Science Coordinate 0654: C11. Air and water Topical Past Paper Questions
Cambridge IGCSE Science Coordinate (0654) past-paper questions on C11. Air and water, free. This topic is frequently examined across 23 exam sessions. Sign in for the full topic-segregated question bank and AI worksheets.
Sample questions
A student determines the value of x in the formula of washing soda, $ \mathrm{Na}_{2}\mathrm{CO}_{3} \cdot x\mathrm{H}_{2}\mathrm{O} $. When washing soda crystals are heated, they release water from the crystals. The crystals form dry sodium carbonate powder as shown in the equat…
Hydrogen-oxygen fuel cells use hydrogen and oxygen to produce electricity. (a) The reactions at the electrodes in a hydrogen-oxygen fuel cell are shown. anode: $ H_{2} \rightarrow 2H^{+} + 2e^{-} $ cathode: $ 4H^{+} + O_{2} + 4e^{-} \rightarrow 2H_{2}O $ (i) State the name of the…
a) A sample of clean air contains nitrogen and other gases. State the percentage of nitrogen in the sample of clean air. (b) Argon is one of the other gases found in clean air. Fig. 5.1 shows the electronic structure of an atom of argon. Fig. 5.1 (i) Use Fig. 5.1 to explain why a…
Sign in required
Full C11. Air and water question set, mark schemes and AI worksheets
Log in for the full topic-segregated question set, mark schemes, and AI worksheets built from every Science Coordinate past paper. New accounts start with 25 free credits.
Explore all Science Coordinate topics
All Science Coordinate topics