Acids, Bases and Salts Quiz

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Questions and Answers

What are the two forms in which acids can be available?

Tablet and powder

Solid and aerosol

Solution and strips of paper (correct)

Liquid and gas

Which of the following bases is commonly found in lime water?

Sodium hydroxide

Calcium hydroxide (correct)

Potassium hydroxide

Ammonium hydroxide

Why is it not advisable to taste unknown substances?

They could be too sweet

They could harm us (correct)

They may not have any taste

They could be too sour

What color change would you expect when lemon juice is applied to blue litmus paper?

Turns red Signup and view all the answers

What is a potential source of ammonium hydroxide as mentioned in the content?

Window cleaner Signup and view all the answers

What do the substances that do not change the color of either red or blue litmus indicate?

They are neutral solutions. Signup and view all the answers

Which natural indicator is mentioned as being used for testing with litmus?

Turmeric Signup and view all the answers

How can lime water be prepared according to the activity?

By adding lime (chuna) to water. Signup and view all the answers

What is one of the purposes of making turmeric paper as described in the activity?

To create a greeting card design. Signup and view all the answers

What observation is expected when soap solution is applied to turmeric paper?

It will turn the paper blue. Signup and view all the answers

What is the taste of acids?

Sour Signup and view all the answers

Which statement is true regarding bases?

They turn red litmus blue. Signup and view all the answers

What type of solution is distilled water?

Neutral Signup and view all the answers

What do you call substances that show different colors in acidic and basic solutions?

Indicators Signup and view all the answers

What is formed when an acid and a base neutralize each other?

Salt Signup and view all the answers

What color does the China rose indicator turn in basic solutions?

Green Signup and view all the answers

What happens to the indicators when they are added to acidic solutions?

They turn dark pink (magenta). Signup and view all the answers

Why might solid baking soda give different results on dry litmus paper compared to a solution of the same?

Baking soda needs to be dissolved to show a pH change. Signup and view all the answers

What is acid rain?

Rain containing excess acids. Signup and view all the answers

Where do the acids that contribute to acid rain typically originate?

Industrial pollution and emissions. Signup and view all the answers

What solution should Dorji serve if a customer requests a neutral drink?

Sugar solution Signup and view all the answers

Which statement correctly explains the effect of an acid on blue litmus paper?

It turns blue litmus paper red. Signup and view all the answers

Which indicator is appropriate for determining whether a substance is acidic or basic?

Litmus paper Signup and view all the answers

Why is an antacid tablet taken when suffering from acidity?

It neutralizes gastric acid. Signup and view all the answers

What should happen when turmeric indicator is added to a sodium hydroxide solution?

It remains yellow. Signup and view all the answers

Study Notes

Acids, Bases and Salts

Acids are sour tasting substances that turn blue litmus paper red.
Bases are typically bitter and soapy, and they turn red litmus paper blue.
Neutral solutions are neither acidic nor basic. These solutions do not change the color of litmus paper.
Indicators are substances that change color in the presence of acids or bases. Examples include litmus paper (red and blue), turmeric, and China rose solution.
Turmeric paper turns reddish-brown in the presence of bases and remains yellow in the presence of acids.
China rose solution changes to dark pink (magenta) in acidic solutions, green in basic solutions, and remains reddish-orange when neutral.
Neutralization is the reaction between an acid and a base, which produces a salt and water. Salts can be acidic, basic, or neutral.
Acid rain is rain with a high concentration of acids. It forms when sulfur dioxide and nitrogen oxides in the atmosphere react with water to form sulfuric and nitric acids.
The process of neutralization is demonstrated when antacid tablets are used to neutralize stomach acid.
Calamine solution is used to neutralize the formic acid injected by ant stings.
Factory wastes are neutralized before being disposed of into water bodies to minimize harmful effects.
Distilled water is neutral and does not change the color of either red or blue litmus paper.

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Description

Test your knowledge on acids, bases, and salts with this quiz. Explore concepts such as indicators, neutralization reactions, and the properties of different solutions. Perfect for students learning about chemistry in class!