Acids and Bases Quiz_CLASS 7

The acid present in vinegar is:

• Citric acid

• Acetic acid

• Formic acid

• Lactic acid

Which of the following is a base?

• Lactic acid

• Calcium hydroxide

• Citric acid

• Oxalic acid

Which of these indicators is extracted from lichens?

• Turmeric

• China rose

• Litmus

• Phenolphthalein

Litmus turns red in:

• Basic solution

• Acidic solution

• Neutral solution

• Soap solution

Which of these tastes bitter and feels soapy?

• Acids

• Bases

• Salts

• Neutral solutions

The base found in milk of magnesia is:

• Sodium hydroxide

• Magnesium hydroxide

• Potassium hydroxide

• Calcium hydroxide

Neutral solutions:

• Turn blue litmus red

• Turn red litmus blue

• Do not affect litmus colour

• Turn both blue and red litmus to green

Turmeric turns red in:

• Acidic solution

• Basic solution

• Neutral solution

• Salt solution

China rose indicator turns acidic solutions:

• Green

• Dark pink/magenta

• Blue

• Yellow

Name the acid found in ant’s sting:

• Lactic acid

• Formic acid

• Citric acid

• Acetic acid