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What is the SI unit of energy?

1. AKelvin
2. BNewton
3. CJoule
4. DWatt

Apart from mercury, which element is a liquid at room temperature?

1. ASodium
2. BBromine
3. CChlorine
4. DIodine

Sifat mana yang khas bagi logam?

1. APenghantar panas yang buruk
2. BPadatan rapuh yang mudah pecah
3. CSebagian besar berwujud gas pada suhu kamar
4. DMenghantarkan listrik dengan baik

Apa rumus aluminium oksida, yang tersusun dari ion Al³⁺ dan O²⁻?

1. AAl₂O₃
2. BAl₃O₂
3. CAlO₃
4. DAlO

Drops of water form on the outside of a glass of ice water. Where does this water come from?

1. AThe ice evaporates through the glass
2. BThe glass releases water when it gets cold
3. CWater vapour in the air condenses on the cold glass
4. DWater leaks through tiny holes in the glass

A gas mixture contains nitrogen at 600 mmHg, oxygen at 150 mmHg and other gases at 10 mmHg. What is the total pressure?

1. A760 mmHg
2. B600 mmHg
3. C750 mmHg
4. D253 mmHg

Which coefficients balance the equation for cellular respiration, __C₆H₁₂O₆ + __O₂ → __CO₂ + __H₂O?

1. A1, 6, 6, 6
2. B1, 6, 6, 12
3. C1, 3, 6, 6
4. D2, 6, 12, 6

Ethanol (CH₃CH₂OH) and dimethyl ether (CH₃OCH₃) have the same formula, C₂H₆O, but ethanol boils at a much higher temperature. Why?

1. ADimethyl ether is ionic and ethanol is covalent
2. BEthanol molecules are heavier than dimethyl ether molecules
3. CEthanol has an O–H group, so its molecules form hydrogen bonds with each other
4. DEthanol has more carbon atoms