Question

40) A small piece of iron was heated in a glass tube having a small amount of glass wool soaked in water. Upon heating a gas was evolved which is collected over water.The glass wool soaked in water helps in O a)producing steam O b) soaking the moisture O c) lubricating the piece of iron O d) oxidizing the piece of iron.​

Answer 1

Explanation:

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Answer 2

The correct answer is option a) producing steam.

• When iron is heated, its molecules loosen up. Therefore, it softens and can be given the required shape. However, it does not produce steam.
• For the collection of the gas, it is necessary to produce steam.
• When the heat comes in contact with moisture, it gives out steam. Hence, the glass wool soaked in water helps in the formation of vapor.