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A few drops of ethanoic acid were added ...

A few drops of ethanoic acid were added to solid sodium carbonate. The observation made was that:

A

a hissing sound was produced

B

brown fumes evolved

C

brisk effervescence occurred

D

a pungent smelling gas was evolved

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The correct Answer is:
C
NA
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LAKHMIR SINGH & MANJIT KAUR-PERIODIC CLASSIFICATION OF ELEMENTS-Exercise
  1. Four students A,B,C and D were asked by their teacher to arrange the s...

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  2. On adding a few drops of universal indicator solution to three unknown...

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  3. A few drops of ethanoic acid were added to solid sodium carbonate. The...

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  4. Did Döbereiner’s triads also exist in the columns of Newlands’ Octaves...

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  5. What were the limitations of Döbereiner’s classification?

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  6. What were the limitations of Newlands’ Law of Octaves?

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  7. Use Mendeléev’s Periodic Table to predict the formulae for the oxides ...

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  8. Besides gallium, which other elements have since been discovered that ...

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  9. What were the criteria used by Mendeléev in creating his Periodic Tabl...

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  10. Why do you think the noble gases are placed in a separate group?

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  11. How could the Modern Periodic Table remove various anomalies of Mendel...

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  12. Name two elements you would expect to show chemical reactions similar ...

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  13. Name (a) three elements that have a single electron in their outermo...

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  14. (a) Lithium, sodium, potassium are all metals that react with water to...

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  15. In the Modern Periodic Table, which are the metals among the first ten...

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  16. By considering their position in the Periodic Table, which one of the ...

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  17. Which of the following statements is not a correct statement about the...

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  18. Element X forms a chloride with the formula XCl(2), which is a solid w...

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  19. Which element has (a) two shells, both of which are completely filled...

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  20. (a) What property do all elements in the same column of the Periodic T...

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