Question

IV. SHORT ANSWER QUESTIONS-II
1. What is the colour of methyl orange, phenolphthalein and neutral litmus solution in: (a) lemon juice,
(b) dilute sodium hydroxide solution? Write your answer in tabular form.
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Answer 1

Answer:

a.lemon juice.

methyl orange. pink

phenolphtalein. colourless

litmus solution. red

b. dillute sodium hydroxide solution

methyl orange yellow

phenolphthalein reddish pink

litmus solution blue

Answer 2

Explanation:

Methyl orange- Red, Yellow

Phenolphthalein - Colourless , Pink

Neutral solution- Stays red, Stays blue

(a) Lemon juice is acidic in nature. So, methyl orange will turn red when added tolemon juice

Explanation: When the sodium hydroxide, which is a base, is mixed with phenolphthalein, it turns pink. When the base is neutralized by the acid, citric acid, which is present in lemons, the pink solution turns colorless

Lime juice turns blue Litmus to Red so lemon juice is acidic in nature that is lime juice contains an acid. The most common indicator used for testing acids and bases in the laboratory is Litmus. Litmus can be used in the form of Litmus solution or in the form of Litmus Paper.

(b) Sodium Hydroxide Dilution System

Powell Caustic Dilution & Blending Systems are designed for diluting 50% caustic solution to reduced strengths such as 30%, 25% or 10%. ... A Powell supplied heat exchanger will yield a dilute caustic temperature that is 5°F greater than the cooling water supply temperature.

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