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Acids and Alkalis Quiz

Jeffrey Piggott 11 preguntas 2.107 visitas

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Preguntas del test (11)

  1. 1Acidic foods can be identified by what taste?
    1. Asalty
    2. Bsour
    3. Cbitter
    4. Dsweet
  2. 2A beaker full of acid is steadily added to a beaker full of base. The pH of the base will:
    1. Aincrease
    2. Bdecrease
    3. Cstay the same
    4. Dchange constantlly
  3. 3Which substance has the lowest pH?
    1. Amilk
    2. Bpure water
    3. Csoap solution
    4. Dlemon juice
  4. 4An unknown substance is added to a solution and the pH increases. The substance is:

    1. Aacidic
    2. Bneutral
    3. Calkaline
    4. Da solvent
  5. 5A piece of magnesium is dropped into a test-tube containing dilute hydrochloric acid.

    Why does the test-tube become warm?    Imagen de la pregunta 5
    1. AA. Hydrogen is produced.
    2. BB. The magnesium neutralises the acid.
    3. CC. The reaction is endothermic.
    4. DD. The reaction is exothermic.
  6. 6The diagram shows an experiment to compare the speed of reaction when limestone chips are added to acid.

    In which test-tube is the reaction most rapid?    Imagen de la pregunta 6
    1. AA.
    2. BB.
    3. CC.
    4. DD.
  7. 7Which element reacts with dilute sulphuric acid to produce hydrogen?
    1. AA. carbon
    2. BB. chlorine
    3. CC. copper
    4. DD. zinc
  8. 8For which pH change is there the largest increase in acidity?Imagen de la pregunta 8
    1. AA.
    2. BB.
    3. CC.
    4. DD.
  9. 9The diagram shows how hydrated copper(II) sulfate crystals can be made by reacting copper(II) oxide with dilute sulfuric acid.

    Why is the sulfuric acid heated in stage 1?
    Imagen de la pregunta 9
    1. AA. So it will react faster with the copper (III) sulfate crystals.
    2. BB. Because copper (III) sulfate crystals will not react with cold dilute sulfuric acid.
    3. CC. To make the copper (III) sulfate crystals dissolve faster.
    4. DD. So that more copper (III) sulfate can dissolve.
  10. 10The diagram shows how hydrated copper(II) sulfate crystals can be made by reacting copper(II) oxide with dilute sulfuric acid.

    Why do crystals form when the hot saturated solution is cooled in stage 5?    Imagen de la pregunta 10
    1. AA. Because the solubility of copper(iii) sulfate increases with temperature.
    2. BB. Because the solubility of copper(iii) sulfate decreases with temperature.
    3. CC. Because the solubility of copper(iii) sulfate decreases with temperature, and some copper (iii) sulfate will start to precipitate as the mixture cools.
    4. DD. Because the copper(II) sulfate and sulfuric acid molecules need to slow down before they can have successful collisions.

Información

Descripción
Quiz on Acids and Alkalis for Stage 9 of Cambridge Secondary 1
Idioma
English
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