정답이 있는 간호학 입학 시험 대비 화학 학습지

What does the prefix "milli-" mean?

1. AOne-thousandth (10⁻³)
2. BOne-millionth (10⁻⁶)
3. COne thousand (10³)
4. DOne-hundredth (10⁻²)

What does the double arrow (⇌) in a chemical equation show?

1. AThe reaction needs a catalyst
2. BThe reaction is reversible
3. CThe reaction releases heat
4. DThe reaction is very fast

Which element makes up the largest share of the human body by mass?

1. ACarbon
2. BOxygen
3. CNitrogen
4. DHydrogen

How many lone (non-bonding) pairs of electrons are on the oxygen atom in a water molecule?

1. A1
2. B4
3. C2
4. D0

Why does the vapour pressure of a liquid increase as it is heated?

1. AThe attractions between the molecules become stronger
2. BThe liquid's volume decreases and squeezes out vapour
3. CMore molecules have enough energy to escape into the gas phase
4. DThe molecules become heavier and press harder on the surface

To which family of organic compounds does ethanol, C₂H₅OH, belong?

1. ACarboxylic acids
2. BEsters
3. CAlkanes
4. DAlcohols

Haemoglobin binds oxygen reversibly: Hb + O₂ ⇌ HbO₂. How does this equilibrium help deliver oxygen to tissues?

1. ALow O₂ in tissues shifts it to the right, releasing oxygen
2. BHigh O₂ in tissues shifts it to the left, absorbing oxygen
3. CThe equilibrium does not change anywhere in the body
4. DLow O₂ in tissues shifts it to the left, releasing oxygen

얼음이 언 도로에 소금을 뿌리면 얼음이 녹는 데 도움이 되는 이유는 무엇인가요?

1. A소금이 얼음의 밀도를 높여 도로 속으로 가라앉게 하기 때문이다
2. B녹아 있는 소금이 물의 어는점을 낮추기 때문이다
3. C소금이 물의 어는점을 높이기 때문이다
4. D소금이 얼음과 반응하여 많은 열을 내놓기 때문이다