Skip to content
p.paperbanao.
Continue

Punjab (PTB) · Full book test (board pattern) · Free

2nd Year Chemistry Full Book Paper

85 marks · 3 hours · 55 questions. Covers: 17 chapters (CHAP 17: GROUP 2 ELEMENTS to CHAP 33: WATER).

Your school name

2nd Year Chemistry Full Book Paper

2nd Year · Chemistry · Punjab (PTB)

Name: ____________Roll No: ________Class/Section: ________Date: ________Total marks: 85Time: 3 hours

Q1. Multiple choice questions (Attempt all · 17 × 1 = 17)

  1. What by-product is released during the alkylation of methanamine with bromoethane?

    1. H2O

    2. HBr

    3. HCI

    4. NH3

  2. Which two gases primarily cause acid rain when released into the atmosphere?

    1. Carbon dioxide and Oxygen

    2. Sulphur oxides and Nitrogen oxides

    3. Hydrogen and Helium

    4. Ammonia and Methane

  3. Which level of water treatment is specifically responsible for the removal of physical debris?

    1. Primary treatment

    2. Secondary treatment

    3. Tertiary treatment

    4. Advanced treatment

  4. Chirality is also commonly referred to as:

    1. Handedness

    2. Polarity

    3. Isomerism

    4. Symmetry

  5. When the C-H bond breaks during the restoration of aromaticity, the cleavage is:

    1. Homolytic

    2. Heterolytic

    3. Photolytic

    4. Thermal

  6. Compared to Group 1 metals, Group 2 metals exhibit:

    1. Higher hardness and higher density

    2. Lower hardness and lower density

    3. Lower boiling points and higher solubility

    4. Softness allowing knife cutting and lower melting points

  7. Chromatography can be used to separate:

    1. Only coloured substances

    2. Only colourless substances

    3. Both coloured and colourless substances

    4. Neither coloured nor colourless substances

  8. Polymers designed for blood vessels must exhibit high ........, while those for bones must exhibit high .......:

    1. Transparency, elasticity

    2. Flexibility, strength

    3. Hardness, transparency

    4. Solubility, density

  9. The average atomic mass of Ne having isotopes , with natural abundance is:

    1. 20.50 amu

    2. 20.18 amu

    3. 30.70 amu

    4. 20.00 amu

  10. Deuterated solvents are used in to:

    1. Increase magnet strength

    2. Split the signals

    3. Provide a reference signal

    4. Avoid solvent signal interference

  11. Which one of the following does not represent an oxidation?

    1. Ethanal  ethanol

    2. Propan-1-ol propanal

    3. Propan-2-ol propanone

    4. Ethanol  ethanoic acid

  12. If a complex ion is represented as [Co(NH3)5Cl]n, where Cobalt is in the +3 oxidation state, what is the value of n?

    1. +3

    2. +2

    3. +1

    4. -2

  13. During Fehling's test, Cu2+ ions are reduced to which state?

    1. Metallic copper

    2. Cu1+ ions

    3. Cu3+ ions

    4. Complex copper salt

  14. Which of the following is explicitly mentioned as a factor affecting reactivity alongside bond energy?

    1. Boiling point

    2. Surface area

    3. Bond polarity

    4. Molecular geometry

  15. In drug development, designers employ XRD to realize how a drug molecule:

    1. Dissolves in liquids

    2. Attaches to its target

    3. Is packed into tablets

    4. Changes its chemical color

  16. What was unique about the structure of the molecule picked out by the computer model?

    1. It was exactly identical to penicillin

    2. It lacked any functional groups or heteroatoms.

    3. It possessed a molecular structure different from existing antibiotics.

    4. It was an inorganic metal complex.

  17. Penicillin kills bacterial strains by targeting the enzyme:

    1. Carbonic anhydrase

    2. Succinate dehydrogenase

    3. Trans-peptidase

    4. Amylase

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

  1. How is C-1 assigned in disubstituted benzene?

  2. 4-methylaniline reacts with HNO2(aq) at 4oC to form compound P. Compound P reacts with NaOH. The product of this reaction is compound Q. Draw the structure of compound P and Q.

  3. Draw the structure of the following: 3-methylpentanal

  4. Why do Group 2 metals conduct electricity better than Group 1 metals?

  5. Why is the E2 reaction called bimolecular?

  6. Why do transition elements form colored complexes/ions?

  7. Why is -COOH given higher priority than -OH?

  8. Define a tertiary (3o) alcohol

  9. What is thalidomide?

  10. Why does solubility of Group 2 hydroxides increase in terms of the relative changes in Hohyd and Holattice?

  11. Explain the mechanisms which the chloroalkane will adopt while giving nucleophilic substitution reactions.

  12. What is the role of a ligand in forming a complex ion, and what type of bond is formed?

Q3. Short questions (Attempt any 8 of 12 · 8 × 2 = 16)

  1. What is a "Target Molecule" (TM)?

  2. Describe a test (a different one in each case) that you could use to distinguish between the following pair of compounds: CH2=CH-CH2-OH and CH3CH2CHO

  3. Point out the main structural difference between the compounds in each of the following pairs. Glycolipids and lipoproteins

  4. Write the balanced equation for the reaction of aniline with bromine water.

  5. What tool is used to apply the sample spot onto the baseline of a TLC plate?

  6. For poly(chloroethene) (PVC): Name the monomer.

  7. What target organism was chosen to train the machine-learning algorithm to recognize antibacterial traits?

  8. What is the use of benzaldehyde and acetone?

  9. What is meant by the statement that the two polynucleotide chains of DNA are opposite to each other?

  10. Explain why glycine is the only standard amino acid that does not exhibit optical activity.

  11. What does the abbreviation "GC" stand for?

  12. What step must be performed on 4-aminophenol during paracetamol retrosynthesis before reaching phenol?

Q4. Short questions (Attempt any 6 of 9 · 6 × 2 = 12)

  1. What is surge current, what causes it, and why is it dangerous for a solar power system?

  2. What are the severe health risks posed to humans by exposure to heavy pesticide residues?

  3. Predict the  spectrum of butanoic acid.

  4. The molecular formulas of the following compounds are given below: but-1-ene: C4H8 buta-1,3-diene: C4H6: Find out the IHD of both of these compounds.

  5. What legal actions can be taken against an individual or industry under the Punjab Water Act, 2019?

  6. Why is the recycling of aluminium considered highly efficient compared to using raw ore?

  7. Define Therapeutic Index (TI) and write its mathematical expression.

  8. State two differences between and NMR spectroscopies.

  9. Explain how the two isomers shown in the diagram can be distinguished using the IR spectroscopy. image

Q5. Long questions (Attempt any 3 of 5 · 3 × 8 = 24)

  1. Describe the main steps involved in the extraction of metals from their ores.

  2. Define alcohols and clarify how they are categorized.

  3. Give a detailed account of importance of retrosynthesis in organic synthesis.

  4. How mass spectrometry is used to determine the isotopic mass and average atomic masses of elements? Explain giving an example.

  5. Describe in detail the double helix model of DNA as proposed by Watson and Crick in 1953.