Which of the following substances is not a homogenous mixture?
Filtered sea water
Soft drink
Flood water
Writing ink
Which of the following is found in cotton
Starch
Cellulose
Fat
Oil
The filter in a cigarette reduces the nicotine content by
Burning
Adsorption
Evaporation
Absorption
The nucleus of an atom contains
Protons only
Neutrons only
Protons and electrons
Protons and neutrons
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