What is the formula of barium oxide?
A) BaO
B) BaO2
C) Ba2O
D) Ba2O3
Correct Answer:
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Q25: Which is a binary compound?
A)H2
B)H2O
C)CaSO4
D)KClO
Q26: What is the formula of magnesium sulfate?
A)MgS
B)MgSO3
C)MgSO4
D)MgSO
Q27: Which is a binary compound?
A)O2
B)O3
C)NaClO3
D)NaCl
Q28: The metals in group 2A form ions
Q29: The elements in group 6A form ions
Q31: What is the formula of iron (III)oxide?
A)(FeO)
B)(Fe3O2
Q32: The elements in group 7A form ions
Q33: What is the formula of calcium nitrate?
A)Ca3N2
B)Ca(NO2)3
C)Ca(NO3)2
D)Ca(NO2)2
Q34: The metals in group 1A form ions
Q35: What is the formula of copper (II)oxide?
A)CuO
B)Cu2O
C)CuO2
D)CuO3
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