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Grade: 12th pass

                        

Which of the following is not a compound? A) Sulphur dioxide B) Chalk C) Lead D) Sulphuric acid

2 months ago

Answers : (2)

Rituraj Tiwari
askIITians Faculty
1789 Points
							Lead (Pb) is not a compound. It is an element present in its pure form so it a single homogeneous identity. Compounds have two or more elements present in the uniform composition in the compound state.
Sulphur dioxide (SO2) is formed by two elements namely, sulphur and oxygen.
Sulphuric acid (H2So4)is a compound formed by hydrogen, sulphur and oxygen.
The chemical formula for chalk is CaCO3 which is made up of carbon, calcium and oxygen.
Hence, option C is correct.
2 months ago
Vikas Amritiya
askIITians Faculty
158 Points
							

Lead (Pb) is not a compound. It is an element present in its pure form so it a single homogeneous identity. Compounds have two or more elements present in the uniform composition in the compound state.

 
Sulphur dioxide (SO2) is formed by two elements namely, sulphur and oxygen.
Sulphuric acid (H2SO4) is a compound formed by hydrogen, sulphur and oxygen.
The chemical formula for chalk is CaCO3 which is made up of carbon, calcium and oxygen.
 
Hence, option C  is correct.
2 months ago
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