Skip to content
p.paperbanao.
Continue

Punjab (PTB) · Chapter test · Free

2nd Year Chemistry Chapter 2 TestTRANSITION METALS

30 marks · 40 minutes · 21 questions. Covers: CHAP 18: TRANSITION METALS.

Your school name

2nd Year Chemistry Chapter 2 Test

2nd Year · Chemistry · Punjab (PTB)

Name: ____________Roll No: ________Class/Section: ________Date: ________Total marks: 30Time: 40 minutes

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

  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. 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]

  3. Ethylenediaminetetraacetate ion (EDTA) is a:

    1. Bidentate ligand

    2. Tetradentate ligand

    3. Hexadentate ligand

    4. Monodentate ligand

  4. What is the log10 Kstab value for [Cu(EDTA)]2-?

    1. 5.6

    2. 13.1

    3. 18.8

    4. 2.4

  5. Adding excess ammonia to pink [Co(H2O)6]2+ gives a yellow solution. What other changes occur besides colour change?

    1. Coordination number changes from 6 to 4

    2. Oxidation state of Co changes from +2 to +3

    3. d orbital splitting magnitude (E) changes

    4. Complex becomes a precipitate

  6. What is the calculated overall Eocell potential for the reaction between acidified manganate(VII) ions and Fe2+?

    1. +0.75 V

    2. +1.52 V

    3. +2.29 V

    4. -0.75 V

  7. Losing only 4s electrons usually gives which oxidation state?

    1. +1

    2. +2

    3. +3

    4. +4

  8. Nickel salts are used as a catalyst in the preparation of acrylic acid from:

    1. Methane

    2. Ethene

    3. Acetylene

    4. Benzene

  9. What is the formula of the bidentate ligand 1,2-diaminoethane?

    1. NH2CH2NH2

    2. NH2CH2CH2NH2

    3. CH3CH2NH2

    4. NH3CH2CH2NH3

  10. Optical isomerism is commonly shown by which type of complexes with bidentate ligands?

    1. Square planar

    2. Linear

    3. Octahedral

    4. Tetrahedral

Q2. Short questions (Attempt any 6 of 8 · 6 × 2 = 12)

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

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

  3. Give medicinal importance of cis platin.

  4. What is the chelating effect?

  5. How coordination number 4 has two shapes i.e., tetrahedral and square planar? Explain it.

  6. If a complex containing the ligand Cl- absorbs light in the red/orange region of the spectrum, what general colour range would you expect the complex to appear?

  7. Discuss the two types of stereoisomerism found in transition metal complexes. Use the examples [Pt(NH3)2Cl2] (square planar) and [Ni(NH2CH2CH2NH2)3]2+ (octahedral) to illustrate the key structural differences that give rise to geometrical and optical isomerism, respectively.

  8. Write the equation for the reaction when [Cu(H2O)4(OH)2](s) is dissolved in excess ammonia.

Q3. Long questions (Attempt any 2 of 3 · 2 × 4 = 8)

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

  2. Explain in detail the ligand exchange reactions of Copper(II) complexes.

  3. Explain the stereoisomerism with its types in transition metal complexes.