle archive.