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As Lemon Juice is an Acid, the colour of the Red Litmus Paper will stay the same.
it turns blue litmus paper red
Litmus become blue in contact with basic substances.
Moist red litmus paper will turn blue when exposed to magnesium oxide because magnesium oxide is a basic compound. The red litmus paper will change color to blue to indicate the presence of a base.
Litmus paper turns red in acidic solutions.
Alkali turns litmus paper blue.
The colour is not changed.
litmus paper turns blue litmus red when tested on an acid and red litmus blue when tested on a base
The natural color of litmus paper is purple. It turns red in acidic solutions and blue in basic solutions.
When white litmus paper is dipped in potassium permanganate, it does not change color, as potassium permanganate is a neutral solution and does not affect the acidity or basicity of the litmus paper. White litmus paper is designed to indicate pH changes, turning red in acidic conditions and blue in basic conditions. Since potassium permanganate itself is not acidic or basic, the litmus paper remains unchanged.
Litmus paper
Litmus does not change color in sugar solution.