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