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Y8 -Acids and Alkalis

Poslední aktualizace 4 months ago

15 Dotazy

Poznámka od autora:

Formative Generation Completed!

Instrukce

Formative Generation Completed!

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Otázka 1

1.

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

5

10

0

7

Otázka 2

2.

Acids taste sour. True or False?

Skutečný

Falešný

Otázka 3

3.

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

Red

Blue

Yellow

Green

Otázka 4

4.

Which reactions are generally represented by alkalis?

Neutralization

Photochemical

Displacement

Redox

Otázka 5

5.

Bases increase the hydronium ion concentration. True or False?

Skutečný

Falešný

Otázka 6

6.

What is the pH value of strong acids?

Around 7

Less than 3

Around 14

More than 11

Otázka 7

7.

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

Neutral substance

Strong acid

Strong base

Weak acid

Otázka 8

8.

Which are examples of acids?

Vinegar

Soap

Lemon juice

Baking soda

Otázka 9

9.

Alkalis have a slippery feel. True or False?

Skutečný

Falešný

Otázka 10

10.

What is common in the chemical structure of all acids?

Sulphur

Hydrogen

Oxygen

Nitrogen

Otázka 11

11.

What do strong acids do to litmus paper?

Turn it blue

Turn it red

Turn it green

No change

Otázka 12

12.

Which are examples of bases?

Ammonia

Milk

Lemon juice

Vinegar

Otázka 13

13.

Which type of substance can neutralize acids?

Strong acid

Base

Strong base

All the above

Otázka 14

14.

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

Skutečný

Falešný

Otázka 15

15.

What happens when an acid reacts with a base?

Explosion

Freeze

Neutralization

Precipitation