Neutralization Quiz for 7th Class Students

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Questions and Answers

What happens when soap solution is dropped on blue litmus paper?

  • It turns red
  • It turns green
  • It turns purple
  • It remains blue (correct)

What does the red litmus turning blue when in contact with ammonia indicate?

  • Ammonia is neutral
  • Ammonia is basic (correct)
  • Ammonia is acidic
  • Ammonia is a gas

How does turmeric behave when washed with soap on white clothes?

  • It turns red (correct)
  • It turns green
  • It has no effect
  • It turns black

Why does dropping nitric acid on eggshell release carbon dioxide gas?

<p>The acid causes a chemical reaction leading to gas release (A)</p> Signup and view all the answers

Is urea acidic, basic, or neutral in nature?

<p>Acidic (B)</p> Signup and view all the answers

How can the sting of a wasp, which is basic, be treated?

<p>Treating with an acid to neutralize the sting (A)</p> Signup and view all the answers

Why are acids not stored in a metal container?

<p>Because acids react with metals and can corrode them (A)</p> Signup and view all the answers

How can you identify a basic solution using litmus paper?

<p>It changes red litmus paper to blue (B)</p> Signup and view all the answers

When drops of lemon juice are put on blue litmus paper, what color change occurs?

<p>Blue litmus turns red (B)</p> Signup and view all the answers

What property of soap solution makes it useful for cleaning acids?

<p>High alkalinity as a base that can neutralize acids (C)</p> Signup and view all the answers

Flashcards

Soap solution effect on blue litmus

A soap solution will not change the color of blue litmus paper.

Ammonia effect on red litmus

Ammonia turns red litmus paper blue, indicating a basic nature of ammonia.

Turmeric on soap-stained clothes

Turmeric turns red when in contact with soap on white clothes, showing that soap is basic in nature.

Nitric acid on eggshell

Nitric acid reacting with eggshell releases carbon dioxide gas due to a chemical reaction.

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Urea nature

Urea is acidic in nature.

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Wasp sting treatment

A wasp sting, which is basic, can be treated with an acid to neutralize the sting.

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Acid storage

Acids should not be stored in metal containers because they react with metals and can corrode them.

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Identifying a basic solution using litmus paper

A basic solution turns red litmus paper to blue.

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Lemon juice on blue litmus

Lemon juice turns blue litmus paper red, indicating its acidic nature.

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Soap's cleaning property

Soap's high alkalinity makes it useful for cleaning acids by neutralizing them.

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