A piece of Ice was tied with a string to a water bucket‘s bottom, and the water bucket was filled with water with ice fully submerged in it. What would be the impact on the level of water when the ice melts away completely?

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A. The level of water will go up
B. The level of water will go down
C. The level of water will remain unchanged
D. The level of water will first increase then come to the previous on
✅ The correct answer is option B.

A long Rail (approximately 700 meters) made up of steel is struck to produce a sound. The person standing on the other end of the rail would hear in which among the following pattern?

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A. He listens the sound waves once propagated via steel
B. He listens the sound waves once propagated via air
C. He listens the sound waves twice, first propagated via steel and second propagated via air
D. He listens the sound waves twice, first propagated via air and second propagated via steel
✅ The correct answer is option C.

How does the Isotope of Iodine, Iodine-135 plays an important role in Nuclear Power Generation?

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A. It is used as a fuel supplement in some of the modern Nuclear Reactors
B. It is a bi-product of Nuclear Reaction which kills the neutrons and this inhibits the power formation
C. It is a moderator used actively in the Nuclear Reactors
D. It is an experimental substance for Nuclear Fusion
✅ The correct answer is option B.

In many countries with cold climates, the municipalities often sprinkle salt on icy roads in winter. Which among the following is the correct reason for this?

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A. The Salt inhibits the formation of Ice Crystals
B. The Salt lowers the Freezing Point of water
C. The Salt raises the freezing Point of water
D. The salt provides necessary friction to the tires of the vehicles
✅ The correct answer is option B.