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

What is a beta particle?

1. AA high-energy electron released from a nucleus
2. BA wave of visible light
3. CA neutron that leaves the nucleus
4. DA helium nucleus with two protons and two neutrons

What is osmosis?

1. AThe breaking of a solid into ions
2. BThe movement of water across a semipermeable membrane
3. CThe movement of solute particles against a gradient using energy
4. DThe dissolving of a gas in a liquid

What should a student always wear to protect the eyes when working with chemicals?

1. AContact lenses
2. BReading glasses
3. CSafety goggles
4. DSunglasses

Which element has the most metallic character?

1. AChlorine (Cl)
2. BSodium (Na)
3. CCaesium (Cs)
4. DAluminium (Al)

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

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

How should the volume of water in a graduated cylinder be read?

1. AFrom above the cylinder, at the top edge of the curved surface
2. BAt eye level, from the bottom of the curved surface (meniscus)
3. CFrom below, at the highest point the water touches the glass
4. DAt any angle, from the middle of the cylinder

A sealed rigid can holds gas at 2 atm and 27 °C. It is heated to 327 °C. What is the new pressure?

1. A24 atm
2. B2,4 atm
3. C4 atm
4. D1 atm

An element in period 3 forms an oxide with the formula X₂O₃. Which element is X?

1. AAluminium
2. BPhosphorus
3. CMagnesium
4. DSodium