Acids, Bases and Salts Model Question Paper

9th Standard

    Reg.No. :
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Science

Time : 01:00:00 Hrs
Total Marks : 40
    5 x 1 = 5
  1. Hydrochloric Acid reacts with metal bicarbonates to give______

    (a)

    metal chloride

    (b)

    water

    (c)

    carbon di - oxide

    (d)

    all the above

  2. _____&_______metals do not react with HCI or HNO3

    (a)

    Gold & Magnesium

    (b)

    Silver & Magnesium

    (c)

    Gold & Silver

    (d)

    Zinc & Silver

  3. Which of the following are the is a weak bases?

    (a)

    NH4OH & NaOH

    (b)

    Ca(OH)2& KOH

    (c)

    NH4OH & Ca(OH)2

    (d)

    NaOH & KOH

  4. Which of the following solution is soapy to touch?

    (a)

    Acidic

    (b)

    Basic

    (c)

    Salt

    (d)

    Aquaregia

  5. Which of the following solutions do not conduct electricity?

    (a)

    alcohol

    (b)

    glucose

    (c)

    sulphuric acid

    (d)

    both a & b

  6. 5 x 2 = 10
  7. Complete the equation HCl+ H2⟶ H3O+ +Cl-

  8. Complete the equation H+ +H2⟶ ?

  9. Complete the equation HCl+? ⟶ NaCl+H2O

  10. Complete the equation Ca(OH)2+ ? ⟶ ?+H2O

  11. Interpret: NHSO4 is an acid salt

  12. 5 x 3 = 15
  13. What are organic acids? Given examples?

  14. What does acidity of base mean?

  15. What is Potash alum? Write its formula

  16. What is water of crystallisation?

  17. Why do blue colour copper sulphate becomes white on heating?

  18. 2 x 5 = 10
  19. Write notes on importance of pH in everyday life.

  20. List the properties of salts.

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