Робочий аркуш «Хімія для вступних іспитів на медсестринство» з відповідями

Яка частинка в атомі має майже нульову масу порівняно з іншими?

1. AПротон
2. BНейтрон
3. CЯдро в цілому
4. DЕлектрон

What should a student always wear to protect the eyes when working with chemicals?

1. AReading glasses
2. BContact lenses
3. CSafety goggles
4. DSunglasses

What is activation energy?

1. AThe energy stored in the products
2. BThe minimum energy reacting particles need for a reaction to happen
3. CThe total energy released once the reaction has finished
4. DThe energy needed to melt a solid

Which nuclear process powers the Sun?

1. AFusion of hydrogen nuclei to form helium
2. BFission of uranium into smaller nuclei
3. CAlpha decay of helium
4. DCombustion of hydrogen gas with oxygen in its core

In a closed container, 10 g of substance A reacts completely with 5 g of substance B. What is the total mass of the products?

1. A15 g
2. B10 g
3. C50 g
4. D5 g

How many grams are in 2,5 kg?

1. A2500 g
2. B0,0025 g
3. C25 g
4. D250 g

Which phase change absorbs energy from the surroundings (is endothermic)?

1. ADeposition
2. BFreezing
3. CSublimation
4. DCondensation

Cotton soaked in ammonia (NH₃) and cotton soaked in hydrogen chloride (HCl) are placed at opposite ends of a glass tube. A white ring of ammonium chloride forms closer to the HCl end. What does this show?

1. AThe lighter NH₃ molecules diffuse faster than HCl molecules
2. BBoth gases diffuse at the same speed
3. CThe white ring forms where the gases are heaviest
4. DThe HCl molecules diffuse faster than NH₃ molecules