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Grade 10 · Chemistry

Grade 10 Chemistry diagnostic

14 questions on general chemistry, chemical reactions, acids, bases & ph, analytical chemistry, physical chemistry, organic chemistry and biochemistry. Answer what you can, then check your answers to see which topics are secure and what to practise next.

14 questions7 topicsAbout 15 minutesSet 1 of 5

Skip a question if you do not know the answer. It is better than guessing, because it shows what to practise.

1General chemistryA model sample has mass 8 g and stated molar mass 59 g/mol. Find its amount. Round to 3 decimal places if needed. Answer in mol.
mol
2General chemistryFor the abstract reaction A + 2B → C, 59 mol A and 57 mol B are available. Assume complete consumption of the limiting reactant. Find the maximum amount of C. Round to 3 decimal places if needed. Answer in mol.
mol
3Chemical reactionsBalance this equation using the smallest whole-number coefficients: __ P₄ + __ O₂ → __ P₄O₁₀. What is the coefficient of P₄?
4Chemical reactionsIn a sealed container, 4.3 g of A and 16.4 g of B react until B is used up. 0.9 g of A is left over, and the only product is C. What mass of C forms?
g
5Acids, bases & pHSolution X has pH 6 and solution Y has pH 8. Which is more acidic?
6Acids, bases & pHSolution X has pH 12 and solution Y has pH 8. Which is more acidic?
7Analytical chemistryA 32 mL aliquot at 0.9 mol/L is diluted to 224 mL total without reaction or loss. Find the final concentration. Round to 3 decimal places if needed. Answer in mol/L.
mol/L
8Analytical chemistryAn aqueous solution has concentration 0.5 mol/L. A model aliquot has volume 212 mL. Find the solute amount. Round to 3 decimal places if needed. Answer in mol.
mol
9Physical chemistryUse PV = nRT and R = 8.314 kPa·L/(mol·K). Find the ideal-gas volume for 2.1 mol at 389 K and 144 kPa. Round to 3 decimal places if needed. Answer in L.
L
10Physical chemistryAn ideal gas has initial pressure 134 kPa and volume 4.9 L. At fixed amount and temperature its volume becomes 1.5 L. Find the new pressure. Round to 3 decimal places if needed. Answer in kPa.
kPa
11Organic chemistryAn acyclic hydrocarbon has 10 carbon atoms, exactly one C=C bond and no other multiple bonds. How many hydrogen atoms are in its formula? Round to 3 decimal places if needed.
12Organic chemistryA hydrocarbon molecule contains 6 carbon atoms. In a complete-combustion model, all its carbon forms CO₂. How many moles of CO₂ come from 7 mol hydrocarbon? Round to 3 decimal places if needed. Answer in mol.
mol
13BiochemistryWhat often faces the aqueous environment in a phospholipid bilayer?
14BiochemistryWhich bond class describes a peptide linkage?