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Substance used to make hard water soft....

Substance used to make hard water soft.

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NAVNEET PUBLICATION-SUBSTANCES IN COMMON USE-EXERCISE
  1. Answer the following question: State two uses of sodium carbonate (wa...

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  2. Answer the following question: Which of the following compounds is us...

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  3. Substance used to make hard water soft.

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  4. Chemical formula of bleaching powder

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  5. Answer the following questions: What is meant by water of crystalliza...

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  6. Answer the following question: What is meant by soap?

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  7. What are detergents?

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  8. Which chemicals and apparatus will you use in the laboratory for makin...

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  9. Answer the following question: Define radioactivity: What are radioac...

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  10. What is meant by radioactivity?

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  11. Answer the following question: Mention the names of four scientists w...

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  12. Answer the following question: Give four examples of radioactive elem...

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  13. Answer the following question: Give four examples of radioactive elem...

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  14. Answer the following question: Give four examples of radioactive elem...

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  15. State properties of alpha rays.

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  16. Answer the following question: State any three characterstic properti...

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  17. Answer the following question: State any three characterstic properti...

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  18. Answer the following question: When is the nucleus said to be unstabl...

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  19. Answer the following question: State three used of radiactive isotope...

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  20. Give the uses of radioactive isotopes in Field of agriculture.

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