ใบงาน เคมีสำหรับข้อสอบเข้าพยาบาล พร้อมเฉลย

What is a beta particle?

1. AA wave of visible light
2. BA neutron that leaves the nucleus
3. CA high-energy electron released from a nucleus
4. DA helium nucleus with two protons and two neutrons

What is the term for anything that has mass and takes up space?

1. AHeat
2. BForce
3. CMatter
4. DEnergy

เลขอะตอมของธาตุบอกอะไร

1. Aจำนวนโปรตอนในแต่ละอะตอม
2. Bจำนวนนิวตรอนในแต่ละอะตอม
3. Cจำนวนรวมของโปรตอนและนิวตรอนในนิวเคลียส
4. Dจำนวนอะตอมในธาตุหนึ่งโมล

Which gas forms when hydrochloric acid reacts with calcium carbonate?

1. AOxygen
2. BCarbon dioxide
3. CHydrogen
4. DChlorine

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

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

Which halogen is the most reactive?

1. AFluorine
2. BIodine
3. CChlorine
4. DBromine

Frying an egg turns the clear egg white solid and white. What happens to the proteins?

1. AThey are hydrolysed, so the peptide bonds break into separate amino acids
2. BThey are converted into fats
3. CThey are denatured: their shape changes, but the peptide bonds stay intact
4. DThey are burned to carbon dioxide and water

What fraction of a radioactive isotope remains after three half-lives?

1. A1/6
2. B1/9
3. C1/8
4. D1/3