Page 1 - HOME ASSIGNMENT-3(PRACTICAL WS)

Name: AdmNo: Class/Sec: ( )
Dt:_________________
Melting Point and Boiling Point
Lab Work sheet
1.Why does the temperature remain unchanged until the entire ice changes into
liquid even if we are heating the beaker containing ice ?

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2. While doing the experiment, one of your friend added some common salt to
crushed ice, and also to the boiling water. Will be there any change in the melting
point of the ice-salt mixture? What will happen to the boiling point of the salt
solution?

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3. One of our student staying in Tibet sent his observation of boiling point of distilled
water as 70 C. State your remark on his observation.
0

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4. While doing the experiment of boiling point of water, at first the teacher forgot to
add some porcelain pieces to the flask. What observations did you notice

(a) Before adding porcelain pieces to the flask

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(b) After adding porcelain pieces to the flask

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