Chemistry
Grade-8
Easy
Question
In the combined state, the carbon occurs as
- Coal
- lamp black
- Sugar
- Graphite
Hint:
Our food contains carbon in the combined form.
The correct answer is: Sugar
In the combined state, carbon is present as carbonate in many minerals, such as hydrocarbons in natural gas, petroleum etc. In air, carbon dioxide is present in small quantities, (0.03%). Our food also contains carbon in the combined form.
In sugar carbon is present in combined state.
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Read the following paragraph carefully. To a small quantity of (X), a few drops of HCl are added. Consequently, a colorless, odorless gas (Y) is formed. This gas(Y) on passing through lime water turns it milky due to the presence of (Z), and then the milkiness disappears due to the formation of (W)
Identify the compounds X, Y, Z, and W in the above change.
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1. Through the mouth of the conical flask, a thistle funnel is inserted.
2. Dilute hydrochloric acid is added dropwise through the thistle funnel so that the marble chips are completely immersed in the acid.
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