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a. According to Kanad, the smallest particle of matter that takes part in a reaction is atom.
b. The atomicity of hydrogen chloride molecule is 2.
c. A cation is formed when an atom donates one or more electrons.
d. The valency of metal M in the compound M2O5 is 5.
e. The chemical formula of potassium permanganate is KMnO4.
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