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Apa rumus kimia air?

1. AH₂O₂
2. BHO₂
3. CH₂O
4. DOH

Which method separates sand from water?

1. AChromatography
2. BEvaporation of the sand
3. CDistillation
4. DFiltration

Natrium dan kalium termasuk golongan apa?

1. AGas mulia (golongan 18)
2. BLogam alkali (golongan 1)
3. CLogam alkali tanah (golongan 2)
4. DHalogen (golongan 17)

Why does keeping food in a refrigerator slow down spoilage?

1. ACold temperatures add preservatives to the food
2. BLower temperatures slow down chemical and microbial reactions
3. CLower temperatures raise the activation energy of every reaction
4. DCold air contains no oxygen

Normal saline (0,9% NaCl) is used for IV fluids. How is it described compared with blood?

1. AHypertonic
2. BHypotonic
3. CIsotonic
4. DSaturated

Unsur mana yang paling elektronegatif?

1. ANatrium
2. BBesi
3. CFluorin
4. DHelium

2 mol H₂ dan 2 mol O₂ dicampur dan bereaksi sebagai 2H₂ + O₂ → 2H₂O. Pereaksi mana yang menjadi pereaksi pembatas?

1. AOksigen, karena oksigen lebih sedikit daripada hidrogen
2. BTidak ada, karena jumlahnya sama
3. CAir, karena merupakan produk
4. DHidrogen, karena 2 mol H₂ hanya memakai 1 mol O₂

Burning a match is strongly exothermic, so why does it not catch fire until it is struck?

1. AStriking makes the reaction endothermic
2. BStriking supplies the activation energy to start the reaction
3. CStriking pushes extra oxygen into the chemicals of the match head
4. DThe match must first absorb all its energy from the air