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Olympiad-Science
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Class 8
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Q)
Which one of the following is in crackers?
a
.
m
e
t
a
l
s
b
.
S
e
m
i
m
e
t
a
l
s
c
.
N
o
n
−
m
e
t
a
l
d
.
A
l
l
o
f
t
h
e
s
e
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