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

1. A gas contains 50% helium and 50% methane by volume. What is the percentage by weight of methane in the mixture? a. 25% b. 40% c. 50% d. 80% […]

15. The elastic deflection of a weightless point-loaded cantilever is given by the equation: δ = Fx! 6EI (3L − x) Here, F is the point-loading force, L is the […]

14. A U-shaped tube with constant cross-section is separated into two halves by a semi-permeable membrane at its midpoint, which allows water to pass freely but not glucose. Initially there […]

13. In a closed and well-insulated room, the door of an ordinary running refrigerator is opened and left open for some time. From the time the door is opened, I […]

12. Which of the following operators commute? 𝐴 (𝑓 (𝑥) = [𝑓 (𝑥)]2   𝐵(𝑓 (𝑥)) = 𝑥𝑓(𝑥)    𝐶 (𝑓 (𝑥)) = 𝑑𝑓/𝑑𝑥 a. A commutes with B b. B […]

11. A 20 cm x 30 cm sheet of paper is illuminated by a candle 10 metres away. The total light power falling on it is X. The paper is […]

10. A spinning-top is spun anticlockwise (when seen from above). As the top slows down it starts precessing, i.e. its axis of rotation starts revolving around the vertical. What is […]

9. Four tubes of P32-labelled ATP with a half-life of 30 days are dispensed and stored at four different temperatures (25°C, 4°C, -20°C and -80°C). After 30 days, the residual […]

8. An angle has the following probability distribution: 𝑓 𝜃 = (1 + sin 3𝜃 )/2𝜋. What is the chance that the angle will lie between 0 and 120°? a. […]

7. Two carbon atoms have a non-covalent interaction whose potential energy varies with distance as 𝐸 𝑟 = 32000000/𝑟!” − 729/𝑟!, where r is measured in Angstroms. The equilibrium inter-atomic […]