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Tardigrade
Question
Chemistry
Phosphine is obtained by (1) Ca3P2+H2O xrightarrow (2) P4+NaOH xrightarrow (3) CHCl3+O2 xrightarrow (4) CCl4+O2 xrightarrow
Q. Phosphine is obtained by (1)
C
a
3
P
2
+
H
2
O
(2)
P
4
+
N
a
O
H
(3)
C
H
C
l
3
+
O
2
(4)
CC
l
4
+
O
2
1646
251
BHU
BHU 2008
Report Error
A
1, 2 and 3 are correct.
B
1 and 2 are correct.
C
2 and 4 are correct.
D
1 and 3 are correct.
Solution:
Phosphine is obtained either by treating calcium phosphite with water or by treating white phosphorus with alkali.
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m
p
h
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p
hi
t
e
C
a
3
P
2
+
6
H
2
O
p
h
os
p
hin
e
2
P
H
3
+
3
C
a
(
O
H
)
2
w
hi
t
e
p
h
os
p
h
or
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s
P
4
+
3
N
a
O
H
+
3
H
2
O
Wa
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hin
e
P
H
3
+
3
N
a
H
2
P
O
2