Introduction to Chemistry MCQs – Chapter 1 DAE

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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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