Q. 25 Energy of the transition from 𝑛ℎ = 4 to 𝑛𝑙 = 2 for hydrogen atom is E × 103 cm–1.Given: Rydberg constant for hydrogen: 1.097 x 107 𝑚−1.Value […]
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GATE Life Science 2025 Previous Year Papers with Solutions
Edman’s Reagent, Threonine Chiral Centers, Cytosine in RNA DNA, Ion-Exchange Amino Acids
Q. 24 The CORRECT statement(s) regarding biomolecules is(are)(A) The N–terminal amino acid of a polypeptide can be identified by Edman’s reagent(phenyl isothiocyanate).(B) L–Threonine has only one chiral center.(C) Cytosine is […]
GATE Life Science 2025 Previous Year Papers with Solutions
CoCl2 HCl Dark Blue Complex Formation
Q. 23 Addition of a few drops of concentrated HCl to an aqueous solution of CoCl2forms a dark blue complex X.The CORRECT statement(s) for this reaction is(are)(Given: Atomic number of […]
GATE Life Science 2025 Previous Year Papers with Solutions
Grignard Reagent
Q. 22 The CORRECT statement(s) for the given reactions is(are)(A) P is formed as the major product in reaction I.(B) P is formed as the major product in reaction II.(C) […]
![Q.21 For product formation from only one type of reactant (e.g. A → product), the CORRECT match for the order of the reaction (given in Column I) with the half-life expression (given in Column II) is ([A]0 is the initial concentration and kr is the rate constant) Column I Order Column II Half-life expression i. Zero P. ln 2 / kr ii. First Q. [A]0 / 2kr iii. Second R. 1 / (kr[A]0) S. 2kr / [A]0 (A) i–R, ii–P, iii–S (B) i–Q, ii–P, iii–R (C) i–S, ii–R, iii–Q (D) i−Q, ii−P, iii−S](https://www.letstalkacademy.com/wp-content/uploads/2025/12/slide_21-4.png)
GATE Life Science 2025 Previous Year Papers with Solutions
Half‑life expressions for zero, first and second order reactions
Q.21 For product formation from only one type of reactant (e.g. A → product), the CORRECT match for the order of the reaction (given in Column I) with the half-life […]
GATE Life Science 2025 Previous Year Papers with Solutions
Hybridisation of Central Atom in I₃⁻, PCl₃, BF₃ and CO₂
Q. 20 A few species are given in Column I. Column II contains the hybrid orbitals used by the central atom of the species for bonding. The CORRECT match for […]
GATE Life Science 2025 Previous Year Papers with Solutions
Valine Isoelectric Point Calculation
Q.19 Consider the two 𝑝𝐾𝑎values of valine as 2.32 and 9.62. The isoelectric point (pI)of this amino acid is ______. (rounded off to two decimal places) The isoelectric point (pI) […]
![Q.18 The CORRECT statement(s) about [Ni(CN)4]2−, [Ni(CO)4] and [NiCl4]2− is(are) (Given: Atomic number of Ni: 28) (A) Both [Ni(CN)4]2− and [Ni(CO)4] are square planar complexes. (B) [Ni(CN)4]2− is diamagnetic and [NiCl4]2− is paramagnetic. (C) Both [Ni(CO)4] and [NiCl4]2− are paramagnetic. (D) [Ni(CN)4]2− is square planar and [NiCl4]2− is tetrahedral in shape.](https://www.letstalkacademy.com/wp-content/uploads/2025/12/slide_18-4.png)
GATE Life Science 2025 Previous Year Papers with Solutions
[Ni(CN)4]2− [Ni(CO)4] [NiCl4]2− Geometry Magnetism
Q.18 The CORRECT statement(s) about [Ni(CN)4]2−, [Ni(CO)4] and [NiCl4]2− is(are)(Given: Atomic number of Ni: 28)(A) Both [Ni(CN)4]2− and [Ni(CO)4] are square planar complexes.(B) [Ni(CN)4]2− is diamagnetic and [NiCl4]2− is paramagnetic.(C) […]
GATE Life Science 2025 Previous Year Papers with Solutions
Chirality of Cyclohexane and Tartaric Acid Isomers
Q. 17 The CORRECT statement(s) regarding the given molecules is(are)(A) Both I and II are achiral molecules.(B) Both II and III are chiral molecules.(C) IV is a chiral molecule.(D) Both […]
GATE Life Science 2025 Previous Year Papers with Solutions
Isothermal Expansion of Ideal Gas
Q. 16 The isothermal expansion of one mole of an ideal gas from 𝑉𝑖 to 𝑉𝑓 at temperature,T occurs in two ways.Path I: a reversible isothermal expansion;Path II: free expansion […]
