Chemistry for nursing entrance exams worksheet with answers

Which group contains the noble gases, such as helium and neon?

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

In which state of matter do particles have a fixed shape and a fixed volume?

1. ALiquid
2. BSolid
3. CGas
4. DPlasma

What does the rate of a reaction measure?

1. AHow much product forms in total by the end
2. BHow much energy the final products contain
3. CHow hot the reaction gets
4. DHow quickly reactants are used up or products are formed

Why do noble gases rarely react?

1. ATheir outer electron shells are already full
2. BThey are all radioactive
3. CTheir atoms are much larger than other atoms
4. DThey have no electrons at all

Which reacts more vigorously with water, potassium or sodium?

1. ASodium, because its outer electron is farther from the nucleus
2. BSodium, because it has fewer electron shells to shield its electron
3. CThey react equally, because both are in group 1
4. DPotassium, because its outer electron is farther from the nucleus

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

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

Ethanol (CH₃CH₂OH) and dimethyl ether (CH₃OCH₃) have the same formula, C₂H₆O, but ethanol boils at a much higher temperature. Why?

1. AEthanol has an O–H group, so its molecules form hydrogen bonds with each other
2. BDimethyl ether is ionic and ethanol is covalent
3. CEthanol has more carbon atoms
4. DEthanol molecules are heavier than dimethyl ether molecules

Methane burns as CH₄ + 2O₂ → CO₂ + 2H₂O. What mass of CO₂ (44 g/mol) forms from 16 g of CH₄ (16 g/mol)?

1. A16 g
2. B22 g
3. C88 g
4. D44 g