The oxide of element X neutralises acid, it means it is a basic oxide. So, X is a metal because the oxides of metals are basic in nature.
Question
An element X burns in air to form an oxide. This oxide neutralises dilute sulphuric acid to form a salt. Is X a metal or a non-metal?
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(i) ____________ is a metal. (ii) Metals are good ____________ of electricity.