Question 1
Which oxides are basic?
1 calcium oxide
2 sodium oxide
3 iron(II) oxide
A
1, 2 and 3
B
1 and 2 only
C
2 and 3 only
D
3 only
Question 2
[Maximum number: 1]
Which element forms an amphoteric oxide?
A
aluminium
B
carbon
C
magnesium
D
silicon
A
Question 3
[Maximum number: 1]
X and Y are oxides of two different elements.
- X reacts with water to produce aqueous solution Z .
- Z turns universal indicator paper blue.
- An aqueous solution of Y reacts with sodium carbonate to produce carbon dioxide gas.
Which statement is correct?
A
X and Y are both the oxides of metals.
B
X and Y are both the oxides of non-metals.
C
X is the oxide of a metal and Y is the oxide of a non-metal.
D
X is the oxide of a non-metal and Y is the oxide of a metal.
C
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