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Q.29 Which one of the following amino-acids has highest fluorescence quantum yield (Φ) in aqueous solution? (A) Tyrosine (B) Tryptophan (C) Phenylalanine (D) Histidine Tryptophan exhibits the highest fluorescence quantum […]

Q.28 Which one of the following closely defines ‘Molten Globule’ state of a protein? (A) State with high degree of secondary structure and loss of tertiary structure (B) State with […]

Q.27 Which one of the following pairs of amino-acids in the protein has high propensity to take up the α-helix conformation? (A) Gly-Asp (B) Pro-His (C) Gly-Pro (D) Ala-Arg Ala-Arg […]

Q.26 Four proteins (P1, P2, P3 and P4) have 17, 10, 21 and 14 percent hydrophobic amino-acids respectively. The order of precipitation of these proteins using ammonium sulphate will be […]

Bromine water is decolourised upon reaction with (E)-3-hexene. Q.25 The structure of the product obtained is Key Concept: Reaction of Alkenes with Bromine Water Bromine water reacts with alkenes via […]

Bromine water is decolourised upon reaction with (E)-3-hexene. Q.24 It is due to (A) electrophilic addition of bromine to C=C (B) nucleophilic addition of bromine to C=C (C) electrophilic allylic […]

[FeCl4]2− (I), [CoCl4]2− (II) and [NiCl4]2− (III) are paramagnetic tetrahedral complexes. Q.23 The order of values of spin-only magnetic moment is (A) III > II > I (B) III > […]

[FeCl4]2− (I), [CoCl4]2− (II) and [NiCl4]2− (III) are paramagnetic tetrahedral complexes. Q.22 The order of values of crystal field stabilization energy is (A) I > III > II (B) III […]

Q.21 The value of standard half-cell potential of Cu2+/Cu couple (E0Cu2+,Cu) is 0.34 V. A wire of pure copper is immersed into a solution of copper nitrate. If the measured […]

Q.20 The value of Ka of acetic acid is 1.7 × 10−5 mol/dm3. The pH of a buffer solution prepared by mixing 100 ml of 0.1 M acetic acid with […]