TESTBANK n
EXAMS
ALL HESI A2 CHEMESTY EXAMS 2026-
n n n n n
2027 | REAL EXAMS |GUARANTEED PAS
n n n n n
S |COMPLETE|APPROVED EXAMS 100
n n n
%
Table of Contents
n n
HESInA2nCHEMISTRYnQuestionsnwithnanswersnversionn1..................................................................................... 1
HESInA2n Chemistrynquestionsnwithnanswersnversionn2........................................................................................ 10
HESInA2nChemistrynQuestionsnwithnAnswersnversion3 ....................................................................................... 19
HESInA2nChemistrynnotencardsnfornHESInentrancenexam .................................................................................... 33
HESInA2nCHEMISTRYnQuestionsnandnanswersnversionn4 .................................................................................. 39
HESInA2nCHEMISTRYnQuestionsnwithnanswersnversionn1
1. nIfnanHydrogennisninnancompound,nwhatnwouldnitsnoxidationnnumbernbe?
+1
2. Whatnisnthenoxidationnnumbernofnanynsimplenion?
+1norn-1ndependingnonnthenchargenofnthenion
3. Hownmanynkilogramsnareninnanpound?n
0.453592nkg
,4. WhatnisnthentemperaturenfornfreezingnpointnofnwaterninnCelsius?n
0ndegreesnCelsiusn(32°FnfornFahrenheit)
5. WhatnisnthenconversionnofnCelsiusntonFahrenheit?n
0°Cn=n32°F
6. Whatnisnthenoxidationnnumbernofnannelementnatom?n
0
7. WhatnisnthenfreezingnpointnofnseanwaterninnFahrenheit?n
0°F
8. Hownmanynaminonacidsnareninnandipeptide?n
2
9. IfnOxygennisninnancompound,nwhatnwouldnitsnoxidationnnumbernbe?
-2
10. WhichnofnthenfollowingnpHnvaluesnwouldnlemonnjuicenlikelynhave?n
2nbecausenthenlowernthenpHnvalue,nthenmorenacidic
11. Whatnisnanpentose?
An5ncarbonnsugarn(Pentn=n5)n(osen=nsugar)
12. WhatnisnthenoxidationnstatenofnthenSulfurnatomninnSulfuricnAcidnH SO ?n
2 4
6
13. Hownmanynneutronsndoesncarbonn14nhave?
n8n(nmass#n-natomicsn#n=nneutrons)n 14n-n6n=n8
14. HownmanynprotonsndoesnPotassiumnhave?
n19
15. Hownmanynaminonacidsnarenessentialnfornhumannlife?n
20naminonacids
16. Normalnbodyntemperatureninn°C?
n37°C
17. Normalnbodyntemperatureninn°F?
n98.6°F
18. Boilingnpointnofnwaterninn°C?
n100°C
19. Boilingnpointnofnwaterninn°F?
n212°F
20. 0°Knisnequalnto °C?n -273°C
21. ThentermnAmphotericnmeans?
Ansubstancenthatncannactnasnbothnanbasen&nacid
22. WhatnisnKelvinnbasednaround?
, Absolutenzero
23. AncompoundnthatnisnanHydrogennornprotonndonor,ncorrosiventonmetals,ncausesnbluenlitmusn
paperntonbecomenrednandnbecomesnlessnacidicnwhennmixednwithnanbasenis?
Acid
24. Mixturenofn2nornmorenmetalsnare?
nAlloys
25. Acids:
pHnlessnthann7.0
sour/tart
FormulasnbeginnwithnHn(Hydrogen)nProt
onnDonor
26. 3ntypesnofnradiationninnnuclearnchemistry?nA
lpha,nBetan&nGamma
27. Alphanradiation:
* EmissionnofnHeliumn(He)nionsninnthennuclei
* Containsn2nprotonsn&n2nneutrons.
*n+2nCharge
* Largestnradiationnparticle.
* Cannbenstoppednbynpiecenofnpaper
00.nTypenofnAlloyninnwhichnanothernmetalnisndissolvedninnMercuryn(Hg)?
Amalgam
28. Proteinsn arenmadenupnof?
nAminonAcids
29. Glycogennisnwhatnkindnofnstarch?
nAnimalnStarch
30. Whennanelectronngainsnonenornmorenelectrons?n
Anions
31. Basicnbuildingnblocknofnanmolecule?
nAtomn(NOTnCELL!!)
