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Class 9 Chemistry Chemical Reactivity


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Class 9Class 10First YearSecond Year
10.Whysilverandgoldareleastreactive?10. Why silver and gold are least reactive?

14. Which metal is used for metal work?
14. Which metal is used for metal work?

14.Whichmetalisusedformetalwork?14. Which metal is used for metal work?

1. Which one metal belongs to Alkaline earth metal?(a) \mathrm{B} (b) \mathrm{Bi} (c) \mathrm{Br} (d) \mathrm{Ba}
1. Which one metal belongs to Alkaline earth metal?(a)  \mathrm{B} (b)  \mathrm{Bi} (c)  \mathrm{Br} (d)  \mathrm{Ba}

1.WhichonemetalbelongstoAlkalineearthmetal?(a)B(b)Bi(c)Br(d)Ba1. Which one metal belongs to Alkaline earth metal?(a) \mathrm{B} (b) \mathrm{Bi} (c) \mathrm{Br} (d) \mathrm{Ba}

2. Which one of the following metal burns with a brick red flame?(a) Sodium(b) Magnesium(c) Iron(d) Calcium
2. Which one of the following metal burns with a brick red flame?(a) Sodium(b) Magnesium(c) Iron(d) Calcium

2.Whichoneofthefollowingmetalburnswithabrickredflame?(a)Sodium(b)Magnesium(c)Iron(d)Calcium2. Which one of the following metal burns with a brick red flame?(a) Sodium(b) Magnesium(c) Iron(d) Calcium

6. Define following with examples: -1. Cation1
6. Define following with examples: -1. Cation1

6.Definefollowingwithexamples:1.Cation16. Define following with examples: -1. Cation1

15. Why magnesium is harder than sodium?
15. Why magnesium is harder than sodium?

15.Whymagnesiumisharderthansodium?15. Why magnesium is harder than sodium?

3. Why nitrogen forms compounds with alkaline earth metals directly?
3. Why nitrogen forms compounds with alkaline earth metals directly?

3.Whynitrogenformscompoundswithalkalineearthmetalsdirectly?3. Why nitrogen forms compounds with alkaline earth metals directly?

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