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WorksheetsA-Level Chemistry Atoms Elements and Molecules_3&4
Total questions: 55
Worksheet time: 38mins
What is the correct symbol for oxygen?
a) O2
b) O3
c) O
d) OH
Question: Which of the following is the correct symbol for hydrogen?
a) H2
b) H3
c) H
d) HO
Which of the following is the correct symbol for nitrogen?
a) N2
b) N3
c) N
d) NH3
H2O
What is the formula for sodium hydroxide?
a) NaCl
b) NaOH2
c) Na2OH
d) NaOH
NHO3 represents
Sulphuric Acid
Hydrochloric Acid
Nitric acid
Sulphurus Acid
What is the formula for iron(II) sulfate?
a) Fe2SO4
b) FeSO4
c) FeSO3
d) Fe2(SO4)3
What is the formula for iron(III) oxide?
a) FeO
b) Fe2O
c) Fe3O
d) Fe2O3
What is the formula for magnesium sulphate and strontium sulfate?
a) SrSO3,
MgSO3
b) Sr(SO4)2, Mg(SO4)2
c) SrSO4,
MgSO₄
d) Sr2SO4, Mg2SO4
a reactant is a initial compound
True
False
A product is a new compound or molecule
True
False
A reactant is always on the right
False
True
A product is on the left and right
False
True
When carbon dioxide reacts with calcium hydroxide, which compound is formed?
a) Calcium oxide (CaO)
b) Calcium chloride (CaCl2)
c) Calcium carbonate (CaCO3)
d) Calcium sulfide (CaS)
What is the other product formed when carbon dioxide reacts with calcium hydroxide?
Ca(OH)2+CO2⟶CaCO3+H2O
a) Carbon monoxide (CO)
b) Oxygen gas (O2)
c) Water (H2O)
d) Hydrogen sulfide (H2S)
Calcium carbonate (CaCO3)
In this video, we'll look at how to write (a) equations for chemical reactions. An ionic equation is an equation that shows us which (b) s or (c) are being (d) and which are being (e) .
If (a) chloride reacts with Sodium; (b) displaces Lithium.
LiCl + Na → (c) . This produces (d) and lithium
The first step for writing an (a) is to write out the (b) for each atom or (c) involved in the (d)
Lithium (a) contains (b) ions (c) and Cl (d) . Pure sodium is simply Na it has no (e) . sodium chloride contains Na plus and Cl minus ions and pure Lithium is simply Li it has no charge
(a) contains Na+ and Cl- ions and pure (b) is simply Li it has no charge.
Now that we have the formulae of all of the (c) written out, the next step is to combine them into (d)
All the atoms and ions in the reactants are (a) and all the atoms and ions in the (b) are on the other.
If we combine these ions we will have Li + Cl- and na in the (c) which react to form (d) in the products
The last step is to (a) the formulae of any (b) ions or atoms.
The spectator ions are ions that (c) the reaction without really (d) themselves
They are ions that have not been either (a) during a reaction. because oxidation is the (b) and reduction is the (c) . That means they have not lost or gained any electrons so their (d)
So we look for any ions or atoms in our (a) that have not changed their (b) .
In our equation, the only (c) that does not change is the (d) ion Cl-. We have a Cl- on both sides
of the (e) and it doesn't change so it's a spectator ion
We can cross out the formula for (a) from both sides of the (b) . Finally, we can rewrite our equation without the (c) ions. For this
example that would be Li+ Na (d) Na+ and Li
The ion having positive charge on it, is known as ______________________ .
Electropositive ion
Electronegative ion
Anion
None of the above
Electropositive ion is also known as______________________ .
Ion
Electronegative ion
Anion
Cation
Symbol of Cuprous ion will be ______________.
Cu+2
Cu+1
Cu
Cu+3
Valency of Cuprous ion will be ________________.
4
2
1
0
Valency and symbol of silver ion will be ________ and _______ respectively.
1, Ag+
2, Ag+
1, Ag
1, Ag+3
Valency and symbol of Copper ( I ) ion will be ________ and _______ respectively.
1, Ag+
1, Cu+
1, Ag
1, Ag+3
Valency and symbol of Cu ( II ) ion will be ________ and _______ respectively.
1, Ag+
1, Cu+
2, Cu+2
1, Ag+3
Symbol of Mercuric ion will be ______________.
Hg+2
Hg+1
Hg+4
Hg+5
(a) is the gain of oxygen atoms.
(a) is the loss of oxygen atoms.
