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Fundamental concepts of Chemistry MCQs

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1. The purest form of matter is called





2. The smallest particle of an element that shows all its properties is called





3. The positive ion is called





4. The combining capacity of an element is called





5. The valency of sodium ion is





6. The abbreviated name of an element is called





7. Which one is a radical?





8. The molecular mass of sulphuric acid is





9. The symbol of silver is





10. The chemical reaction between an acid and base is called





11. The chemical reaction between an acid and base results in formation of a salt and ______





12. The chemical reaction in which one of the reactants must be water is called





13. The atomic number is represented by





14. A substance that cannot be further divided into simpler substances by physical or chemical means is called





15. A substance containing two or more elements combined together in a fixed ratio by mass is called





16. Such a change in which a new product is formed is called





17. An atom or group of atoms carrying a charge is called





18. The capacity of elements to lose or gain electrons to complete outermost shell is called ______





19. ______ is also called proton number





20. The number of atoms present in one molecule of an element is called





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