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A Level Chemistry OCR A Questions & 100% correct Answers- Latest Test | Graded A+ | Passed CA$17.12   Add to cart
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A Level Chemistry OCR A Questions & 100% correct Answers- Latest Test | Graded A+ | Passed
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Ammonium ion Ξ -:- NH₄⁺ Nitrate ion Ξ -:- NO₃⁻ Nitric Acid Ξ -:- HNO₃ Covalent bond Ξ -:- A covalent bond is the strong electrostatic attraction between a shared pair of electrons and the nuclei of the bonded atoms Dative covalent bond Ξ -:- A dative covalent bond is a sha...

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  • August 26, 2024
  • 29
  • 2024/2025
  • Exam (elaborations)
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E x c e l l e n c e i s k e y | 2 0 2 0 2 5 ~ P a g e |1




A Level Chemistry OCR A Questions &
100% correct Answers- Latest Test |
Graded A+ | Passed
Ammonium ion

Ξ -:- NH₄⁺



Nitrate ion

Ξ -:- NO₃⁻



Nitric Acid

Ξ -:- HNO₃



Covalent bond

Ξ -:- A covalent bond is the strong electrostatic attraction between a shared pair of

electrons and the nuclei of the bonded atoms



Dative covalent bond

Ξ -:- A dative covalent bond is a shared pair of electrons where both electrons are

from the same atom



Cyanide ion

Ξ -:- CN⁻



Shape of molecule with *2* bonded electron pairs

Ξ -:- Linear, 180 °



Shape of molecule with *3* bonded electron pairs



26/08/2024 | © Copyright- This work may not be copied for profit.

, E x c e l l e n c e i s k e y | 2 0 2 0 2 5 ~ P a g e |2


Ξ -:- Triagonal planar, 120 °



Shape of molecule with *5* bonded electron pairs

Ξ -:- Triagonal bipyramidal, 90 ° and 120 °



Shape of molecule with *6* bonded electron pairs

Ξ -:- Octrahedral, 90 °



Shape of molecule with *4* bonded regions *only*

Ξ -:- Tetrahedral, 109.5 °



Shape of molecule with *4* bonded electron pairs, *2* bonded regions

Ξ -:- Linear, 180 °



Shape of molecule with *4* bonded electron pairs, *3* bonded regions

Ξ -:- Triagonal planar, 120 °



Shape of molecule with *4* bonded electron pairs *and* lone pairs

Ξ -:- Non-linear or pyramidal, angle reduced by 2.5 ° for each lone pair



hydroxide ion

Ξ -:- OH⁻



Sulfate ion

Ξ -:- SO₄²⁻



Carbonate ion

Ξ -:- CO₃²⁻




26/08/2024 | © Copyright- This work may not be copied for profit.

, E x c e l l e n c e i s k e y | 2 0 2 0 2 5 ~ P a g e |3


Ammonium ion

Ξ -:- NH₄⁺



Zinc(II) ion

Ξ -:- Zn²⁺



Silver(I) ion

Ξ -:- Ag⁺



Number of particles

Ξ -:- Mols x Avagadro's number



Volume

Ξ -:- Mols x Molar gas volume



Acid

Ξ -:- A species that releases H⁺ ions in aqueous solution.



Activation energy (Ea

Ξ -:- The minimum energy required to start a reaction by breaking of bonds



Actual yield

Ξ -:- The amount of product obtained from a reaction



Addition polymerisation

Ξ -:- Formation of a very long molecular chain (addition polymer), by repeated

addition reactions of many unsaturated alkene molecules (monomers)



Adsorption



26/08/2024 | © Copyright- This work may not be copied for profit.

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