ใบงาน เคมีสำหรับข้อสอบเข้าพยาบาล พร้อมเฉลย

In which state are most metals at room temperature?

1. APlasma
2. BGas
3. CSolid
4. DLiquid

Which group contains the alkaline earth metals, such as magnesium and calcium?

1. AGroup 18
2. BGroup 1
3. CGroup 2
4. DGroup 17

Which is a sign that a chemical reaction may have taken place?

1. AWater freezes into ice when put in a freezer
2. BSugar dissolves completely when stirred into water
3. CA block of wax melts when it is heated
4. DA gas is produced when two liquids are mixed

เจือจางสารละลาย 2 M ปริมาตร 100 mL จนมีปริมาตรรวม 400 mL ความเข้มข้นใหม่เป็นเท่าใด

1. A1 M
2. B0.5 M
3. C8 M
4. D2 M

What colour is phenolphthalein indicator in a basic solution?

1. ABlue
2. BYellow
3. CColourless
4. DPink

อะตอมแมกนีเซียมสูญเสียอิเล็กตรอนสองตัว ไอออนที่เกิดขึ้นคืออะไร

1. AMg²⁻
2. BMg⁺
3. CMg⁻
4. DMg²⁺

How much water must be added to 50 mL of a 10% solution to make a 2% solution?

1. A250 mL
2. B200 mL
3. C40 mL
4. D100 mL

A mixture contains sand, salt and water. Which sequence separates all three?

1. AEvaporate all the water first, then filter the salt away from the dry sand
2. BFilter to remove the sand, then distil the filtrate to collect water and leave salt
3. CDistil first to remove the sand, then filter out the salt
4. DUse a magnet to remove the salt, then filter the sand