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SS3: CHEMISTRY - 1ST TERM

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  1. Volumetric Analysis (Titration) | Week 1
    3 Topics
    |
    1 Quiz
  2. Heat of Neutralization & Redox Titrations | Week 2
    2 Topics
    |
    1 Quiz
  3. Test for Common Gases | Week 3
    2 Topics
    |
    1 Quiz
  4. Qualitative Analysis I | Week 4
    3 Topics
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    1 Quiz
  5. Qualitative Analysis II | Week 5
    2 Topics
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    1 Quiz
  6. Qualitative Analysis III | Week 6
    3 Topics
    |
    1 Quiz
  7. Qualitative Analysis IV - Anions | Week 7
    1 Topic
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    1 Quiz
  8. Test for Fat and Oil; Protein; Starch | Week 8
    3 Topics
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    1 Quiz
  9. Petroleum I | Week 9
    4 Topics
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    1 Quiz
  10. Petroleum II | Week 10
    5 Topics
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    1 Quiz

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SS3: CHEMISTRY – 1ST TERM Test for Common Gases | Week 3 Theory Questions – Test/Identification of Gases
Lesson 3, Topic 2
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Theory Questions – Test/Identification of Gases

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Topic Content:

  • Theory Questions & Answers – Test/Identification of Gases

Theory Questions – Test/Identification of Gases:

1. Name one gas each which is:

(i) acidic to litmus

(ii) alkaline to litmus

(iii) neutral to litmus

2. Name two gases which are: (i). Less dense than air (ii). Denser than air.

3. Mention any gas that can change the colour of potassium dichromate(VI) paper to green.

4. A gas with a rotten egg smell is likely _______________.

 

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Theory Questions & Answers – Test/Identification of Gases

1. Name one gas each which is:

(i) acidic to litmus

Answer: Chlorine gas

(ii) alkaline to litmus

Answer: Ammonia gas

(iii) neutral to litmus

 Answer: Hydrogen gas

 

2. Name two gases which are:

(i). Less dense than air

Answer: Hydrogen gas and Ammonia gas

(ii). Denser than air.

Answer: Chlorine gas and Hydrogen Sulphide gas

 

3. Mention any gas that can change the colour of potassium dichromate(VI) paper to green.

Answer: Sulphur(IV) oxide, SO2(g)

 

4. A gas with a rotten egg smell is likely:

Answer: Hydrogen sulphide (H2S)

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