Acid Bases

The Substance which turns Blue litmus red is ......................

• Basic

• Acidic

• Neutral

• All of these

Which of the following is a true for an acid?

• Blue Litmus paper staying blue

• Red Litmus paper staying red

• Phenolphthalein being purple

• Bromothymol blue turning blue

Tags

NGSS.MS-PS1-2

Which method is recommended to dilute an acid

• An acid is added to water

• Water added to acid

Which of the following is a property of both acids and bases?

• They both taste sour.

• They both feel slippery.

• They both conduct electricity.

• They both turn litmus paper the same color.

Tags

DOK Level 2: Skill/Concept

What is the effect of adding an acid to a base?

• The solution becomes more acidic.

• The solution becomes more basic.

• The solution becomes neutral.

• The solution remains unchanged.

Tags

DOK Level 2: Skill/Concept

Bases, also known as ​ (a)   will turn litmus paper ​ (b)   . This is because they have a pH ​ (c)   . They taste ​ (d)   .

• alkali and OH-

• blue

• above 7

• bitter

• below 7

• H+

• red

• sour

Tastes bitter: (a)  

• acids

• bases

• neutral

• pH paper

Which one of the following is an example of a base? (a)  

• orange juice

• dish soap

• vinegar

• lemons

Acids react with metals and ​ (a)   , taste ​ (b)   , and turn ​ (c)   litmus paper ​ (d)   .

• carbonates

• sour

• blue

• red

• slippery

• bitter

• sweet

Bases do not react with ​ (a)   or carbonates, taste ​ (b)   , feel ​ (c)   , and turn ​ (d)   litmus paper ​ (e)   .

• metals

• bitter

• slippery

• red

• blue

• sour

• sweet

• dry