Химия для вступительных экзаменов на сестринские программы: лист заданий с ответами

Charles's law describes the relationship between which two properties of a gas, at constant pressure?

1. ADensity and mass
2. BVolume and temperature
3. CPressure and number of moles
4. DPressure and volume

What are enzymes?

1. AMinerals that build bone
2. BBiological catalysts, usually proteins
3. CFats that form most of the cell membrane
4. DSugars that store energy in the liver

Which method separates sand from water?

1. ADistillation
2. BFiltration
3. CEvaporation of the sand
4. DChromatography

Which statement describes a saturated fat?

1. AIt contains no carbon atoms
2. BIt is always liquid at room temperature
3. CIts fatty acid chains have many carbon–carbon double bonds
4. DIts fatty acid chains have no carbon–carbon double bonds

What is the name of the molecular compound CO?

1. ACarbon oxide
2. BCarbon dioxide
3. CCarbon monoxide
4. DMonocarbon oxide

At 20 °C, about 36 g of NaCl dissolves in 100 g of water. If 50 g of NaCl is stirred into 100 g of water at 20 °C, what happens?

1. ANone of the salt dissolves
2. BAll 50 g dissolves
3. CAbout 36 g dissolves and about 14 g stays undissolved
4. DAbout 14 g dissolves and about 36 g stays undissolved

An element has the electron arrangement 2, 8, 8, 2. Where is it on the periodic table?

1. AGroup 2, period 2
2. BGroup 8, period 2
3. CGroup 2, period 4
4. DGroup 4, period 2

Element A has 1 valence electron and element B has 7 valence electrons, both in period 3. Which statement best compares them?

1. ABoth are metalloids
2. BA is a reactive metal and B is a reactive nonmetal
3. CA is a nonmetal and B is a metal
4. DBoth are unreactive because they are in the same period