Introduction to 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 one mole of water is equal to grams





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





7. . The chemical reaction between an acid and base results in the formation of a salt and





8. . Keeps their identity during a chemical reaction





9. . The chemical reaction in which one of the reactant must be water is called





10. . The atomic number is represented by





11. . The impure form of matter consisting of different kinds of elements or compounds is called





12. . ____________ is also called proton number





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





14. . A negative ion is called





15. . The symbol of gold is





16. . The word 'Chyma' means





17. . The quantity of a substance that describes its parameters and admitted internationally is called





18. . The unit of temperature in S.I system is





19. . The mass per unit volume of a substance is called





20. . The unit of density is called





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