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Name the particle which have 18 electron...

Name the particle which have 18 electrons , 18 neutrons and 17 protons in it .

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Soaps are not suitable for washing clothes with hard water because of two reasons :
(i) Soap reacts with the calcium and magnesium ions present in hard water to form insoluble precipitate called scum. This results in the wastage of soap.
(ii) The sticky scum sticks to the clothes being washed and interferes with the cleaning ability of soap. This makes the cleaning of clothes difficult.
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SWAN PUBLICATION-CARBON AND ITS COMPOUNDS-ADDITIONAL IMPORTANT QUESTIONS(SHORT ANSWER TYPE QUESTIONS)
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  6. The symbols of some of the ions are given below : K+ , Al3+ , Br- , O2...

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  7. Complete the following equation : CH3COOH + NaHCO3 rarr

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  8. What do we call those particles which are formed : by the loss of elec...

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  9. An element A have a valancy +1. what is the formula of sulphate of A?

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  10. An element B have a valancy +2. what is the formula of nitrate of B?

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  11. The formula of the chloride of metal is MCl2. What will be the formula...

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  12. (a) Mention the experimental conditions involved in obtaining ethene f...

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  13. What do we call those particles which are formed : by the gain of elec...

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  14. What is a dehydration reaction ? Explain this reaction with the help o...

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  15. Write six uses of ethyl alcohol.

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  16. An element P has a valancy of 4. what is the formula of oxide of P ?

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  17. Name the particle which have 18 electrons , 18 neutrons and 17 protons...

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  18. Name the particle which have 10 electrons , 11 protons and 12 neutrons...

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  19. What is meant by the term "functional group".

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  20. Why have detergents replaced soap as a washing agent ?

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