Group 2 STPM

Quiz
•
Chemistry
•
11th Grade
•
Hard

ker sin ong
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10 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
The carbonate of a Group 2 element (beryllium to barium) in the Periodic Table, MCO3, decomposes on heating. Which of the following explains why the thermal stability of MCO3 increases down Group 2? [2005, Q25]
The radius of M2+ ion increases
The lattice energy of MCO3 decreases
The charge density of M2+ ion decreases
The distance between M2+ and CO32- ions increases.
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Strontium is an element in Group 2 of the Periodic Table which is situated between calcium and barium. Which statement is true?
The strontium ion has a higher charge density than the calcium ion
Strontium sulphate is less soluble in water than calcium sulphate.
Strontium carbonate is more difficult to decompose than barium carbonate when heated
Strontium nitrate is more difficult to decompose than barium nitrate when heated
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
When aqueous solutions of barium nitrate and sodium sulphate are mixed, a white precipitate of barium sulphate is formed. Which statement explains why barium sulphate is precipitated from the reaction mixture? [2013 U2, Q10]
Its ions are large
It is an ionic compound with covalent character
Its enthalpy of hydration is lower than its lattice energy
It has a high solubility product
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Which element has a value of electronegativity closer to aluminium? [2013 U2, Q11]
Beryllium
Magnesium
Strontium
Barium
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Which reaction shows the strong heating of magnesium nitrate?
Mg(NO3)2 --> Mg(NO2)2 + O2
Mg(NO3)2 -->MgO2 + 2NO2
Mg(NO3)2 --> MgO + N2O + 2O2
2Mg(NO3)2 --> 2MgO + 4NO2 + O2
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Magnesium is a Group 2 element. When magnesium carbonate is heated, magnesium oxide is formed and carbon dioxide is liberated.
MgCO3 --> MgO + CO2
Which of the following is true when going down the group?
Lattice energy of carbonates decreases
Lattice energy of oxides decreases
Thermal stabilities of oxide decreases
Lattice energy of carbonates decreases
Lattice energy of oxides decreases
Thermal stabilities of oxide increases
Lattice energy of carbonates increases
Lattice energy of oxides increases
Thermal stabilities of oxide decreases
Lattice energy of carbonates decreases
Lattice energy of oxides increases
Thermal stabilities of oxide decreases
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
A solution of aluminium nitrate will turn blue litmus paper to red because
the Al3+ ion is hydrolysed
the Al3+ ion has a high charge
all aluminium compounds are acidic
aluminium nitrate is an ionic compound
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