WorksheetsCHAPTER 2 : THE STRUCTURE OF ATOM
Total questions: 23
Worksheet time: 9mins
Which substance is an element?
Air
Steam
Carbon
Naphthalene
Which pair is matched correctly?
Ammonia = Molecule
Neon = Molecule
Nitrogen dioxide = Ion
Hydrogen chloride = Ion
Which of the following shows the correct type of particle for each substance?
Water(atom) = Magnesium(molecule) = Sodium Chloride(ion)
Magnesium(atom) = Carbon dioxide(molecule) = Sodium Chlorida(ion)
Sodium Chlorida(atom) = Carbon dioxide(molecule) = Magnesium(ion)
Magnesium(atom) = Sodium Chlorida(molecule) = Carbon dioxide(ion)
Which substance consists of ions?
Carbon dioxide
Sulphur dioxide
Calcium Chloride
Hydrogen Chloride
Which of the following shows sublimation process?
Bromine vapour spreads throughout gas jar
Water changes into ice in the refrigerator
Naphthalene ball in cupboard becomes smaller
Volume of perfurm decreases in an opened bottle
Rate of diffusion depends on the mass of the gas particles. Which gas has the highest rate of diffusion?
[Molar mass: CH4 = 16 g/mol, NH3 = 17 g/mol, CO = 28 g/mol, SO2 = 64 g/mol]
CO
SO2
NH3
CH4
The following statements are about diffusion.
- The tiny particles are discrete
- The tiny particles move randomly by themselves
Which of the following situations are explained by the statements above?
I . Bromine gas mixing with air
II . Aqueous copper(II) sulphate moving through a gel
III . Melting of lead(II) bromide
IV . Combustion of magnesium in air
I and II
I and IV
II and III
III and IV
A sample of carbon dioxide gas is cooled. Which of the following is true about the velocity and the size of its particles?
Velocity of the particles = Increases ,
Size of the particles = Decreases
Velocity of the particles = Increases ,
Size of the particles = No change
Velocity of the particles = Decreases ,
Size of the particles = Decreases
Velocity of the particles = Decreases ,
Size of the particles = No change
The diagram shows an experiment to study the particle theory of matter.
Which of the following is the best explanation of the observation in the experiment?
Agar dissolves copper(II) sulphate
Copper(II) sulphate is an ionic compound
Particles in copper(II) sulphate are minute and discrete
The attraction force between agar and copper(II) sulphate
Which process occurs when iodine crystals are heated at room temperature and pressure?
Melting
Freezing
Evaporation
Sublimation
