Tag: TIFR Previous Year Question Papers Biology PYQ With Answer Key Download

11. A transition is spectroscopically allowed if it obeys: a. Wien’s displacement law b. The law of conservation of energy only c. The law of conservation of angular momentum only […]

10. A dye that is non-fluorescent in water becomes fluorescent with an emission maximum at 430 nm when bound to a globular protein. Its absorption maximum is 400 nm. Given […]

9. Proton NMR of ethyl acetate will show a. Three peaks, singlet-doublet-triplet in 3:2:3 intensity ratio b. Three peaks, singlet-quartet-triplet in 3:2:3 intensity ratio c. Three peaks, doublet-quartet-triplet in 2:2:3 […]

8. Which conformation of cyclohexane has a C3 axis of symmetry? a. Boat b. Twist boat c. Chair d. Envelope The chair conformation of cyclohexane possesses a C3 axis of […]

7. Nucleophilic attack will be most facile on a. CH2=CF2 b. CH2=CCl2 c. CF2=CF2 d. CH2=CH2 Nucleophilic Attack on Alkenes: CH2=CF2 Most Facile Nucleophilic attack occurs most readily on CH2=CF2 […]

6. The correct shape of the [TeF5]– ion on the basis of VSEPR theory is a. trigonal bipyramidal b. square pyramidal c. pentagonal planar d. see-saw The correct shape of […]

5. In an enzyme-catalysed reaction, if [S] = 10 KM the velocity of the reaction is about: a. 0.9 Vmax b. 0.7 Vmax c. 0.5 Vmax d. 0.1 Vmax Introduction […]

4. What type of impurity atoms are used to increase the number of conduction band electrons in intrinsic silicon? a. bivalent b. trivalent c. tetravalent d. pentavalent Pentavalent Impurity Atoms […]

3. The IR stretching frequency for C=O stretching in carboxylic acid chlorides, esters amides, and acid anhydrides generally ranks as: a. Acid chlorides> esters> acid anhydrides> amides b. Amides> esters> […]

2. When 1 litre of 1 M NaCl solution in water is mixed with 1 litre of 1M CaCl2 solution in water, what is the total concentration of chloride ions […]