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Punjab (PTB) · Quarter book test · Free

2nd Year Chemistry 1st Quarter Book Paper

40 marks · 1 hour · 28 questions. Covers: 5 chapters (CHAP 17: GROUP 2 ELEMENTS to CHAP 21: HALOGENOALKANES).

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2nd Year Chemistry 1st Quarter Book Paper

2nd Year · Chemistry · Punjab (PTB)

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

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

  1. 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

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

    1. Homolytic

    2. Heterolytic

    3. Photolytic

    4. Thermal

  3. Chirality is also commonly referred to as:

    1. Handedness

    2. Polarity

    3. Isomerism

    4. Symmetry

  4. 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

  5. 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

  6. Which of the following square planar complexes exhibits cis-trans isomerism?

    1. [Pt(NH3)4]2+

    2. [Pt(NH3)2Cl2]

    3. [PtCl4]2-

    4. [Ni(CO)4]

  7. What conditions are sufficient for the complete addition of halogens to benzene?

    1. Lewis acid catalyst

    2. Polar solvents only

    3. UV light and heat

    4. Room temperature in dark

  8. Which of the following compounds has no functional group?

    1. Methanol

    2. Carboxylic acid

    3. Cycloalkane

    4. Glucose

  9. What has primarily led to restrictions or banning of DDT in developed countries?

    1. High manufacturing cost

    2. Persistence in the environment

    3. Lack of effectiveness

    4. Bad odor

  10. The species formed when a Group 2 basic oxide (e.g., CaO) reacts with water:

    1. A salt and hydrogen

    2. A metal hydroxide

    3. A metal carbonate

    4. A salt and water

  11. Ethylenediaminetetraacetate ion (EDTA) is a:

    1. Bidentate ligand

    2. Tetradentate ligand

    3. Hexadentate ligand

    4. Monodentate ligand

  12. Nitration of benzene introduces which functional group onto the ring?

    1. Methyl group

    2. Hydroxyl group

    3. Nitro group

    4. Sulfonic acid group

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

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

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

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

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

  5. Why is the E2 reaction called bimolecular?

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

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

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

  9. What is thalidomide?

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

  11. What type of chemical process do Group 2 elements undergo during reactions?

  12. Give medicinal importance of cis platin.

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

  1. Classify hydrocarbons on the basis of their carbon skeleton.

  2. Explain the factors that determine the specific geometry (shape) of a transition metal complex.

  3. Describe the industrial preparation of quicklime from limestone. Explain the calcination process, reaction conditions, equilibrium control, and major industrial applications.

  4. Write the note on orientation in electrophilic substitution reactions of benzene.