5. Choose from this list of substances and answer the following questions. A
Substance may be used once, more than once or not at all.
Oxygen, Sulphur, methane, sodium, carbon dioxide, salty water, iron, air
a). Name the elements.
b). Name the compounds
c). Name the non-metallic elements.
d). Name a substance which is an element made of molecule with
two atoms.
_________________________________________________
e). which substances are mixture.
_______________________________________________
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Answer:
a) Oxygen, Sulphur, Sodium, Iron
b)methane, Carbon dioxide,
c) Oxygen, Sulphur
d) Oxygen
e) Salt water, Air
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Answer:
1st ans. is sodium,iron
2nd is carbon dioxide,methane, air
3rd is oxygen , sulphur
4th is carbon dioxide
5th is salty water