Dalton’s atomic theory states that atoms of different elements combine together in simple whole number ratio. In the formula of C12H22O11, the carbon, hydrogen and oxygen combine in whole number ratio but the ratio is not simple.
Question
Dalton’s atomic theory is contradicted by the formula of sucrose (C12H22O11). Justify the statement.
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A health food store has a large display of bracelets made of copper metal. The storekeeper claims that the copper atoms from the bracelet diffuse into the body and the wearer is protected against rheumatoid diseases. Kuber wants to buy a bracelet for his grandmother who is suffering from arthritis. But his friend Ramesh suggests him against it. He says that it is a superstitious belief and wearing any metal on the body does not cure someone of the disease. Answer the following questions based on the above information: (𝒊) Do you think that Kuber should agree to Ramesh’s advice and not buy the bracelet? Give one reason. (𝒊𝒊) What values are displayed by Ramesh through his suggestion? (𝒊𝒊𝒊) Suggest one activity to promote these values.
Open Answer »A colorless liquid is thought to be a pure compound. Analysis of three samples of the material yield the following results.
| Mass of Sample | Mass of carbon | Mass of Hydrogen | |
| Sample 1 | 1.0 g | 0.862 g | 0.138 g |
| Sample 2 | 1.549 g | 1.335 g | 0.214 g |
| Sample 3 | 0.988 g | 0.852 g | 0.136 g |