Home › Courses › NDA › Science › Elements, Compounds and MixturesNDA Elements, Compounds and Mixtures — practice questions Explore 3 free Elements, Compounds and Mixtures questions in NDA Science. Open each question or exercise to read its content, reference answers and available explanation.
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Worked practice questions Match acid names to their formulas Read exercise and reference answers Matching pairs Left Hydrochloric acid Right HCl Left Sulphuric acid Right H₂SO₄ Left Nitric acid Right HNO₃ Instructions Tap the name of an acid, then tap the formula that goes with it. Open this exercise →
Sort the acidic salts from the basic Read exercise and reference answers Items Item NaHSO₄ Answer left Item KHCO₃ Answer left Item NaH₂PO₄ Answer left Item Mg(OH)Cl Answer right Item Pb(OH)NO₃ Answer right Item Cu(OH)₂·CuCO₃ Answer right Categories Left Acidic salt Right Basic salt Instructions Swipe each salt formula left for Acidic salt or right for Basic salt. Open this exercise →
Match indicators to their acid colour Read exercise and reference answers Matching pairs Left Litmus (in acid) Right Red Left Phenolphthalein (in acid) Right Colourless Left Methyl orange (in acid) Right Pink/Red Instructions Tap an indicator, then tap the colour it turns when it sits in an acid. Open this exercise →
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