CSIR NET Chemical Sciences Answer Key December 2023 (Available)

CSIR NET Chemical Sciences Answer Key December 2023: NTA will release the CSIR NET Chemical Sciences official answer key for December 2023 examination shortly after the conclusion of the exam on the official website, along with the response sheet copies. Before that, candidates can check CSIR NET Chemical Sciences Answer Key December 2023, which will be available on this page today after the exam. The unofficial answer key will be released in PDF format for estimating the performance in the Chemical Sciences subject. Candidates should download the unofficial answer key for Chemical Sciences paper, check the answers thoroughly, and calculate the probable score. 

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CSIR NET Chemical Sciences Answer Key December 2023

Examinees can find the link to download the CSIR NET Chemical Sciences Answer Key Solutions (unofficial) for today’s exam here. Our experts prepare these answer keys and will help candidates evaluate their responses and calculate the probable test scores based on that.

1. The experimental magnetic moment (3.4 BM) of a hydrated salt of Eu3+ at 27°C is significantly different from the calculated value. The difference is due to (Given: atomic number of Eu is 63)
   1. population of electrons at higher / level(s) via thermal excitation.
   2. strong ligand field splitting of/-orbitals
   3. strong spin-orbit coupling
   4. pairing of electrons in t-orbitals
   Ans: 1. population of electrons at higher / level(s) via thermal excitation.
2. Which of the following plots [ k vs 1/T ] represent(s) the Arrhenious rate equation, k = Ae^A/T with A = 3x10⁷ s^-1 and E = 3x10⁴ J/mol.
   Ans: Graph I (curve) and II (y = mx + c format) 
3. Which band is called as a filled band?
   Ans: Valnece band
4. What is the value of the commutator at [ H, Px ]?
   Ans: ih (δV/δx)
5. How many tetrahedral and octahedral voids are there in FCC structure?
   Ans: Tetrahedral voids - 2 for each atom, octahedral voids - 1 for each atom

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1. What is the magnetic moment of Yb³⁺?
   Ans: 4.5 µB
2. Find the uncertainty in the kinetic energy of a particle if its mass has 2% uncertainty and velocity has 3% uncertainty.
   Ans: 11%
3. For a rectangular box, l_x = 2l_y and E = 10h²/8ml_y², then find m.
   Ans: m = 145
4. If y² = 4x and if there is 1% error in x, then find the percent error in y.
   Ans: Error in y = 5%
5. At what temperature does micelle formation take place?
   Ans: Above Kraft temperature.
6. How many nodes are there in 1,3 Butadiene Homo?
   Ans: one node and two electrons in the π2 molecular orbital
7. How many unpaired electrons are there in B₂?
   Ans: two unpaired electrons
8. Which among the following is the Slater determinant for He?
   Ans: [ 15 α (1)        15 β (1)
              15 α (2)        15 β (2) ]

Also Read | CSIR NET Question Paper and Answer Key December 2023 (All Shifts)

CSIR NET Chemical Sciences December 2023: Marking Scheme

Candidates while calculating their probable scores must check the marking scheme below for CSIR NET Chemical Sciences December 2023 examination.

CSIR NET December 2023 Important Links

Candidates can click on the link below to access all the important links related to CSIR NET December 2023 session:

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