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Punjab (PTB) · Quarter book test · Free

9th Class Chemistry 3rd Quarter Book Paper

40 marks · 1 hour · 28 questions. Covers: 4 chapters (CHAP 9: Group Properties and Elements to CHAP 12: Empirical Data Collection and Analysis).

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9th Class Chemistry 3rd Quarter Book Paper

9th Class · Chemistry · Punjab (PTB)

Name: ____________Roll No: ________Class/Section: ________Date: ________Total marks: 40Time: 1 hour

Q1. Multiple choice questions (Attempt all · 12 × 1 = 12)

  1. Fossils fuel is responsible for our ...... problem:

    1. Pollution

    2. Particles

    3. Matter

    4. None of these

  2. Which element has high electronegativity value?

    1. Flourine

    2. Oxygen

    3. Chlorine

    4. Nitrogen

  3. Which of the following pair of quantities may be measured in the same unit?

    1. Heat and temperature

    2. Temperature and area

    3. Heat and work 

    4. Length and work

  4. The ability of carbon atoms to form chains is called:

    1. Isomerism

    2. Catenation

    3. Resonance

    4. Condensation

  5. A group of gases that maintains temperature of atmosphere is:

    1. Carbon dioxide and water vapours

    2. Nitrogen and carbon dioxide

    3. Oxygen and water vapours

    4. Nitrogen and oxygen

  6. Which statement is incorrect about non-metals?

    1. They are dull and cannot polish

    2. They are brittle

    3. They are poor conductors

    4. None of these

  7. The property of a measuring instrument to give the output very close to the actual value is termed as:

    1. Sensitivity

    2. Accuracy

    3. Precision

    4. Repeatability

  8. Simplest family of organic compounds is:

    1. Carbohydrates

    2. Proteins

    3. Oils

    4. Hydrocarbons

  9. Why is smog not felt in summer?

    1. Because fog is not present in summer

    2. Because due to heat of the Earth the smoke rises up

    3. Because in summer smoke and fog cannot mix with each other

    4. Because less fossil fuels are burnt in summer 

  10. What % of the elements in the periodic table are metals?

    1. 80%

    2. 65%

    3. 75%

    4. 90%

  11. In the measuring instrument, the degree of conformity and closeness to the true value is known as:

    1. Precision

    2. Accuracy

    3. Sensitivity

    4. Compatibility

  12. Which product will be formed when ethyl bromide (CH3 CH2 Br) is treated with Zn / HCI:

    1. CH4

    2. CH3 - CH3

    3. CH3 - CH2 - CH2 - CH3 

    4. CH3 - CH2 - CH3

Q2. Short questions (Attempt any 8 of 12 · 8 × 2 = 16)

  1. What are non-metals?

  2. What is meant by AQI?

  3. How will you avoid systematic and random errors? 

  4. Define structural formula with examples.

  5. Keeping in view the trends of reactivity in first group elements how would they react with oxygen?

  6. At which time of the day and night you expect humidity to be maximum?

  7. Define precision with an example.

  8. Why are organic compounds not generally soluble in water?

  9. What is relationship between water and alkali metals?

  10. Write the name of mojor air pollutants.

  11. Write two causes of errors.

  12. Why carbon forms stable and strong bond?

Q3. Long questions (Attempt any 3 of 4 · 3 × 4 = 12)

  1. Why does AQI not rise in Pakistan in hot days of summer?

  2. Explain IUPAC system of nomenclature for alkanes.

  3. Explain the role of sodium as heat transfer agent in the atomic nuclear power plant. Which property of sodium is utilized in this role.

  4. Elaborate the importance of using SI units in space exploration.