Chemistry for nursing entrance exams worksheet with answers

Which particle in an atom has a positive charge?

1. ANeutron
2. BPhoton
3. CProton
4. DElectron

What is the chemical symbol for sodium?

1. AS
2. BSo
3. CN
4. DNa

What are isotopes?

1. AIons that have gained electrons
2. BAtoms of the same element with different numbers of neutrons
3. CAtoms of different elements with the same number of neutrons
4. DAtoms of the same element with different numbers of protons

What is the formula of aluminium oxide, made of Al³⁺ and O²⁻ ions?

1. AAl₃O₂
2. BAl₂O₃
3. CAlO
4. DAlO₃

What are isomers?

1. ACompounds with the same molecular formula but different structures
2. BAtoms of the same element with different numbers of neutrons
3. CMolecules that contain the same number of bonds
4. DCompounds with the same structure but different molecular formulas

A patient's arterial blood pH is 7.25. How is this described?

1. ANeutral
2. BAlkalosis
3. CNormal
4. DAcidosis

Hyperbaric oxygen therapy places a patient in a chamber with oxygen at higher than normal pressure. Why does this raise the oxygen dissolved in blood plasma?

1. AHigher pressure turns the oxygen into a liquid
2. BGas solubility in a liquid increases with the partial pressure of the gas
3. CHigher pressure makes red blood cells divide faster
4. DHigher pressure lowers body temperature, so the blood can hold much more gas

The true volume in a flask is 10.0 mL. A student measures it three times and gets 8.1 mL, 8.1 mL and 8.2 mL. How are these results best described?

1. ABoth accurate and precise
2. BPrecise but not accurate
3. CNeither accurate nor precise
4. DAccurate but not precise