ใบงาน เคมีสำหรับข้อสอบเข้าพยาบาล พร้อมเฉลย

Which group contains the alkaline earth metals, such as magnesium and calcium?

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

An instant cold pack feels cold when the substance inside dissolves. How is this dissolving process classified?

1. AExothermic
2. BEndothermic
3. CA combustion reaction
4. DA neutralisation reaction

What is a molecule?

1. AA mixture of two different elements
2. BA single atom with a positive charge
3. CTwo or more atoms held together by covalent bonds
4. DThe nucleus of an atom

Which element has the most metallic character?

1. AChlorine (Cl)
2. BAluminium (Al)
3. CCaesium (Cs)
4. DSodium (Na)

What are London dispersion forces?

1. AForces that hold protons together in the nucleus
2. BStrong bonds formed by transferring electrons
3. CAttractions between a hydrogen atom and a metal ion
4. DWeak, temporary attractions caused by shifting electrons in molecules

Which property stays the same whether you have a small sample or a large sample of a pure substance?

1. AMass
2. BVolume
3. CDensity
4. DTotal heat content

A reaction at equilibrium has a very large equilibrium constant (K much greater than 1). What does this tell you?

1. AAt equilibrium, the mixture contains mostly products
2. BThe reaction is very fast
3. CThe reaction cannot reach equilibrium
4. DAt equilibrium, the mixture contains mostly reactants

J.J. Thomson's cathode ray experiments led to which discovery?

1. AThe nucleus contains uncharged neutrons
2. BAtoms contain small, negatively charged particles
3. CElectrons occupy fixed energy levels
4. DAtoms have a dense, positively charged nucleus