ใบงาน เคมีสำหรับข้อสอบเข้าพยาบาล พร้อมเฉลย

What are the building blocks (monomers) of proteins?

1. AFatty acids
2. BNucleotides
3. CSimple sugars
4. DAmino acids

What does the subscript 2 in H₂O tell you?

1. AWater has a charge of 2
2. BEach molecule contains two hydrogen atoms
3. CThere are two water molecules
4. DEach molecule contains two oxygen atoms

According to the kinetic molecular theory, how do gas particles move?

1. AConstantly, randomly and in straight lines between collisions
2. BAlways in a single direction, set by the pull of gravity
3. CSlowly in fixed positions
4. DOnly when heated, and then in neat lines between the walls

What is carbon-14 dating used for?

1. AEstimating the age of material that was once alive
2. BMeasuring body temperature
3. CFinding the exact age of rocks that are billions of years old
4. DDetecting carbon monoxide in a room

What feature makes a hydrocarbon an alkene?

1. AA ring of six carbon atoms with no hydrogen
2. BAt least one carbon–carbon double bond
3. CAn –OH group
4. DOnly carbon–carbon single bonds

How many moles of gas are in 44.8 L at STP (0 °C and 1 atm)?

1. A0.5 mol
2. B2 mol
3. C44.8 mol
4. D22.4 mol

รายการใดเรียงธาตุตามรัศมีอะตอมจากน้อยไปมาก

1. ANa, Mg, Al, Si
2. BO, F, N, C
3. CC, N, O, F
4. DF, O, N, C

How does soap help remove grease from skin?

1. AEach soap molecule has a polar end that attracts water and a nonpolar end that attracts grease
2. BSoap reacts with grease to form water and carbon dioxide
3. CSoap makes the grease more dense so it sinks
4. DSoap molecules are completely nonpolar, so they dissolve grease like a solvent