NEST Previous Year Questions
Q 1. A change in amino acids in a protein led to the formation of a salt bridge without affecting the protein's overall fold. Such a change will result in:
A. a decrease in enthalpy (H) of the protein.
B. a decrease in melting temperature ( Tm ) of the protein.
C. a decrease in stability of the protein.
D. an increase in free energy change (ΔG) of the protein.
Ans: (A) a decrease in enthalpy (H) of the protein
Q 2. When a human somatic cell undergoes mitotic division, the ploidy level in metaphase and telophase, respectively, would be:
A. 2n and 2n
B. n and n
C. 4n and 2n
D. n and 2n
Ans: (A) 2n and 2n
Q 3. According to the VSEPR theory, the shapes of PCl5,PCl4+, and PCl3, respectively, are
A. Trigonal bipyramidal, Tetrahedral, and Trigonal pyramidal
B. Trigonal bipyramidal, Square planar, and Trigonal planar
C. Square pyramid, Tetrahedral, and Trigonal pyramidal
D. Square pyramid, Tetrahedral, and Trigonal planar
Ans: (A) Trigonal bipyramidal, Tetrahedral, and Trigonal pyramidal
Q 4. The oxidation number and valence number of Ga in Ga2Cl4, having a metal-metal bond, respectively, are
A. 2 and 3
B. 3 and 3
C. 1 and 3
D. 3 and 2
Ans: (A) 2 and 3
Q 5. The metal ion that does not form a stable metal carbonyl complex is
A. Ti4+
B. V3+
C. Cr3+
D. Mn4+
Ans: Ti4+
NEST Exam Pattern 2026
NISER, Bhubaneshwar, announced the NEST exam pattern 2026 for the Computer-Based Test. According to the NEST exam pattern, there are four subjects in the examination, Physics, Chemistry, Biology and Mathematics, out of which the best of 3 sections are considered for the preparation of the merit list. Each subject accounts for 20 questions. The complete details about the NEST exam pattern 2026 are provided below:
NEST 2026 Test Pattern
NEST Exam Pattern 2026 |
Types of Questions | Multiple Choice Questions |
Subject Name | Physics Chemistry Biology Mathematics |
Total Questions | 20 questions per section |
Total sections | 4 |
Marks for each section | 60 |
NEST exam total marks | 240 |
NEST exam duration | 3 hours and 30 minutes |
NEST 2026 marking scheme | +3 for every correct answer -1 for every incorrect answer 0 for not attempting a question |