Is this an oxidation or reduction reaction?
carbon + oxygen → carbon dioxide
Oxidation
Reduction
Is this an oxidation or reduction reaction?
water → hydrogen + oxygen
Oxidation
Reduction
Which of these metals do not form an ore?
Copper
Gold
Iron
Magnesium
Which element has been oxidised?
iron oxide + lithium → iron + lithium oxide
iron
lithium
oxide
lithium oxide
Which element has been reduced?
iron oxide + lithium → iron + lithium oxide
iron
lithium
oxide
iron oxide
Define the following in terms of gain or loss of hydrogen with one example each :(i) oxidation. What is the first statement of the audio clip?
Oxidation is the gain of oxygen.
Oxidation is the loss of hydrogen.
Oxidation is loss of electrons
Remember the acronym OIL which means oxidation is loss.
Define the following in terms of gain or loss of hydrogen with one example each :(i) oxidation. What is the second statement of the audio clip?
Oxidation is the gain of oxygen.
Oxidation is the loss of hydrogen.
Oxidation is loss of electrons
Remember the acronym OIL which means oxidation is loss.
Define the following in terms of gain or loss of hydrogen with one example each :(i) oxidation. What is the third statement of the audio clip?
Oxidation is the gain of oxygen.
Oxidation is the loss of hydrogen.
Oxidation is loss of electrons
Remember the acronym OIL which means oxidation is loss.
Define the following in terms of gain or loss of hydrogen with one example each :(i) oxidation. What is the fourth statement of the audio clip?
Oxidation is the gain of oxygen.
Oxidation is the loss of hydrogen.
Oxidation is loss of electrons
Remember the acronym OIL which means oxidation is loss.
In the reaction of formation of magnesium oxide magnesium undergoes ________
a) reduction
b) oxidation
c) hydrogenation
d) decomposition
(a) Define the following in terms of gain or loss of hydrogen with one example each : (ii) reduction
What is the first statement of the audio clip?
Reduction reactions involve:
Addition of hydrogen:
Addition of electropositive element:
Removal of oxygen
Removal of electronegative element
Reducing agent is a substance which brings about reduction.
(a) Define the following in terms of gain or loss of hydrogen with one example each : (ii) reduction
What is the second statement of the audio clip?
A very clever mnemonic to remember this concept is RIG (Reduction is gain)
Addition of electropositive element:
Removal of oxygen
Removal of electronegative element
Reducing agent is a substance which brings about reduction.
(a) Define the following in terms of gain or loss of hydrogen with one example each : (ii) reduction
What is the third statement of the audio clip?
A very clever mnemonic to remember this concept is RIG (Reduction is gain)
Addition of electropositive element:
Removal of oxygen
Removal of electronegative element
Reducing agent is a substance which brings about reduction.
(a) Define the following in terms of gain or loss of hydrogen with one example each : (ii) reduction
What is the fourth statement of the audio clip?
A very clever mnemonic to remember this concept is RIG (Reduction is gain)
Addition of electropositive element:
Removal of oxygen
Removal of electronegative element
Reducing agent is a substance which brings about reduction.
(a) Define the following in terms of gain or loss of hydrogen with one example each : (ii) reduction
What is the fifth statement of the audio clip?
A very clever mnemonic to remember this concept is RIG (Reduction is gain)
Addition of electropositive element:
Removal of oxygen
Removal of electronegative element
Reducing agent is a substance which brings about reduction.
(a) Define the following in terms of gain or loss of hydrogen with one example each : (ii) reduction
What is the sixth statement of the audio clip?
A very clever mnemonic to remember this concept is RIG (Reduction is gain)
Addition of electropositive element:
Removal of oxygen
Removal of electronegative element
Reducing agent is a substance which brings about reduction.
Fe2O3 + 3CO → 2Fe + 3 CO2
Is what kind of reaction?
The iron oxide undergoes reduction (loses oxygen) to form iron. Therefore it is a reduction reaction
while the carbon monoxide is oxidized (gains oxygen) to form carbon dioxide. Therefore it is an oxidation reaction.
What is an ion?
a) A neutral atom
b) A charged atom or molecule
c) A type of compound
d) A subatomic particle
When an atom loses electrons, it becomes a __________.
a) Positively charged ion
b) Negatively charged ion
c) Neutrally charged ion
d) Unstable ion
When an atom gains electrons, it becomes a __________.
a) Positively charged ion
b) Negatively charged ion
c) Neutrally charged ion
d) Unstable ion
