Question

Heat the upper end of the test tube holder .
WRITE THIS IN PASSIVE VOICE

Answer 1

hey mate !!❤✌
here's ur answer ✍✍✍

$\mathrm{upper \: end \: of \: the \: test \: tube \: holder \: be \: heated}$

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Answer 2

$HEY MATE$

HERE IS YOUR ANSWER

The upper end of the test tube hold the heat.

$I HOPE IT'S HELP YOU$