32. Atomicnmass?
Averagenmassnofnanelementsnisotope
33. Atomicn#:
#nofnprotonsninnnucleusnofnannatom
34. Base?
AnHydrogennornprotonnACCEPTORn&nhasnhydroxidengroupninnthenmakeupnofnthen
molecule
, Producen-OH
Bitter,nslippery,nconductnelectricity,nformulasncontainn-OH
pHnvaluengreaternthann7.0
Protonnacceptor
35. Keynnote:
AcidsnarenProtonndonorsnasnBasesnarenprotonnacceptors
36. Betanradiation:
Decompositionnproductnofnanprotonnornneutron
Highnspeed/energynElectrons
EITHERn-nchargednelectronsnorn+nchargednpositrons
Cannbenstoppednbynaluminumnfoil
37. WhatnisnBiochemistry?
Studynofnsubstancesn&nprocessesnoccurringninnlivingnthings
38. Fahrenheitnisnbasednoffnof?
nBodyntemperature
39. Howndoesn↑nSurfacenareanspeednupnchemicalnreactions?nB
yn↑nareasnofncontactnwherenchemicalnreactionsncannoccur
40. Howndoncatalystnacceleratenanchemicalnreaction?
Bynreducingnthenamountnofnenergynneedednfornanreactionntonoccur
41. WhatndoesnCOOHnsymbolize?
nAnCarboxylngroup
42. Whichnofnthenfollowingnisnnotnansolutionntype?n
Catalyst
43. DefinenCatalyst.
Substancenthatnspeedsnupnanchemicalnreaction.
44. WhatnisnannatomncallednwhennitnLOSESn1nornmorenelectrons?n
Cations
45. Whatnisnchemicalnbonding?
Thenjoiningnofnatomsntonformnnewnsubstances.n2ntypes:nionicn&ncovalentnbonding
46. WhatnisnanIonicnbond?
Electricalnattractionnbetweenn2noppositelynchargednatomsngroupsnofnatomsncalledn
ions
(betweennmetalsn&nnonmetals)
47. Ionicnbonding?
Chemicalnbondnthat’snformednwhennannatomntransfersnanelectronntonanothernatom.n(steals
)
48. SinglenCovalentnbond?
Chemicalnbondnthatnsharesn1nelectronnpair
Formednbynnon-metals
49. Whatnarenchemicalnreactions?
Makingn&nbreakingnofnchemicalnbonds,nleadingntonchangesninncompositionnofnmatter
50. DoublenCovalentnbond?
EXAMS
ALL HESI A2 CHEMESTY EXAMS 2026-
n n n n n
2027 | REAL EXAMS |GUARANTEED PAS
n n n n n
S |COMPLETE|APPROVED EXAMS 100
n n n
%
Table of Contents
n n
HESInA2nCHEMISTRYnQuestionsnwithnanswersnversionn1..................................................................................... 1
HESInA2n Chemistrynquestionsnwithnanswersnversionn2........................................................................................ 10
HESInA2nChemistrynQuestionsnwithnAnswersnversion3 ....................................................................................... 19
HESInA2nChemistrynnotencardsnfornHESInentrancenexam .................................................................................... 33
HESInA2nCHEMISTRYnQuestionsnandnanswersnversionn4 .................................................................................. 39
HESInA2nCHEMISTRYnQuestionsnwithnanswersnversionn1
1. nIfnanHydrogennisninnancompound,nwhatnwouldnitsnoxidationnnumbernbe?
+1
2. Whatnisnthenoxidationnnumbernofnanynsimplenion?
+1norn-1ndependingnonnthenchargenofnthenion
3. Hownmanynkilogramsnareninnanpound?n
0.453592nkg
,4. WhatnisnthentemperaturenfornfreezingnpointnofnwaterninnCelsius?n
0ndegreesnCelsiusn(32°FnfornFahrenheit)
