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Standard XII
Chemistry
Orthoboric Acid
49. Which of ...
Question
49. Which of the following form peroxide A)Bao2 B)Ko2 C)Mno2 D)No2 1)324 2)400 3)373 4)1024
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Q.
Find the number of peroxide molecule(s) in the following :
M
g
O
,
C
a
O
,
L
i
2
O
,
B
a
O
2
Q.
What mass of hydrogen peroxide will form when 16.9 g of barium peroxide is treated with 8.96 L of HCl gas at STP?
(Molar mass of Ba is 137 g/mol)
B
a
O
2
(
s
)
+
2
H
C
l
(
g
)
→
B
a
C
l
2
(
a
q
)
+
H
2
O
2
(
a
q
)
Q.
Assertion: Anhydrous
B
a
O
2
is used for preparing
H
2
O
2
Reason: Hydrated
B
a
O
2
is not available
Q.
15 g sample of
B
a
O
2
is heatedto
794
o
C
in a closed evacuated vessel of 5 litres capacity . How many g of peroxide are converted to
B
a
O
(
s
)
.
2
B
a
O
2
(
s
)
⇌
2
B
a
O
(
s
)
+
O
2
(
g
)
,
K
p
=
0.5
a
t
m
.
Q.
Among
K
O
2
,
A
I
O
−
2
,
B
a
O
2
and
N
O
+
2
unpaired electron is present in
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