Lembaran kerja Kimia untuk peperiksaan kemasukan kejururawatan dengan jawapan

About what percentage of dry air is oxygen?

1. A50%
2. B21%
3. C1%
4. D78%

What is the formula of methane, the main gas in natural gas?

1. ACH₂
2. BCO₂
3. CC₂H₆
4. DCH₄

What is the normal pH range of human arterial blood?

1. A7.35 to 7.45
2. B7.00 to 7.10
3. C7.85 to 7.95
4. D6.35 to 6.45

What is the oxidation number of an element in its uncombined (elemental) form, such as Fe or O₂?

1. AIt equals the group number
2. B−1
3. C0
4. D+1

Apakah jenis ikatan dalam molekul gas oksigen, O₂?

1. AIkatan ion
2. BIkatan tunggal kovalen berkutub
3. CIkatan logam
4. DIkatan ganda dua kovalen tak berkutub

An exothermic reaction is at equilibrium. What happens if the temperature is raised?

1. AThe equilibrium shifts toward the products, raising the yield
2. BThe equilibrium shifts toward the reactants
3. CThe equilibrium does not change
4. DThe reaction becomes endothermic

J.J. Thomson's cathode ray experiments led to which discovery?

1. AAtoms have a dense, positively charged nucleus
2. BThe nucleus contains uncharged neutrons
3. CElectrons occupy fixed energy levels
4. DAtoms contain small, negatively charged particles

Carbon-14 (atomic number 6) decays by emitting a beta particle. What does it become?

1. ABoron-14
2. BNitrogen-15
3. CNitrogen-14
4. DCarbon-13