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Y8 -Acids and Alkalis

Last updated 3 months ago

15 questions

Note from the author:

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Formative Generation Completed!

Formative Generation Completed!

Question 1

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Question 2

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Question 3

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Question 4

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Question 5

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Question 6

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Question 7

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Question 8

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Question 9

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Question 10

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Question 11

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Question 12

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Question 13

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Question 14

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Question 15

15.

What is the pH value at which a substance is neither acidic nor basic?

5

10

0

7

Acids taste sour. True or False?

True

False

What color does red litmus paper turn when dipped in a base?

Red

Blue

Yellow

Green

Which reactions are generally represented by alkalis?

Neutralization

Photochemical

Displacement

Redox

Bases increase the hydronium ion concentration. True or False?

True

False

What is the pH value of strong acids?

Around 7

Less than 3

Around 14

More than 11

Which type of substance can have a pH level of 14?

Neutral substance

Strong acid

Strong base

Weak acid

Which are examples of acids?

Vinegar

Soap

Lemon juice

Baking soda

Alkalis have a slippery feel. True or False?

True

False

What is common in the chemical structure of all acids?

Sulphur

Hydrogen

Oxygen

Nitrogen

What do strong acids do to litmus paper?

Turn it blue

Turn it red

Turn it green

No change

Which are examples of bases?

Ammonia

Milk

Lemon juice

Vinegar

Which type of substance can neutralize acids?

Strong acid

Base

Strong base

All the above

Concentrated acids are always stronger than diluted acids. True or False?

True

False

What happens when an acid reacts with a base?

Explosion

Freeze

Neutralization

Precipitation