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Q 5 and 14 define alloys and it's examples

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Q6 a change of state directly from solid to gas without changing into liquid state ( or vice-versa ) is called sublimation
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Q7. The phenomenon of changing of a liquid into vapours at any temperature below its boiling point is called evaporation
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Q13.they show the properties of both metals and non metals
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Q4.compounds are made up of 2 or more atoms combined chemically in a fixed proportion
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Q9.the compounds which are formed by loosing or graining are called as ionic compounds ex.NaCl
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Q10.combining capacity of an element is called valency
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Q 11

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Q15.lemonade and soda water etc..
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Q18. metals :
1.they are lustourus
2.they are malleable
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Q19. Non metals
1.they are non lustourus
2.they are non nellable
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Q2 homogenous
AND
Q3 heterogenous

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Q1. Particles around us are know as matter
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Q8.


Atomic mass of Ca+(2 multiplied by atomic mass of Cl)
= 40+2 multiplied by 35.5
=40+71
=111u
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