SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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change of colour, change of temperature, precipitate (solid) formed, gas released.
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change of colour, reversing back to original form, precipitate (solid) formed, gas released.
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Either A or B
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None of the above
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Detailed explanation-1: -Color Change. Production of an odor. Change of Temperature. Evolution of a gas (formation of bubbles) Precipitate (formation of a solid) 02-Apr-2021
Detailed explanation-2: -Potential signs that chemical reactions have occurred include a change in color, change in temperature, formation of a gas, and formation of a precipitate.
Detailed explanation-3: -Color. The changing of color of a substance is not necessarily an indicator of a chemical change. For example, changing the color of a metal does not change its physical properties. However, in a chemical reaction, a color change is usually an indicator that a reaction is occurring.
Detailed explanation-4: -Common physical changes include melting, change of size, volume, color, density, and crystal form.
Detailed explanation-5: -Change in Color. Formation of a Gas. Formation of a Precipitate. Change in Odor. Change in Temperature. Something is Burning. Light is Being Produced. 20-Jan-2023