Which zone of a flame does a goldsmith u...

Which zone of a flame does a goldsmith use for melting gold and silver and why?

Text Solution

Verified by Experts

A goldsmith uses the non-luminous zone (outermost zone) of candle flame to melt gold and silver because it is the hottest part of the candle flame and has most temperature.

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Knowledge Check

Which of the following acid is used by goldsmiths for cleaning gold and silver ornaments?

A

HCI

B

`H_2 SO_4`

C

`HNO_3`

D

`H_3 PO_4`

Which zone of a candle flame is the hottest ? ·

A

Dark innermost zone

B

Outermost zone

C

Middle luminous Zone

D

Central zone

In which zone of a flame fuel remains in vapour form?

A

blue

B

dark zone

C

luminous zone

D

non-luminous zone

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Which of the region of a flame is called luminous zone?

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