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Which functional group is found in all alcohols?

1. ACarboxyl group (–COOH)
2. BCarbonyl group (C=O) only
3. CAmino group (–NH₂)
4. DHydroxyl group (–OH)

Which element is a metalloid?

1. ASodium
2. BSilicon
3. CArgon
4. DSulfur

In a chemical reaction, what is the limiting reactant?

1. AThe reactant with the largest mass
2. BThe catalyst that controls the speed
3. CThe reactant that runs out first and stops the reaction
4. DThe reactant that is left over at the end

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

1. A253 mmHg
2. B760 mmHg
3. C600 mmHg
4. D750 mmHg

Why does ice float on liquid water?

1. AIce is less dense than liquid water
2. BIce is denser than liquid water
3. CIce contains trapped air from the freezer
4. DIce has a higher mass than the same volume of water

A piece of metal has a density of 8 g/cm³ and a volume of 5 cm³. What is its mass?

1. A13 g
2. B1,6 g
3. C0,625 g
4. D40 g

Hydrogen peroxide fizzes when poured on a cut because an enzyme in blood breaks it down. What gas is produced, and what type of reaction is it?

1. AChlorine, in a synthesis reaction
2. BCarbon dioxide, in a combustion reaction
3. CHydrogen, in a single replacement reaction
4. DOxygen, in a decomposition reaction

pH suatu larutan berubah dari 6 menjadi 4. Apa yang terjadi pada konsentrasi ion hidrogennya?

1. AMenjadi 100 kali lebih besar
2. BMenjadi 100 kali lebih kecil
3. CMenjadi 2 kali lebih kecil
4. DMenjadi 2 kali lebih besar