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WorksheetsChemistry - Science Week 2020
Total questions: 10
Worksheet time: 5mins
Which of the following is a physical property of water?
Water is H2O.
Water reacts with iron to form rust
Water and sulfuric acid can react violently with each other.
Water is a clear, colourless liquid at 25 °C.
Which of the following is a chemical property of iron?
Iron is solid at 25 °C.
Iron reacts with water and air to form a new substance called rust.
Iron is dull grey-silver in colour.
Iron is hard.
The symbol for sodium is Na. This symbol is derived from:
Nadrium
Nacrium
Natrium
Sodium
What determines the position of an element in the periodic table?
Protons only
Neutrons only
Electrons only
Neutrons and electrons
An atom has an electron configuration ‘2, 8, 7’. What period and group of the periodic table is it?
Period 17, group 3
Period 3, group 17
Period 3, group 18
Period 7, group 17
pH measures the amount of which of the following particles in a solution?
H+ ions
Acid particles
OH– ions
Base particles
Another name for water H2O could be
Oxygen dihydrogen
Dihydrogen monoxide
Hydrogen 2 oxide
None of the above
Which one of the following pairs contains a strong acid and a weak acid?
HCℓ and NaOH
MgCO3 and CH3COOH
NH3 and KOH
HNO3 and H2CO3
If methyl ethanoate is boiled with an excess of aqueous sodium hydroxide and the resulting mixture is then distilled, the distillate contains mainly:
Methanol
Ethanoic acid (acetic acid)
Ethanol
Sodium ethanoate (sodium acetate)
Hydrogen gas can be used as a fuel, and the vapour produced can be condensed to give us good and clean water to drink.
True
False
