SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Yellow to red
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Yellow to orange
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Red to yellow
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Pink to colorless
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Detailed explanation-1: -As a solution becomes less acidic, methyl orange changes colour from red to orange to purple, and vice versa when the acidity of the solution increases. The entire colour shift takes place in an acidic setting.
Detailed explanation-2: -Since potassium hydroxide, KOH, is a strong base, the pH of the solution will be higher than 7, which of course implies that adding methyl orange to the solution would change its color to bright yellow.
Detailed explanation-3: -Methyl orange has the property to color alkaline and neutral water yellow. If the water becomes acidic, it turns red immediately.
Detailed explanation-4: -When methyl orange indicator is added to sodium hydroxide (a base), It changes its colour from orange to yellow.