science test class 7 th ch 5

copper oxide +hydrochloric acid

• copper chloride

• zine sulphate

• sodium sulphate

process of acid + base

• neutralization

• acid reaction

• base reaction

when acid dropped on turmeric

• It turn red

• no difference

• turn yellow

when acid is dropped on blue litmus

• turn red

• turn yellow

• no change

when base is dropped on red litmus

• turn red

• turn blue

• turn yellow

Which acid is present in vinegar?

• Formic acid

• Acetic acid

• Citric acid

• Malic acid

In which of the following is ascorbic acid present?

• Fruits and vegetables

• Tea and coffee

• Milk

• Ants

From which of the following is the natural indicator litmus extracted?

• Mycorrhiza

• Lichens

• Mucor

• Mycelia