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Hydrogen and oxygen combine to form two ...

Hydrogen and oxygen combine to form two compounds, water and hydrogen peroxide. If the percentage of oxygen is 88.89 in water and 94.12 in hydrogen peroxide, show that the data support law of multiple proportions.

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This law was proposed by Dalton in 1803 . According to this law , if two elements combune to form more than one compounds ,the masses of one element that combine with a fixed mass of the other element, are in the ratio of small whole number. For exemple, hydrogen combines with oxygen to form two compounds ,namely, water and hydrogen peroxide. Here, the masses of oxygen (i.e, 16g and 32g) which combine with a fixed mass of hydrogen (2g) bear a simple raio, i.e, 16 :32 or 1 :2 . An element forms two oxides .In one oxide ,one gram of the oxide containd 0.5g of the element. In another oxide, 4g of the oxide contains 0.8g of the element . Show that these data confirm the law of multiple proportion.

ICSE-SELF ASSESSMENT PAPER 1-Questions
  1. Which hybrid orbitals are used by carbon atoms in the following molecu...

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  2. Which hybrid orbitals are used by carbon atoms in the following molecu...

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  3. Hydrogen and oxygen combine to form two compounds, water and hydrogen ...

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  4. 1470 cm^3 of a gas is collected over water at 303 K and 74.4 cm of Hg....

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  5. State any three limitations of Bohr.s model?

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  6. Calculate the heat of formation of anhydrous Al2Cl6 from the following...

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  7. Calculate the heat of formation of anhydrous Al2Cl6 from the following...

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  8. Calculate the heat of formation of anhydrous Al2Cl6 from the following...

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  9. Calculate the heat of formation of anhydrous Al2Cl6 from the following...

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  10. What do you understand by a spontaneous process ? Give two examples

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  11. Define Gibb.s free energy and free energy change.

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  12. What are green chemicals?

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  13. What do you understand by COD?

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  14. Name three green house gases.

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  15. What are Grignard reagents and how are they prepared ? What happens wh...

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  16. Compare atomic orbitals with molecular orbitals.

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  17. Balance the following equation in basic medium. Cr(OH)(3)+IO(3)^(-)t...

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  18. Calculate the oxidation number of the underlined atom in the following...

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  19. Calculate the oxidation number of the underlined atom in the following...

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  20. Calculate the oxidation number of the underlined atom in the following...

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