Most Important Questions of d-Block (Download PDF)!

By Renuka Miglani|Updated : August 21st, 2021

Hi Gradians,

It will not be a new thing for you if we say that Gradeup is considered as the synonym for success. For the past 5 years, At BYJU'S Exam Prep we have been promoting talented candidates of the CSIR-NET category to the path of success. BYJU'S Exam Prep has been an integral part of the preparation journey of many Aspirants.

As we all know, the CSIR-NET exam is very near and there is no time left for revision. At this point of time, you must be seeking some ready-made authentic short revision notes or some important questions to practice just before the exam. How will you react if you get all these study materials at one place? It will be beneficial for you at this time right! We at BYJU'S Exam Prep comes up with the Most Important Questions of d-Block for Chemical Sciences to help you score good marks which have been meticulously designed by our experienced subject-matter experts.

So what are you waiting for? Scroll down the article below and start study for the CSIR NET Exam, these questions will be fruitful during last-minute revision to fetch more marks in the exams. Students can also download it as a PDF file and save it for future purposes.

We have been providing short study notes for the Chemical Science subject which can be checked here. We have experienced immense love and support from all of you through these short notes in the CSIR-NET category, and we hope you all continue to support us in the same way!

 

Hi Gradians,

It will not be a new thing for you if we say that Gradeup is considered as the synonym for success. For the past 5 years, At BYJU'S Exam Prep we have been promoting talented candidates of the CSIR-NET category to the path of success. BYJU'S Exam Prep has been an integral part of the preparation journey of many Aspirants.

As we all know, the CSIR-NET exam is very near and there is no time left for revision. At this point of time, you must be seeking some ready-made authentic short revision notes or some important questions to practice just before the exam. How will you react if you get all these study materials at one place? It will be beneficial for you at this time right! We at BYJU'S Exam Prep comes up with the Most Important Questions of d-Block for Chemical Sciences to help you score good marks which have been meticulously designed by our experienced subject-matter experts.

So what are you waiting for? Scroll down the article below and start study for the CSIR NET Exam, these questions will be fruitful during last-minute revision to fetch more marks in the exams. Students can also download it as a PDF file and save it for future purposes.

We have been providing short study notes for the Chemical Science subject which can be checked here. We have experienced immense love and support from all of you through these short notes in the CSIR-NET category, and we hope you all continue to support us in the same way!

d-Block - Most Important Questions! (Download PDF)

 

1.  Which of the following is colourless?

  1. [Cu(NH3)4]SO4
  2. CuSO4.5H2O
  3. CuSO4
  4. CuCl2

2. AgCl on fusion with sodium carbonate gives:

  1. Ag2CO3
  2. Ag2O
  3. Ag
  4. None of the above

3. Which compound is formed when excess of KCN is added to an aqueous solution of copper sulphate?

  1. Cu(CN)2
  2. CuCN
  3. K2[Cu(CN)4]
  4. K3[Cu(CN)4]

4. Which of the following can be reduced by Zn?

  1. Na [Ag (CN)2]
  2. Na [Au (CN)2]
  3. (A) & (B) Both
  4. None of these

5. According to the Frost diagram, which element lies in the upper part?

  1. Sc
  2. Ti
  3. V
  4. Cr

6. The simple aqua ions Cu+ and Ag+ undergo which reaction in an aqueous solution?

  1. Oxidation
  2. Reduction
  3. Disproportionation
  4. None of the above

7. The conversion of an aqua ligand to an oxido ligand is favoured by:

  1. High pH
  2. Low pH
  3. Moderate pH
  4. Any pH

8. The Irving-Williams Series summarizes:

  1. Stability of complexes formed by M+ ions
  2. Stability of complexes formed by M2+ ions
  3. Stability of complexes formed by M3+ ions
  4. Stability of complexes formed by M5+ ions

9. Determine the term symbol of an atom having s1 configuration.

  1. 1S
  2. 2S
  3. Both can be possible
  4. None

10. What terms in a complex having Oh symmetry correlate with the 3P term of a free atom with d2 configuration?

  1. 3A1g
  2. 3T1g
  3. 3T2g
  4. 3A2g

Solutions

Solution 1: 

CuSO4 is colourless because it is anhydrous and does not have water of crystallisation. A and B are blue in colour while D is green in colour.

Solution 2: 

Solution 3: 

CuSO4+2KCN→Cu(CN)2+K2SO4
2Cu(CN)2→Cu2(CN)2+(CN)2
Cu2(CN)2+6 KCN→2K3[Cu(CN)4]
(Note: CN- is acting both as complexing and reducing agent)

Solution 4: 

Na[Ag(CN)2] +Zn→Ag+Na2[Zn(CN)4]

Na[Au(CN)2]+Zn→Au+Na2[Zn(CN)4]

Solution 5: 

According to the Frost diagram, species in the group oxidation state for Cr that is +6 lies in the upper part.

Solution 6: 

The simple aqua ions Cu+ and Ag+ undergo a disproportionation reaction in aqueous solution.

2Cu+(aq)Cu(s)+Cu2+(aq)

3Au+(aq)→2Au(s)+Au3+(aq)

Solution 7:

The formation of an oxido complex is favoured at high pH because the OH- ions which are formed in basic solution will remove protons from the aqua ligands. Aqua ligands act as a weak proton donor.

Solution 8:

The Irving-Williams Series generally summarizes the relative stabilities of complexes that are formed by bivalent ion that is M2+ and reflects a combination of LFSE with electrostatic effects.

Solution 9:

The singles electron has l=0 and s=1/2.

As there is only one electron, so,

L=0(an S term)

S=s=1/2

2S+1=2 (a doublet term)

Hence, the term symbol is 2S.

Solution 10:

For an octahedral complex, the three-p orbital will become triply degenerate, that is T1u. In the point group Oh, a P term of many electrons’ atoms becomes T1 term. As d orbitals have even parity, the overall term should be g. The multiplicity remains unchanged in the correlation, so, 3P term will become 3T1g.

 

Answer Key:

  1. C
  2. C
  3. D
  4. C
  5. D
  6. C
  7. A
  8. B
  9. B
  10. B

Download Important Questions on d-Block - Download PDF Here

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Posted by:

Renuka MiglaniRenuka MiglaniMember since Jan 2021
This article was curated by Renuka Miglani who is an Associate Manager at BYJU'S Exam Prep (CSIR-NET). A PostGrad with an educational background in Nutrition Science, she is an ardent reader & writer. Loves to impart knowledge to students. Being from a Nutrition Science background, she is well aware of the opportunities available and has hared the same in the above article. Stay tuned for more interesting articles from her which will be beneficial for your career.
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