What do you observe when you drop a few drops of acetic to test tubes containing
(a) phenolphthalein
(b) distilled water
(c) universal indicator
(d) sodium hydrogen carbonate powder

Solution

Acetic acid is a weak acid. The following changes will occur when a few drops of acetic acid are added to the given solutions:
i. Phenolphthalein remains colourless, as acetic acid shows a change in colour in basic substances.
ii. Acetic acid dissolved in water
iii. Acetic acid turns the colour of the universal indicator to pale orange.
iv. When added to sodium hydrogen carbonate powder, acetic acid causes effervescence because of the evolution of carbon dioxide gas in the process.
$CH subscript 3 COOH space left parenthesis aq right parenthesis space plus space NaHCO subscript 3 left parenthesis straight s right parenthesis space rightwards arrow space CH 3 COONa left parenthesis aq right parenthesis space plus space straight H subscript 2 straight O left parenthesis straight l right parenthesis space plus space CO subscript 2 space left parenthesis upwards arrow right parenthesis$

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Control And Coordination

What do you observe when you drop a few drops of acetic to test tubes containing
(a) phenolphthalein
(b) distilled water
(c) universal indicator
(d) sodium hydrogen carbonate powder

Some More Questions From Control and Coordination Chapter

Choose the olfactory indicators and give their characteristics: red cabbage extract, onion, vanilla extract, litmus, clove oil.

What do you understand by concentrated and dilute acids?

How do metals react with bases?

What is a neutralization reaction? Give some examples.

What are non-metallic oxides? Substantiate your answer.

Name four acids and bases. Write their formulae.

Name the various kind of oxides and mention their properties.

What are acids? How are they produced?

Mention important characteristics of acids.

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

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Control And Coordination

What do you observe when you drop a few drops of acetic to test tubes containing(a) phenolphthalein(b) distilled water(c) universal indicator(d) sodium hydrogen carbonate powder

Some More Questions From Control and Coordination Chapter

Choose the olfactory indicators and give their characteristics: red cabbage extract, onion, vanilla extract, litmus, clove oil.

What do you understand by concentrated and dilute acids?

How do metals react with bases?

What is a neutralization reaction? Give some examples.

What are non-metallic oxides? Substantiate your answer.

Name four acids and bases. Write their formulae.

Name the various kind of oxides and mention their properties.

What are acids? How are they produced?

Mention important characteristics of acids.

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

What do you observe when you drop a few drops of acetic to test tubes containing
(a) phenolphthalein
(b) distilled water
(c) universal indicator
(d) sodium hydrogen carbonate powder