*ASSIGNMENT*
*QUES.1-FILL IN THE BLANKS: -*
a)The boiling point of water is __________.
b)Water vapour can be changed into water by the process called_________.
c)Change of state from solid to liquid is called________.
d)_____ is a crystalline solid.
e)____ is the change from liquid to solid.
*QUES.2-ANSWER THE FOLLOWING QUESTIONS: -*
a) What is the melting point of ice?
b) Is the burning of a candle wax a chemical change? Why.
c) What are the different effects of heat?
d) Define the following terms: -
• melting
•boiling
•condensation
•sublimation
• freezing
•melting point
•boiling point
•diffusion
e) What is interconversion of state of matter?
f) What are physical properties? Name some physical properties.
g) Name any two solids that sublime at room temperature.
h) How can the following substances be distinguished from each other based on their physical properties:
*(Hint:- Solubility, conductivity, taste, shape, colour)*
1)common salt from sugar
2)silver from copper
3)plastic from iron
4)sand from common salt
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Answer:
a)100 degree Celsius
Sorry but these much i know no more very sorry .
Answer:
ques.no.1
a) 100°C
b) condensation
c) melting
d)
e) cooling
ques.no.2
a) 0°C
b) yes the burning of candle wax is a chemical change because when we burn a candle it reacts with the oxygen present in the air.