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 […]
![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)
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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 […]
GATE Life Science 2025 Previous Year Papers with Solutions
Arrhenius Equation Plot
Q. 15 The temperature dependence of reaction rates is generally given by the Arrheniusequation. A plot of ln 𝑘𝑟 against 1/𝑇 is a straight line from which the pre–exponential factor […]
GATE Life Science 2025 Previous Year Papers with Solutions
Standard Enthalpy of Formation H2O(g)
Q. 14 The standard enthalpy of the reaction,C (graphite) + H2O (g) → CO (g) + H2 (g) is found to be +131.3 kJ mol–1and the ∆𝑓𝐻0 value for CO […]
GATE Life Science 2025 Previous Year Papers with Solutions
Bond Order of N22−
Q. 13 The bond order in 𝑁22− species is(A) 2(B) 2.5(C) 3(D) 3.5 The bond order of N22− is 2, so the correct option is (A) 2. Introduction The bond […]
GATE Life Science 2025 Previous Year Papers with Solutions
Correct Order of Boiling Points for Hydrogen Halides
Q. 12 The CORRECT order of boiling points for the hydrogen halides is(A) HF > HI > HBr > HCl(B) HF > HCl > HBr > HI(C) HI > HBr […]
