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WorksheetsReaction group 2
Total questions: 10
Worksheet time: 8mins
The metals of Group 2 react readily with oxygen to form compounds of general formula MO. When each of these oxides is added to water, which forms the most alkaline ?
MgO
CaO
SrO
BaO
Calcium oxide is added to water and the resulting mixture is filtered
This filtrate is X
When carbon dioxide is bubbled through filtrate X, a white precipitate is formed.
Which equation for this reaction of filtrate X with carbon dioxide is correct?
CaO + CO2 -> CaCO3
Ca(OH)2 + CO2 -> CaO + H2CO3
2CaO + H2O + CO2 -> CaCO3 + Ca(OH)2
Ca(OH)2 + CO2 -> CaCO3 + H20
River water in a chalky agricultural area may contain Ca2+, Mg2+ , CO2-3, HCO-3, Cl- , and NO-3 ions. In a waterworks, such water is treated by adding a calculated quantity of calcium hydroxide.
What will the precipitated following the addition of calcium hydroxide?
CaCl2
CaCO3
Ca(NO3)2
Mg(NO3)2
Steam is passed over heated magnesium to give compound X and hydrogen.
what is not the property of Compound X ?
It has a high melting point
It is a basic oxide
It is a white solid
It is very soluble in water
A metal, X, reacts with water to produce a colourless solution which gives a white precipitate when mixed with aqueous sulphuric acid.
what is metal X ?
Barium
Magnesium
Potassium
Sodium
Which statement about the oxides and hydroxides of the Group 2 elements Mg, Ca, Sr and Ba is correct ?
Each of the oxides reacts readily with water to form pH 12 or above
Magnesium oxide is used as a furnace lining because it has giant molecular structure and hence a high melting point
The hydroxides are produced directly by the thermal decomposition of the corresponding nitrates
The solubility of hydroxides increases from Mg to Ba
X is an s-block element. X form an insoluble carbonate with the formula XCO3. X forms a hydroxide that is more soluble than strontium hydroxide.
what could be the identity of X ?
Barium
Calcium
Cobalt
Rubidium
What can be seen when a piece of magnesium ribbon is placed in cold water?
A vigorous effervescence occurs
Bubbles of gas form slowly on the magnesium
The magnesium floats on the surface of the water and reacts quickly
The magnesium glows and a white solid is produced
When calcium is burnt in oxygen, what colour is the flame?
Green
Red
White
Yellow
What is the starting line of ‘lagu Amanah Rakyat’ ?
Mara perkasa menjunjung amanah rakyat
Hari ini hari mulanya hari esok berjaya
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