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Byju's Answer
Standard XII
Mathematics
Fundamental Principle of Counting
Orange red co...
Question
Orange red coloured monoxide is:
A
N
a
2
O
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B
C
s
2
O
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C
L
i
2
O
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D
K
2
O
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Solution
The correct option is
B
C
s
2
O
Caesium monoxide,
C
s
2
O
is orange red coloured monoxide.
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Similar questions
Q.
Match the compounds (given in X) with their colours (given in Y) :
X
Y
A.
L
i
3
N
I
Pale yellow
B.
K
2
O
II
Orange
C.
C
s
2
O
,
K
O
2
III
Bright yellow
D.
R
b
2
O
IV
Ruby red
Q.
Which is not correctly matched?
(1) Basic strength of oxides.
C
s
2
O
<
R
b
2
O
<
K
2
O
<
N
a
2
O
<
L
i
2
O
(2) Stability of peroxides.
N
a
2
O
2
<
K
2
O
2
<
R
b
2
O
2
<
C
s
2
O
2
(3) Stability of bicarbonates.
L
i
H
C
O
3
<
N
a
H
C
O
3
<
K
H
C
O
3
<
R
b
H
C
O
3
<
C
s
H
C
O
3
(4) Melting point.
N
a
F
<
N
a
C
l
<
N
a
B
r
<
N
a
l
Q.
Which of the following is(are) not correctly matched?
(1) Basic strength of oxides:
C
s
2
O
<
R
b
2
O
<
K
2
O
<
N
a
2
O
<
L
i
2
O
(2) Stability of peroxides:
N
a
2
O
2
<
K
2
O
2
<
R
b
2
O
2
<
C
s
2
O
2
(3) Stability of bicarbonates:
L
i
H
C
O
3
<
N
a
H
C
O
3
<
K
H
C
O
3
<
R
b
H
C
O
3
<
C
s
H
C
O
3
(4) Melting point:
N
a
F
<
N
a
C
l
<
N
a
B
r
<
N
a
I
Q.
Increasing order of basic character of
M
g
O
,
S
r
O
,
K
2
O
,
N
i
O
and
C
s
2
O
Q.
When
N
a
and
L
i
are placed in dry air, we get:
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