Please select a subject first
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What is compostable plastic?
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What do you mean by microplastics?
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How do you obtain a spectrum of light?
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Why do we see white color in Newton’s disc, when we rotate it very fast?
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PLA spoon: compostable: Plastic spoon: ______
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Assertion and Reason
A: It is good to avoid plastics.
R: Plastics end up polluting the environment.
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A bucket made of plastic does not rust like a bucket made of iron. Why?
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When water is added to ______ there will be an evolution of a lot of heat along with the formation of slaked lime.
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A lump of curd is the ______ that is obtained by the chemical reaction between hot milk and lemon juice.
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Explain indicators of a chemical change with examples.
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An organelle seen in bacteria and cell of higher organisms is ______.
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What is the endoplasmic reticulum?
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Name the triangular piece of glass that splits white light into different colours.
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Why danger lights in vehicles are red in colour?
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Respiration is a ______ change.
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True or False. If false, give the correct answer.
Tarnishing of silver is an example of endothermic change.
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Mention any two exothermic reactions.
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Assertion: A drop of petrol when touched with finger gives a chill feeling.
Reason: The above phenomenon is an endothermic one.
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True (or) False. If false write the correct answer.
Classification helps to know the origin and evolution of an organism
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