A change in which no new substances are formed is called _____________.
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Oxygen molecule is ______.
The most abundant element in the earth's atmosphere is
Terylene is a condensation polymer of ethylene glycol and which acid?
What is the reaction between an acid and a base called?
Carnotite is an ore/mineral of _____.
The elements known as primary nutrients for plants
Blotting paper absorbs ink due to
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