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

Which of the following is not a compound?

A)

Sulphur dioxide

B)

Chalk

C)

Lead

D)

Sulphuric acid

 

Grade:12th pass

2 Answers

Rituraj Tiwari
askIITians Faculty 1792 Points
10 months ago
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.
Vikas Amritiya
askIITians Faculty 158 Points
10 months ago

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.

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