ใบงาน เคมีสำหรับข้อสอบเข้าพยาบาล พร้อมเฉลย

What is radioactivity?

1. AThe glow produced by any hot object
2. BThe flow of electrons through a metal wire
3. CThe release of heat and light when fuels burn in air
4. DThe release of radiation by unstable atomic nuclei

Which state of matter has neither a fixed shape nor a fixed volume?

1. ASolid
2. BCrystal
3. CGas
4. DLiquid

What is a beta particle?

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

สารประกอบใดเกิดขึ้นระหว่างแคลเซียม (Ca²⁺) และคลอรีน (Cl⁻)

1. ACa₂Cl₃
2. BCa₂Cl
3. CCaCl
4. DCaCl₂

Which measurement has three significant figures?

1. A0.00560
2. B5.0006
3. C0.0056
4. D56

Rubbing alcohol evaporates faster than water at room temperature. What does this suggest?

1. AIt has a higher boiling point than water
2. BIts intermolecular forces are weaker than water's
3. CIts molecules are heavier than water molecules
4. DIts intermolecular forces are stronger than water's

What is the net ionic equation for the neutralisation of any strong acid by any strong base?

1. ANa⁺ + Cl⁻ → NaCl
2. BH₂ + O₂ → H₂O₂
3. CH⁺ + Cl⁻ → HCl
4. DH⁺ + OH⁻ → H₂O

A piece of copper is placed in zinc sulfate solution. Zinc is more reactive than copper. What happens?

1. AZinc metal coats the copper and the solution turns blue
2. BCopper replaces zinc, forming copper sulfate
3. CHydrogen gas is produced
4. DNo reaction occurs