Which one of the following is not a characteristic of a compound?

Asked in UPSC CDS 1 2018 · Topic: Inorganic Chemistry (Chemical Bonding and Molecular Structure)

1. Composition is variable.
2. All particles of compound are of only one type.
3. Particles of compound have two or more ele‐ ments.
4. Its constituents cannot be separated by simple physical methods.

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