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UNIT 5: Alkali and Alkaline Earth Metals
- Online Test
UNIT 5: Alkali and Alkaline Earth Metals
TEST : 3
# UNIT 5: Alkali and Alkaline Earth Metals
# TN 11th Chemistry
Prepare / Learn
Q1.
Which of the following statement is false ?
A.
Ca
2+
ions are not important in maintaining the regular beating of the heart
B.
Mg
2+
ions are important in the green parts of the plants
C.
Mg
2+
ions form a complex with ATP
D.
Ca
2+
ions are important in blood clotting
View Solution
Add Work Space
Answer :
Option A
Explaination / Solution:
Ca
2+
ion plays an important role in maintaining regular heart beat.
# UNIT 5: Alkali and Alkaline Earth Metals
# TN 11th Chemistry
Prepare / Learn
Q2.
The name 'Blue John' is given to which of the following compounds ?
A.
CaH
2
B.
CaF
2
C.
Ca
3
(PO
4
)
2
D.
CaO
View Solution
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Answer :
Option B
Explaination / Solution:
'Blue john' – CaF
2
(A variety of fluorite)
# UNIT 5: Alkali and Alkaline Earth Metals
# TN 11th Chemistry
Prepare / Learn
Q3.
Formula of Gypsum is
A.
CaSO
4
. 2H
2
O
B.
CaSO
4
.
½
H
2
O
C.
3CaSO
4
. H
2
O
D.
2CaSO
4
. 2H
2
O
View Solution
Add Work Space
Answer :
Option A
Explaination / Solution:
CaSO
4
. 2H
2
O
∴
Option (a)
# UNIT 5: Alkali and Alkaline Earth Metals
# TN 11th Chemistry
Prepare / Learn
Q4.
When CaC
2
is heated in atmospheric nitrogen in an electric furnace the compound formed is
A.
Ca(CN)
2
B.
CaNCN
C.
CaC
2
N
2
D.
CaNC
2
View Solution
Add Work Space
Answer :
Option B
Explaination / Solution:
# UNIT 5: Alkali and Alkaline Earth Metals
# TN 11th Chemistry
Prepare / Learn
Q5.
Among the following the least thermally stable is
A.
K
2
CO
3
B.
Na
2
CO
3
C.
BaCo
3
D.
Li
2
CO
3
View Solution
Add Work Space
Answer :
Option D
Explaination / Solution:
Li
2
CO
3
is least stable.
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