Question

Phenolphthalein indicator gives dark pink color when it comes in the contact of citric acid.

True

False​

Answer 1

Required Answer:

$\underline{\boxed{\sf{False }}}. \: \red{\bigstar}$

Citric acid is an acid. And, when phenolphthalein comes in the contact of citric acid , it becomes colorless. When it comes with the contact of any base , it gives dark pink colour. Hence, this statement is incorrect.

★ Correct statement:

Phenolphthalein indicator gives dark pink color when it comes in the contact of base .

Science at ease!

• ❒ Indicators are those substances that are used to recognize whether the substance is acidic or basic in nature.

• ❒ Indicators change their colour on coming in contact with the substance we want to test.

❒ Natural Indicators :

☛ Made from the substances found in our nature like leaf, flowers etc.

☛ Examples : Litmus, china rose, turmeric.

❒ Synthetic Indicators :

☛ Made from dyes in laboratories and factories.

☛ Examples : Phenolphthalein, Methyl orange.

About acids :

• Acids are sour in taste.
• They are corrosive.
• It turns the blue litmus paper red.
• Hydrochloric acid, sulphuric acid, acetic acid, oxalic acid are the examples of acids.

About bases :

• Bases are bitter in taste.
• They are soapy to touch.
• It turns red litmus paper blue.
• Sodium hydroxide, calcium hydroxide and so on are the examples of bases.

Answer 2

(ﾉ◕ヮ◕)ﾉ*.✧Answer:-

False

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