In a very low temperature which from the following will freeze at last?
A. River water
B. Canal water
C. Sea water
D. Water in a lake
When white light is passed through a prism, it splits into ___ colors.
A. 5
B. 6
C. 7
D. 8
Which from the following is true for “Sound”?
A. Sound cannot travel through a vaccum
B. Sound cannot travel through gases
C. Sound cannot travel through liquids
D. Sound cannot travel through solids
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