Cevaplı Hemşirelik giriş sınavları için kimya çalışma kâğıdı

For a given substance, in which state do its particles move fastest?

1. ASolid
2. BLiquid
3. CGas
4. DThey move at the same speed in all states

AB → A + B tepkimesi hangi tür tepkimeyi gösterir?

1. ANötrleşme tepkimesi
2. BBirleşme (sentez) tepkimesi
3. CÇift yer değiştirme tepkimesi
4. DAyrışma tepkimesi

In a chemical reaction, what is the limiting reactant?

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

What is the molar mass of sulfuric acid, H₂SO₄ (H = 1, S = 32, O = 16 g/mol)?

1. A49 g/mol
2. B50 g/mol
3. C96 g/mol
4. D98 g/mol

Oksijen gazı (O₂) molekülünde ne tür bir bağ bulunur?

1. APolar kovalent tek bağ
2. BMetalik bağ
3. Cİyonik bağ
4. DApolar kovalent çift bağ

Why does keeping food in a refrigerator slow down spoilage?

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

A mixture contains sand, salt and water. Which sequence separates all three?

1. AFilter to remove the sand, then distil the filtrate to collect water and leave salt
2. BUse a magnet to remove the salt, then filter the sand
3. CEvaporate all the water first, then filter the salt away from the dry sand
4. DDistil first to remove the sand, then filter out the salt

Sulfuric acid reacts with sodium hydroxide: H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O. How many moles of NaOH neutralise 0,5 mol of H₂SO₄?

1. A2 mol
2. B1 mol
3. C0,5 mol
4. D0,25 mol