Science Practice Quiz 11

Q1.In the activity described, which beaker initially contained copper sulphate solution?

A. Beaker A B. Beaker B C. Beaker C D. Beaker D

Q2.What taste is characteristic of substances containing acids?

A. Sweet B. Salty C. Sour D. Bitter

Q3.If someone is suffering from acidity after overeating, which of the following remedies would be suggested based on the text?

A. Lemon juice B. Vinegar C. Baking soda solution D. Saltwater

Q4.The effectiveness of a remedy like baking soda solution for acidity is based on which fundamental property of acids and bases?

A. Their ability to dissolve fats B. Their ability to nullify each other’s effect C. Their ability to increase stomach acid production D. Their ability to act as a stimulant

Q5.What color change does a base cause when tested with red litmus paper?

A. Red to green B. Red to blue C. Blue to red D. No change

Q6.Which of the following is mentioned as a natural indicator, alongside litmus, in the provided text?

A. Methyl orange B. Phenolphthalein C. Turmeric D. Red cabbage leaves

Q7.When soap, which is basic in nature, is scrubbed on a curry stain on a white cloth, what color does the stain become?

A. Yellow B. Blue C. Reddish-brown D. Green

Q8.From which organism is litmus solution, a purple dye commonly used as an indicator, extracted?

A. Algae B. Fungi C. Lichen D. Moss

Q9.Lichen, the source of litmus solution, belongs to which division of plants?

A. Bryophyta B. Pteridophyta C. Thallophyta D. Angiospermae

Q10.What is the color of litmus solution when it is neither acidic nor basic?

A. Red B. Blue C. Purple D. Yellow

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Science Practice Quiz 11