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Q.21 A mixture of four peptides, PKKRK, RGERV, RYRGV and LVVYP, is loaded ontoan ion–exchange column at pH = 7.2. If carboxymethyl (CM) cellulose is used asthe stationary phase of […]

Q.20 Consider two different paths in which the volume of an ideal gas doubles isothermally: Reversible expansion (work done = Wrev) Irreversible expansion, with the external pressure equal to the […]

Q.19 The dipole moment (μ) of BrF is 1.42 D and the bond length is 176 pm. The atomic charge distribution (q) in the molecule is _____ (rounded off to […]

Q.18 Considering cyclobutane to be planar, the number of planes of symmetry in thefollowing compound is _____________ (in integer). The given molecule (a planar 1,3‑dimethylcyclobutane with one Me as wedge […]

Q.17 The depression of freezing point of water (in K) for 0.1 molal solutions of NaCl andNa2SO4 are ∆𝑇1 and ∆𝑇2, respectively. Assuming the solutions to be ideal, theratio ∆𝑇1 […]

Q.16 Choose the CORRECT trend(s) of the first ionization energies among the following.(Given: Atomic numbers C: 6; N: 7; O: 8; F: 9; Si: 14; P: 15; S: 16; Cl: […]

Q.15 Suitable reagent(s) to bring about the conversion of P to Q in good yield is/are Introduction The conversion of benzene to cumene by Friedel–Crafts alkylation is a classic electrophilic […]

Q.14 Which of the following is/are CORRECT when two single complementary strandsof DNA come together to form a double helix at a given temperature?(∆𝑆 and ∆𝐻 are changes in entropy […]

Q.13 The CORRECT order of stability of the given metal oxides is(A) LiO2 > NaO2 > KO2 > RbO2(B) LiO2 < NaO2 < KO2 < RbO2(C) LiO2 < NaO2 > […]

Q.12 What is the major product formed in the given reaction? In carbohydrate chemistry, bromine water at mildly acidic pH is a classic reagent used to distinguish aldoses from ketoses […]