Who formulated ‘the atomic theory’ of a matter?
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When large quantities of ___ are consumed, it tends to slow metabolic processes and to depress the central nervous system.
Which of the following can undergo sublimation?
What is the percentage of methane in biogas?
_____ is produced from incomplete burning of fuels such as petrol and diesel.
What is the chemical name of chalk?
Sulphur and Chlorine can have what type of a bond?
______ bond holds the atoms together within a water molecule.
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