Four students were asked to observe the effect of heat on lead nitrate crystals. The teacher provided them with test tube holders, test tubes and solid lead nitrate, The students then started heating lead nitrate as shown below. The teacher stopped three of them for using the wrong procedure.
The correct way of heating is
a
I
b
II
c
III
d
IV
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Answer:
The correct way of heating is the second student
Reason-Test tube should be away from the face and heating should be gentle
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