Answer: Option (c) is the correct answer.
Explanation:
Entropy is defined as the degree of randomness. This means that more is the number of collisions taking place between atoms of a substance more will be the randomness.
Therefore, more will be the entropy of substance. We cannot measure the entropy but we can measure the change in entropy of a substance.
A thermometer is a glass tube that contains a liquid column generally mercury, and it is usually used to measure the temperature of human body.
A calorimeter is a device or apparatus that is used in a chemical reaction to measure the amount of heat involved.
Therefore, we can conclude that the student can't measure entropy directly, only an entropy change.
Crops of the crystals are a part of the same crystal which might have different chemical structures leading to different colors.
<u>Explanation:</u>
Crops of the crystals are the parts of the crystals. And even being a part of the same crystal, the crops of the crystals can have different colors from the other crops of the crystal.
The color of crops of crystals are dictated by the chemical structure and their physical characteristic (crystalline or formless). The shape and the size of its crystalline structure, likewise the chance of polymorphism, may impact its shading.
The answer is option a, that is " <span>electromagnetic repulsions</span><span>".
The sun generates energy by nuclear fusion, and converts a part of its mass into energy and nuclear fusion is the source of all energy that is released by the sun. The two things which are required for the process of nuclear fusion are high temperature and the high densities.
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Answer:
B) water and salt is the result of neutralization reaction
