B.Sc. I (Semester (Biotechnology) (CBCS Pattern) Examination, 2018
Fundamentals of Chemistry and Biophysics
Biophysics (Paper II)
Day and Date Monday, 12-11-2018 Max. Marks 70
Time 10.30 a.m. to 1.00 p.m.
1. Multiple Choice Questions. 14
The matter which remains in its deformed condition is called
Rubber Paper
Plastic material None of these
The cgs unit of stress is
dyne/cm2 cm2/dyne Δl/ΔL n/s
Hook's law is
Stress α strain Stress α 1/strain
Strain/Stress All of the above
The substance is highly soluble in a liquid then the surface tension of liquid
Increases Decreases
Does not change Either decrease or increase
The actual path taken by the particle of fluid is
Streamline Parallel
Randomly Interrupted
The tangential force opposing the relative motion between the adjacent layers is
Magnetic force Mechanical force
Viscous force Force of attraction
SI units of viscocity
Newton.second/m2 m/s
N/sec2
s/m
The force of attraction between molecules of different substances is
Attraction force Collision force
Electronic force Adhesive force
Molecular range of solids and liquids, it is the order of
10-2 10-9 10-7 10-6
10) For propagation of material medium is required.
Mechanical waves α-rays
Light waves X-rays
11) Surface tension of liquids with rise in temperature.
Increases may increases or decreases
Decreases Does not change
12) Electromagnetic waves are waves which can travel through the of outer space.
Vacuum Pressure
Vacuum and pressure All of the above
13) Ultrasonic wave is a sound wave transmitted at a frequency greater than
20 hz 20 khz 200 hz 2 hz
14) Reflection is the of a wavefront at an interface between two different media.
Equal in direction Same direction
Change in direction Parallel in direction
2. Answer the following (any four). 8
Define Young's modulus.
What do you mean by Hooks law
What is meant by Surface Tension and Surface Energy
State the principle of superposition of waves.
What is meant by ultrasonic and infrasonic waves
Write a note on (any two). 6
Elasticity
Nicol prism
Applications of laser.
3. Answer the following. 8
Explain the term stress strain curve
Give an explanation on Effect of temperature and pressure on viscosity of liquids.
Explain the terms
Streamline
Turbulent Flow.
Answer the following (any one). 6
With a neat diagram explain working of Veturimeter.
Define capillary action. What are the applications of capillary action
4. Answer the following (any two). 10
Discuss the factors affecting surface tension.
What are transverse and longitudinal waves State any three characteristics.
Define beat and explain any three applications of beat.
Answer the following (any one). 4
Explain any two applications of ultrasonic waves.
Explain the terms reflection and refraction.
5. Answer the following (any two). 14
Explain the working of Pitot's tube.
Describe Jaegers method for measurement of Surface tension.
With a neat diagram explain working of Helium-Neon Laser.