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If the gas liberated in an experiment al...

If the gas liberated in an experiment allows the burning splinter to continue burning more brightly in its presence, the gas is ………………

A

oxygen

B

nitrogen

C

hydrogen

D

carbon dioxide

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BEYOND PUBLICATION-CHEMICAL EQUATIONS-EXERCISE
  1. The correct observation made by the student after putting clean pieces...

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  2. Burning of magnesium crackers is a reaction of …………….

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  3. If the gas liberated in an experiment allows the burning splinter to c...

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  4. Why should we write the arrow tat pointing towards products while ?

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  5. What should we do, if two or more reactants are there writing a chemic...

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  6. Why should we balance a chemical equation?

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  7. What is a chemical equation?

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  8. By a balanced chemical equation, what do we know about atoms ?

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  9. How many steps are there in balancing the equation ?

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  10. Is there any imp0rtance of molecular formulae in writing the equation ...

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  11. How do the co-efficients of the substances would be, while balancing t...

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  12. Can we change the ratio of atoms in the molecules of the substances wh...

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  13. Sitara told that a chemical reaction occurs in ripening of grapes. Is ...

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  14. X - Y leftarrow Z. Raja wrote a chemical equation like so ? What are t...

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  15. Zn + HCl rarr ZnCl2 + H2.Is it a balanced equation ? Give the reason.

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  16. Rupa says "xx+ y rarr xxy +Q indicates an endothermic reaction". Can y...

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  17. 4 Agcl rarr 4 Ag + 2 Cl2. Is it a balanced equation ? Yet it is not in...

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  18. An arrow pointing downwards in a chemical reaction shows……

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  19. A solution of sodium carbonate reacts with Ca(OH)2 to give

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  20. Which reaction is a reversible reaction ?

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