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Why there is absorption of energy in cer...

Why there is absorption of energy in certain chemical reactions and release of energy in other reactions?

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VGS PUBLICATION-BRILLIANT-CHEMICAL BONDING-EXERCISE
  1. Is there any attraction between atoms?

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  2. In pH sclae what is p and what is its meaning?

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  3. Why there is absorption of energy in certain chemical reactions and re...

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  4. Where the absorbed energy goes?

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  5. Is there any relation to energy and bond formation between atoms?

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  6. What could be the reason for the change in reactivity of elements?

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  7. What could be the reason for that?

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  8. What is specific heat? write the specific heat of copper?

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  9. What have you observed about the main groups?

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  10. Why do atoms of elements try to combine and form molecules?

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  11. Is it accidental that IA to VIIA main group elements during chemical r...

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  12. How do cations and anions of an ionic compound exist in its solid stat...

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  13. Do you think that pairs of Na^+Cl^− as units would be present in the s...

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  14. Which inventions is most important related to micro organisms? Can you...

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  15. Can you say what type of bond exists between atoms of nitrogen molecul...

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  16. What do you understand from bond lengths and bond energies?

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  17. Are the values not different for the bonds between different types of ...

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  18. What is the bond angle in a molecule?

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  19. How is HCl molecule formed?

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  20. Explain the formation of ionic compounds NaCl, MgCl2, Na2O and AlCl3 t...

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