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- 1. Multiple ChoiceWhich of the element of group 2 the correct one when down group?Be, Mg, Ca, Sr, BaBa, Mg, Ca, Sr, BeBa, Ca, Mg, Sr, BeBe, Ca, Mg, Sr, Ba
- 2. Multiple ChoiceBeryllium compounds tends to form ______ compouds rather than ________compounds.covalent, ionicionic, covalentcovalent, metallicionic, metallic
- 3. Multiple ChoiceWhich one covalent compound?BeBr2MgOCaF2SrSO4
- 4. Multiple ChoiceWhich one covalent compound?BeCl2MgCl2CaCl2SrCl2BaCl2
- 5. Multiple ChoiceAmphoteric hydroxides react with...both alkalines and acidsalkalines onlyacids only
- 6. Multiple ChoiceAmphoteric, can dissolve (react) in...NaOH & HClNaOH onlyHCl only
- 7. Multiple ChoiceBeO is an ______ oxide of group 2 while other elements of group 2 forms ______ oxide.amphoteric, basicamphoteric, acidicacidic, amphotericbasic, amphoteric
- 8. Multiple ChoiceBeO =covalent character & amphotericionic character & basidicionic character & amphotericcovalent character & acidic
- 9. Multiple ChoiceWhich one forms amphoteric compound?BeOMgOCaOSrOBaO
- 10. Multiple ChoiceBeO, beryllium oxide, has _____ melting point than MgO because __________lower, the compound form has covalent molecule nature not ionic.lower, the compound form has ionic molecule nature not covalent.higher, the compound form has covalent molecule nature not ionic.higher, the compound form has ionic molecule nature not covalent.
- 11. Multiple ChoiceThe melting point and boiling points of group 2 (overall) are ______ when compared to the other elements of the group.higherloweralmost sameslightly different
- 12. Multiple ChoiceBeCl2 =dissolve in water, hydrolysis in water to produce ______ solution, ____ ions, acidic pH __ 7.acidic, H3O+, <basidic, OH-, >acidic, OH-, <basidic, H3O+, >
- 13. Multiple ChoiceWhich one has lowest pH (acidic) when dissolve in water? NaCl, KCl, BeCl2, MgCl2.BeCl2MgCl2NaClKCl
- 14. Multiple ChoiceWhat happens with NaCl when dissolve in water?neutral solutionacidicweak acid
- 15. Multiple ChoiceWhat happens with KCl when dissolve in water?neutral solutionacidicweak acid
- 16. Multiple ChoiceWhat happens with BeCl2 when dissolve in water?acidicweak acidneutral solution
- 17. Multiple ChoiceWhat happens with MgCl2 when dissolve in water?weak acidacidicneutral solution
- 18. Multiple ChoiceBeCl2 = can form dimer because ______________ .Be2+ has high charge densityit forms a covalent compoudsit forms an amphoteric compoundsit has lower melting pointit can form complex ions
- 19. Multiple ChoiceBeryllium act as a strong ________ agentreducingoxiding
- 20. Multiple ChoiceBe2+ + 2e− ⇌ Be(s), Standard reduction potential, E° (V) = _____–1.99-2.36-2.87-2.91
- 21. Multiple ChoiceBeryllium, Be can form complex ions because ________Be2+ has high charge densityit forms a covalent compoudsit forms an amphoteric compoundsit has lower melting pointit can form complex ions
- 22. Multiple ChoiceCan form dimer, Be2Cl4, because Be atom has a/ an ________ octet, the lone pair from the ______ atom utilised to form dative bond with _______.incomplete, Cl, Be.complete, Cl, Be.complete, Be, Cl.incomplete, Be, Cl.
- 23. Multiple ChoiceA complex ion is a cation bonded to small molecules called _______ by ________.ligands, dative bonds.dative bonds, ligands.
- 24. Multiple ChoiceA dative bond is....a covalent bond between two atoms where one of the atoms provides both electrons that form the bond.an ionic bond between two atoms where one of the atoms provides both electrons that form the bond.a covalent bond between two atoms where one of the atoms provides one electrons that form the bond.a ionic bond between two atoms where one of the atoms provides one electrons that form the bond.
- 25. Multiple ChoiceBeryllium, Be _____ in benzene (inorganic solvent), other element in group 2 ______. Example, BeCl2 ______ in benzene.soluble, insoluble, dissolveinsoluble, soluble, dissolvesoluble, insoluble, cannot dissolveinsoluble, soluble, cannot dissolve
- 26. Multiple ChoiceElectronegativity is basically a chemical property that describes how an atom can ________ with an electron in very well way. Values that electronegativity run from _______. As we all know electronegativity is used to assume the bonding between atoms and also see that they are ________, we can also predict that the result of molecules will be _______.attract, 0 to 4, ionic or covalent, polar or non-polarrepulsions, 0 to 4, polar or non-polar, ionic or covalentattract, 0 to 4, polar or non-polar, ionic or covalent
- 27. Multiple ChoiceBe, beryllium's valence electron is very ______ to nucleus. Be, beryllium more ________, ________, its electron _____ to be released during reactions.near, electronegative, less reactive, hardfar, electropositive, more reactive, easyfar, electronegative, less reactive, hardnear, electropositive, less reactive, hard
- 28. Multiple ChoiceReaction of elements group 2 with water:<br />Be = _______no reactionhot steamcold waternormal water
- 29. Multiple ChoiceReaction of elements group 2 with water:<br />Mg = ______hot steamno reactioncold waternormal water
- 30. Multiple ChoiceReaction of elements group 2 with water:<br />Ca = ______normal waterhot steamcold waterno reaction
- 31. Multiple ChoiceReaction of elements group 2 with water:<br />Sr = _______cold waterhot steamno reactionnormal water
- 32. Multiple ChoiceReaction of elements group 2 with water:<br />Ba = _______cold waterhot steamno reactionnormal water
- 33. Multiple ChoiceDown to group 2, from Beryllium to Barium, reactivity _______.increasesdecreasesalmost sameslightly different
- 34. Multiple ChoiceReactivity _________from Be to Ba, when down group 2. Because atomic radius and shielding effect increases.increasesdecreases
- 35. Multiple ChoiceReactivity increases from Be to Ba, when down group 2 because ....Valence electrons further from nucleus, the large shielding effect, weaker the nuclear pull towards the electrons, easier for metal to lose electrons.Valence electrons near from nucleus, the small shielding effect, stronger the nuclear pull towards the electrons, hard for metal to lose electrons.
- 36. Multiple ChoiceMelting point of:<br />BeCl2 = 399'C<br />BaCl2 = 962'C<br />Why?BeCl2, simple molecular structure molecules held by weak van der Waals forces.BeCl2, giant ionic structure, ions held by strong ionic bonds.BaCl2, simple molecular structure molecules held by weak van der Waals forces.
- 37. Multiple ChoiceBeryllium shows diagonal relationship with __________. Chemical properties of Be is similar to ______ which can form complex ions and ______ compound.aluminium, Al3+, amphotericaluminium, Al3+, basidicmagnesium, Mg2+, acidic
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