5. WhatnisnthenconversionnofnCelsiusntonFahrenheit?n
0°Cn=n32°F
6. Whatnisnthenoxidationnnumbernofnannelementnatom?n
0
7. WhatnisnthenfreezingnpointnofnseanwaterninnFahrenheit?n
0°F
8. Hownmanynaminonacidsnareninnandipeptide?n
2
9. IfnOxygennisninnancompound,nwhatnwouldnitsnoxidationnnumbernbe?
-2
10. WhichnofnthenfollowingnpHnvaluesnwouldnlemonnjuicenlikelynhave?n
2nbecausenthenlowernthenpHnvalue,nthenmorenacidic
11. Whatnisnanpentose?
An5ncarbonnsugarn(Pentn=n5)n(osen=nsugar)
12. WhatnisnthenoxidationnstatenofnthenSulfurnatomninnSulfuricnAcidnH SO ?n
2 4
6
13. Hownmanynneutronsndoesncarbonn14nhave?
n8n(nmass#n-natomicsn#n=nneutrons)n 14n-n6n=n8
14. HownmanynprotonsndoesnPotassiumnhave?
n19
15. Hownmanynaminonacidsnarenessentialnfornhumannlife?n
20naminonacids
16. Normalnbodyntemperatureninn°C?
n37°C
17. Normalnbodyntemperatureninn°F?
n98.6°F
18. Boilingnpointnofnwaterninn°C?
n100°C
19. Boilingnpointnofnwaterninn°F?
n212°F
20. 0°Knisnequalnto °C?n -273°C
21. ThentermnAmphotericnmeans?
Ansubstancenthatncannactnasnbothnanbasen&nacid
22. WhatnisnKelvinnbasednaround?
, Absolutenzero
23. AncompoundnthatnisnanHydrogennornprotonndonor,ncorrosiventonmetals,ncausesnbluenlitmusn
paperntonbecomenrednandnbecomesnlessnacidicnwhennmixednwithnanbasenis?
Acid
24. Mixturenofn2nornmorenmetalsnare?
nAlloys
25. Acids:
pHnlessnthann7.0
sour/tart
FormulasnbeginnwithnHn(Hydrogen)nProt
onnDonor
26. 3ntypesnofnradiationninnnuclearnchemistry?nA
lpha,nBetan&nGamma
27. Alphanradiation:
* EmissionnofnHeliumn(He)nionsninnthennuclei
* Containsn2nprotonsn&n2nneutrons.
*n+2nCharge
* Largestnradiationnparticle.
* Cannbenstoppednbynpiecenofnpaper
00.nTypenofnAlloyninnwhichnanothernmetalnisndissolvedninnMercuryn(Hg)?
Amalgam
28. Proteinsn arenmadenupnof?
nAminonAcids
29. Glycogennisnwhatnkindnofnstarch?
nAnimalnStarch
30. Whennanelectronngainsnonenornmorenelectrons?n
Anions
31. Basicnbuildingnblocknofnanmolecule?
nAtomn(NOTnCELL!!)
32. Atomicnmass?
Averagenmassnofnanelementsnisotope
33. Atomicn#:
#nofnprotonsninnnucleusnofnannatom
34. Base?
AnHydrogennornprotonnACCEPTORn&nhasnhydroxidengroupninnthenmakeupnofnthen
molecule
, Producen-OH
Bitter,nslippery,nconductnelectricity,nformulasncontainn-OH
pHnvaluengreaternthann7.0
Protonnacceptor
35. Keynnote:
AcidsnarenProtonndonorsnasnBasesnarenprotonnacceptors
36. Betanradiation:
Decompositionnproductnofnanprotonnornneutron
Highnspeed/energynElectrons
EITHERn-nchargednelectronsnorn+nchargednpositrons
Cannbenstoppednbynaluminumnfoil
37. WhatnisnBiochemistry?
Studynofnsubstancesn&nprocessesnoccurringninnlivingnthings
38. Fahrenheitnisnbasednoffnof?
nBodyntemperature
39. Howndoesn↑nSurfacenareanspeednupnchemicalnreactions?nB
yn↑nareasnofncontactnwherenchemicalnreactionsncannoccur
40. Howndoncatalystnacceleratenanchemicalnreaction?
Bynreducingnthenamountnofnenergynneedednfornanreactionntonoccur
41. WhatndoesnCOOHnsymbolize?
nAnCarboxylngroup
42. Whichnofnthenfollowingnisnnotnansolutionntype?n
Catalyst
43. DefinenCatalyst.
Substancenthatnspeedsnupnanchemicalnreaction.
44. WhatnisnannatomncallednwhennitnLOSESn1nornmorenelectrons?n
Cations
45. Whatnisnchemicalnbonding?
Thenjoiningnofnatomsntonformnnewnsubstances.n2ntypes:nionicn&ncovalentnbonding
46. WhatnisnanIonicnbond?
Electricalnattractionnbetweenn2noppositelynchargednatomsngroupsnofnatomsncalledn
ions
(betweennmetalsn&nnonmetals)
47. Ionicnbonding?
Chemicalnbondnthat’snformednwhennannatomntransfersnanelectronntonanothernatom.n(steals
)
48. SinglenCovalentnbond?
Chemicalnbondnthatnsharesn1nelectronnpair
Formednbynnon-metals
49. Whatnarenchemicalnreactions?
Makingn&nbreakingnofnchemicalnbonds,nleadingntonchangesninncompositionnofnmatter
50. DoublenCovalentnbond?
