Optical Fiber works on the principle of
(A) Diffusion
(B) Refraction
(C) Total Internal Reflection
(D) Scattering
Which of the following is an example of diffusion of gases?
(A) Perfume Smell
(B) Food aroma
(C) Fragrance of incense sticks
(D) All of the above
Which of the following is an epidemic and endemic disease?
(A) polio
(B) measles
(C) Typhoid
(D) Cholera
Which vitamin among the following is crucial for blood clotting?
(A) Vitamin K
(B) Vitamin D
(C) Vitamin A
(D) Vitamin E
The cathode rays can be deflected-
(A) Both electric and magnetic field
(B) Not by any field
(C) Only by electric field
(D) Only by magnetic field
When a soap bubble is charged then-
(A) it does not undergo any change in size
(B) it contracts
(C) it expands
(D) None of these
Zero degree centigrade is equal to what degree Fahrenheit?
(A) 100°F
(B) 30°F
(C) 34°F
(D) 32°F
Which of the following is the third stage in the metamorphosis of a butterfly?
(A) Egg
(B) Pupa
(C) Adult
(D) Larva
The first protocol to ban the emissions of chlorofluorocarbons in the atmosphere was made in
(A) Montreal
(B) Osaka
(C) Geneva
(D) Florida
The size of the earth in the sequence of planets:
(A) Fifth
(B) Seventh
(C) Third
(D) Fourth
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