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Chemical reaction occurs with the ------...

Chemical reaction occurs with the ------------- of chemical bonds-

A

formation

B

breaking

C

both A and B

D

none

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BEYOND PUBLICATION-CHEMICAL EQUATIONS-EXERCISE
  1. Identify the exothermic reaction among the following-

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  2. Atomic mass of oxygen-

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  3. Chemical reaction occurs with the ------------- of chemical bonds-

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  4. The metal formed when zinc react with AgNO3 is-

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

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  6. The formula of hypochlorous acid is-

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  7. Every gas at STP occupies 22.4 litres and it is known as.

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  8. Burning of petroleum gas (LPG) ------- change.

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  9. Identify the balance equations among.

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  10. In exothermic reaction heat energy is-

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  11. The process of preparing slaked lime by adding water to quicklime is t...

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  12. Zn+2HCl rarr ZnCl(2)+H(2) is an example for ……………….

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  13. The correct observation made by the student after putting clean pieces...

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

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

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

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

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  18. Why should we balance a chemical equation?

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  19. What is a chemical equation?

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

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