321. What is the one of the other name of Vitamin “A”?
A. Riboflavin
B. Ascorbic Acid
C. Retinol
D. Thiamin

322. What is the name of the gas used in an air conditioner?
A. Ammonia
B. Nitrous oxide
C. Freon
D. CO2

323. Internal friction of fluid is called_________?
A. Viscosity
B. Surface tension
C. Resistance
D. Cohesive force

324. The process whereby energy is dissipated from the oscillating system is called__________?
A. Oscillation
B. Damping
C. Resonance
D. None of these

325. The movement of any solvent across a semipermeable membrane is called__________?
A. Osmosis
B. Cataphoresis
C. Electrolysis
D. Electrophoresis

326. Which of the following noble gases is not present in atmosphere?
A. Argon
B. Helium
C. Radon
D. Xenon

327. Which of the following noble gases is abundant in air?
A. Neon
B. Helium
C. Argon
D. Methane

328. Which law states that “equal volumes of all gases, at the same temperature and pressure, have the same number of molecules?
A. Boyle’s law
B. Charles’ law
C. Gay-Lussac’s law
D. Avogadro’s law

329. Which of the following waves have smallest velocity in vacuum?
A. Ultraviolet
B. Sound
C. Infra-Red
D. Micro

330. By which process does the smell of cooking spread to all the rooms in a house?
A. Distillation
B. Diffusion
C. Decomposition
D. Displacement

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