Elements that belong to the group 2 of the periodic table are generally called Alkaline earth metals.These are so called because their oxides and hydroxides are alkaline in nature and these oxides are found on the earth's crust.Let's try out some MCQ on them:
1) Who among the following introduced cement for the first time?
a) Joseph priestly
b) Josephine Cochrane
c) Joseph Swan
d) Joseph Aspidin
2) Which among the following oxides is highest in percentage composition in Portland cement?
a) Fe₂O₃
b) CaO
c) MgO
d) Al₂O₃
3) Which of the following Ca compounds form a suspension in water known by the name 'Milk of
Lime'?
a) Ca(OH)₂
b) Ca(HCO₃)₂
c) CaCO₃
d) CaSO₄
4) Which one of the alkaline earth metal shows anomalous behaviour?
a) Mg
b) Be
c) Ca
d) Ba
5) The ionic character of alkaline earth metal chlorides :
a) first increases and then decreases down the group
b) remains constant throughout the group
c) decreases down the group
d) increases down the group
6) Which one among the following has the highest solubility?
a) BaCO₃
b) BeCO₃
c) MgCO₃
d) SrCO₃
7) Which among the following alkaline earth metal fluoride has the lowest solubility?
a) BeF₂
b) MgF₂
c) CaF₂
d) BaF₂
8) Which among the following alkaline earth metal hydroxide has the highest solubility in water?
a) Ca(OH)₂
b) Mg(OH)₂
c) Ba(OH)₂
d) Be(OH)₂
9) Which among the following alkaline earth metal hydroxide shows the least basic character?
a) Mg(OH)₂
b) Be(OH)₂
c) Ba(OH)₂
d) Ca(OH)₂
10) Which among the following cation has the highest hydration enthalpy?
a) Mg²⁺
b) Ca²⁺
c) Ba²⁺
d) Be²⁺
11) Which among the following group Ⅱ metal is least reactive towards water?
a) Ba
b) Be
c) Ca
d) Mg
12) Which among the following alkaline earth metal sulphate has the highest solubility in water?
a) BeSO₄
b) BaSO₄
c) CaSO₄
d) MgSO₄
ANSWERS
1) d 2) b 3) a 4) b 5) d 6) b
7) a 8) c 9) b 10) d 11) b 12) a
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