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LAKHMIR SINGH & MANJIT KAUR-PHYSICAL AND CHEMICAL CHANGES-EXERCISE
- Fill in the following blanks with suitable words : When carbon dioxi...
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- Fill in the following blanks with suitable words : The two methods b...
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- Fill in the following blanks with suitable words : The process of de...
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- Fill in the following blanks with suitable words : The presence of ...
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- Fill in the following blanks with suitable words : Some susbtances c...
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- Why is an Iron grill painted frequently ?
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- Explain why, iron pipes for carrying water are coated with zinc.
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- Why are the tools and machine parts made of iron smeared with grease o...
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- Explain how, painting of an Iron gate prevents it from rusting.
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- Explain why, rusting of Iron objects is faster in coastal areas than i...
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- What is meant by galvanisation? Why is it done?
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- State two ways to prevent the rusting of iron.
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- What is stainless steel ? How is stainless steel made ? State an impor...
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- State three differences between a physical change and a chemical chang...
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- Write a word equation to represent the process of rusting of iron. Als...
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- Explain why, explosion of a firework (such as cracker) is said to be a...
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- Explain why, melting of ice to form water is said to be a physical cha...
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- What is meant by crystallisation ? State its one use.
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- Describe how, crystals of copper sulphate are prepared.
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- Give example of a chemical change which occurs by the action of heat.
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