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Federal (FBISE) · Quarter book test · Free

1st Year Chemistry 3rd Quarter Book Paper

40 marks · 1 hour · 28 questions. Covers: 6 chapters (13. Environmental Chemistry-Air to 18. Alcohol).

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1st Year Chemistry 3rd Quarter Book Paper

1st Year · Chemistry · Federal (FBISE)

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

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

  1. In conjugated alkenes, the carbon atoms are:
    1. sp hybridized
    2. Unhybridized
    3. sp³ hybridized
    4. sp² hybridized
  2. The compound 2-methyl-2-chloropropane (t-butyl chloride) is a:
    1. Primary alkyl halide
    2. Secondary alkyl halide
    3. Tertiary alkyl halide
    4. Quaternary halide
  3. Which of the following gases is not a greenhouse gas?
    1. Carbon dioxide (CO₂)
    2. Methane (CH₄)
    3. Nitrogen (N₂)
    4. Nitrous oxide (N₂O)
  4. Basic hydrolysis of an ester produces:
    1. Carboxylic acid and alcohol
    2. Acid and ketone
    3. Aldehyde and water
    4. Carboxylate salt and alcohol
  5. What is the main effect of crude oil leakage on the surface of water bodies?
    1. It increases light penetration
    2. It promotes aeration and plant growth
    3. It forms a black layer, blocking air and light from entering the water
    4. It adds essential nutrients for fish
  6. Hydrolysis involves the attack of:
    1. Water molecule
    2. Acid molecule
    3. Oxygen molecule
    4. Hydrogen molecule
  7. Alkanes are also called:
    1. Aromatics
    2. Acetylenes
    3. Olefins
    4. Paraffins
  8. In halogenoalkanes, a hydrogen atom of alkane is replaced by:
    1. Oxygen
    2. Nitrogen
    3. Halogen
    4. Sulphur
  9. The process by which greenhouse gases trap heat in Earth's atmosphere is called:
    1. Global cooling
    2. Greenhouse effect
    3. Ozone depletion
    4. Solar reflection
  10. Which reagent is used to convert alcohol into bromoalkane?
    1. KBr + H₂SO₄
    2. KMnO₄
    3. SOCl₂
    4. NaBr
  11. Water is called a universal solvent mainly because of its:
    1. Low density
    2. Polarity and hydrogen bonding
    3. High temperature
    4. Lack of solubility
  12. The IUPAC name of HCOOH is:
    1. Butanoic acid
    2. Ethanoic acid
    3. Propanoic acid
    4. Methanoic acid

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

  1. Define electrophile and nucleophile with two examples each.
  2. What are cis and trans isomers?
  3. What are Lucas reagent and its use?
  4. Write the general formula of alkyl halide.
  5. Define raw water and state its main use.
  6. Explain how air pollution affects labour productivity.
  7. Draw and name all the structural isomers of C₃H₆Bг₂.
  8. Why are double bonds in conjugated molecules called delocalized?
  9. What is esterification? Write a reaction for it.
  10. Write the equation for reaction of alkyl halide with KCN.
  11. Define point sources of water pollution and give two examples.
  12. Define air pollutants.

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

  1. Explain the mechanism of free radical substitution reaction of methane with chlorine with suitable equations.
  2. Explain oxidation and reduction reactions in organic compounds.
  3. Describe the impacts of human activities on the atmosphere
  4. Explain the classification of halogenoalkanes with suitable structural formulas and examples.