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 ions is:





6. . The abbreviated name of an element is called:





7. . Which one is radical?





8. . The molecular mass of sulphuric acid is:





9. . The symbol of silver is:





10. . The matter can neither be created nor destroyed during a physical or chemical change. It is called:





11. . Different pure samples of the same compound contain elements in the same fixed ratio by weight. It is called:





12. . H₂O and H₂O₂ follow the law of:





13. . The compounds that do not obey the law of constant proportions are called:





14. . A substance that cannot be further divided into simpler substances is called:





15. . A substance containing two or more elements combined 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 is called:





19. . ................. is also called the proton number:





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





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