To remove air bubbles in a glass which of the following substance is added to the glass and heated slowly.

Aluminium powder

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Borax

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Silica

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Calcium hydroxide

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Solution

The correct options are
A Aluminium powder
B Borax
Borax or Aluminium powder is added to remove air bubbles. The air bubbles escape from the glass in this process. Aluminium powder/Borax settles at the bottom and it can be easily separated.

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To remove air bubbles in a glass which of the following substance is added to the glass and heated slowly.

The correct options are A Aluminium powder B BoraxBorax or Aluminium powder is added to remove air bubbles. The air bubbles escape from the glass in this process. Aluminium powder/Borax settles at the bottom and it can be easily separated.

The correct options are
A Aluminium powder
B Borax
Borax or Aluminium powder is added to remove air bubbles. The air bubbles escape from the glass in this process. Aluminium powder/Borax settles at the bottom and it can be easily separated.