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Which of the following is correct ?...

Which of the following is correct ?

A

`Zn + HCl rarr ZnCl_2 + H_2`

B

`2 Zn + HCl rarr 2 ZnCl_2 + H-2`

C

`Zn+2 Hclrarr ZnCl_2 + H_2`

D

`Zn + 2 HCl rarr ZnCl_2 + H_2`

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BEYOND PUBLICATION-CHEMICAL EQUATIONS-EXERCISE
  1. Which of the following is correct ?

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  2. Downward arrow in chemical equation indicates-

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  3. The colour of the precipitate of lead iodide is-

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  4. which of the following is a skeleton reaction?

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  5. CaO reacts with water to form……….

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  6. Ammonia is formed by the reaction of gases…………

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  7. A solution of potassium iodide reacts with lead nitrate to give…..

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  8. When a smal piece of zinc metal is added to a solution of Copper sulph...

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  9. The chemical reaction in which energy is absorbed to form a new compou...

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  10. The substances that are present on left side of a chemical equation ar...

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  11. A chemical equation should be balanced because the law……. Should be v...

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  12. C+O2toCO2+Q. This is reaction.

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  13. Ca(OH)2+CO2toCaCO3+H2O. In this reaction shiny finish to walls is due ...

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  14. Fe2O3 + 2Al -rarr Al2O3 + 2Fe. ఈ చర్య దేనికి ఉదాహరణ?

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  15. Fill in the blanks: C6H12O6+6O2 to......+6H2O+Q

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  16. Pb(NO3)2 +…………….. = PbI2+2KNO3

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  17. NaCl + AgNO3rarr…………..+ NaNO3

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  18. Fill in the blanks: Na2SO4+...... to BaSO4 +2NaCl

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  19. Balance the following chemical equations. i) Zn((s))+AgNO(3(aq))rarr...

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  20. If some amount of energy is released in a chemical reaction, then it i...

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