Science Year 3 - Topic 8

Which substance changes red litmus paper to blue?

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Which property is correct about the fruit shown?

• Feels soapy

• Tastes sour

• Tastes bitter

Which of the following food has a bland taste?

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This substance has a pH value more than 7. What is the substance?

• Tamarind

• Salt water

• Bitter gourd

Which of the following is not a use of alkali in daily life?

• To produce carbonated drinks.
• To produce toothpaste.
• To produce medicine.

What is the change in the colour of red litmus paper to the drinking water in the bottle?

• Change to pink

• No change

• Change to blue

What is the way we can use to test the chemical properties of substance?

• Litmus paper

• Taste sensory

• Touch sensory

Cooking oil tested with litmus paper to know its properties. What is the properties of the cooking oil?

• Neutral

• Acidic

• Alkaline

Which of the following is the shape of litmus paper?

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Which of the following substance is alkaline?

• Mango juice

• Salt water

• Magnesia milk