Lembaran kerja Kimia untuk peperiksaan kemasukan kejururawatan dengan jawapan

Which two substances must be present for iron to rust?

1. AHydrogen and oxygen gas only
2. BOxygen and water
3. CCarbon dioxide and salt
4. DNitrogen and water

Apakah isotop?

1. AIon yang telah memperoleh elektron
2. BAtom unsur yang sama dengan bilangan neutron yang berbeza
3. CAtom unsur yang sama dengan bilangan proton yang berbeza
4. DAtom unsur yang berbeza dengan bilangan neutron yang sama

What is the SI unit of temperature?

1. ADegree Celsius
2. BJoule
3. CDegree Fahrenheit
4. DKelvin

A solution has a pH of 2. What is its hydrogen ion concentration?

1. A1 × 10⁻¹² mol/L
2. B1 × 10⁻² mol/L
3. C1 × 10² mol/L
4. D2 mol/L

Nitric acid (HNO₃) reacts with potassium hydroxide (KOH). Which salt forms?

1. APotassium nitrite, KNO₂
2. BPotassium nitrate, KNO₃
3. CNitrogen hydroxide, NOH
4. DPotassium hydride, KH

Radioactive iodine (iodine-131) is used to treat some thyroid conditions. Why does it reach the thyroid?

1. ARadiation is always drawn toward the head
2. BIodine-131 is not radioactive inside the body
3. CIodine is strongly attracted to the metal ions stored in the neck
4. DThe thyroid gland takes up iodine to make its hormones

Hydrogen is usually placed at the top of group 1. Which statement about hydrogen is correct?

1. AIt has one valence electron like group 1 metals, but it is a nonmetal gas
2. BIt is an alkali metal that is solid at room temperature
3. CIt always forms H⁺ ions and never shares electrons
4. DIt has a full outer shell like the noble gases

Vitamin C is water-soluble and vitamin D is fat-soluble. What does this suggest about their molecules?

1. AVitamin C is polar, while vitamin D is mostly nonpolar
2. BVitamin C is nonpolar, while vitamin D is strongly polar
3. CBoth are ionic compounds
4. DBoth are equally polar