Đề Thi Hóa 8 Hk2 Có Đáp Án, 20 Bộ Đề Thi Hóa 8 Học Kì 2 Năm 2021

Chemistry 8th Semester 2 Exam Set ndi chikalata chothandiza kwambiri chomwe glaskragujevca.net ingafune kudziwitsa aphunzitsi ndi ophunzira a sitandade 8 kuti adziwe.

Mukuwona: Mayeso a Chemistry 8 hk2 okhala ndi mayankho

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Mafunso a mayeso a Chemistry 8 semester 2 Mulinso mafunso 13 okhala ndi mayankho atsatanetsatane. Potero pothandiza ophunzira kuti adziŵe bwino za dongosolo la mayeso, kubwereza kuti akwaniritse zotsatira zapamwamba mu mayeso a semester ya 2, kalasi ya 8. Pa nthawi yomweyo, ndizofotokozeranso aphunzitsi kuti ayese mayeso. Kupatula apo, mutha kuloza mafunso ena oyeserera monga: Mafunso a mayeso a semester yachiwiri a Literature 8, mafunso a semester 2 okhudza Mbiri 8.

Chemistry 8th Semester 2 Exam Set

Chemistry 8th Semester 2 - Funso 1

Gawo 1: Zosankha zingapo (5 mfundo)

Funso 1. Mapangidwe a mpweya (ndi voliyumu):

A. 21% O2, 78% N2, ndi 1% mpweya wamadzi.

B. 21% O2.78% N2 ndi 1% mpweya wina.

C. 21% O2, 78% N2, ndi 1% CO2.

D. 20% O2, 80% N2.

Ndime 2. Ndimagulu ati mwazinthu awa omwe ali ma asidi?

A. HCl, H3PO4, H2SO4, H2O.

B. HNO3, H2S, KNO3, CaCO3, HCl.

C. H2SO4, H3PO4, HCl, HNO3.

D. HCl, H2SO4, H2S, KNO3.

Ndime 3. Kutengera zinthu zotsatirazi: CO2, P2O5, CaCO3, SO3, Na2O, SiO2, CO, ZnO, PbO, N2O5, NO. Ndi zinthu ziti zomwe zili acidic oxide?

A. CO2, CaCO3, SO3, Na2O, SiO2.

B. CO2, ZnO, P2O5, SO3,SiO2,NO.

C. CO2, , SO3, , CO, N2O5, PbO .

D. CO2, SO3, SiO2, N2O5, P2O

Ndime 4. Ndi iti mwa ma khemical reaction yomwe siinachitike?

A. CuO + H2 →Cu + H2O

B. MgO + 2HCl → MgCl2+ H2

C. Ca(OH)2+ CO2 →CaCO3 + H2O

D. Zn + CuSO4 →Cu + ZnSO4

Funso 5. Kuwerengera kuchuluka kwa magalamu amadzi opangidwa pamene malita 4.48 a gasi wa haidrojeni atenthedwa mu oxygen?

ndi, 3.6g

B. 7.2g

C. 1.8 g

D. 14.4g

Ndime 6. Kukwera kumapangitsa kuti mpweya wa okosijeni ukhale wotsika chifukwa:

A. Mukakwera pamwamba, mpweya umachepa kwambiri.

B. Oxygen ndi mpweya wopanda mtundu komanso wopanda fungo.

C. mpweya ndi wolemera kuposa mpweya.

D. mpweya ndi wofunikira pa moyo.

Ndime 7. Kuwotcha 6.2g wa phosphorous mu chotengera chokhala ndi 10g wa okosijeni. Kodi nchiyani chimene chimatsala pambuyo pa zimene anachita, ndipo chifukwa chiyani?

A. Oxygen chifukwa 6.2g ya phosphorous imagwira mokwanira ndi 4g ya okosijeni.

B. Oxygen chifukwa 6.2g ya phosphorous imakhudzidwa mokwanira ndi 2g ya mpweya.

C. Zinthu ziwirizi zatha chifukwa 6.2g ya phosphorous imagwira mokwanira ndi 10g ya okosijeni.

D. Phosphorus chifukwa tikuwona kuti chiŵerengero cha molar pakati pa vuto ndi equation ya phosphorous ndi yaikulu kuposa ya oxygen.

Ndime 8. Pogwiritsa ntchito mankhwala kuti azindikire zinthu zotsatirazi: NaCl, asidi H2SO4, KOH, Ca(OH)2, bwanji?

A. Purple litmus, electrolysis.

B. Kugwada kofiirira

C. Purple litmus, mpweya wa CO2

D. Madzi, mpweya wa CO2

Ndime 9. Werengani kuchuluka kwa NaOH komwe kulipo mu 200g ya 15% yankho la NaOH.

Funso 10. Werengani kuchuluka kwa gasi wa 5M NaOH yankho momwe 60g ya NaOH imasungunuka.

A. 300 ml

C. 150 ml

B. 600 ml

D. 750 ml

Gawo 2: Nkhani (5 mfundo)

Funso 1. (2.5 points)

Kwa 5.4 magalamu a Al amachita ndi yankho la HCl, zomwe zimachitika kwathunthu. Dulani mpweya wonse womwe umapezeka kudzera mu CuO yotentha.

A. Lembani equation ya makemikolo pa zomwe zimachitika. Werengani kuchuluka kwa mchere analandira pambuyo anachita.

B. Kuwerengera kuchuluka kwa Cu komwe kunapezeka pambuyo pa zomwe anachita?

Ndime 2. (2.5 points)

Lolani 6.5 magalamu a Zn achite mokwanira ndi 100 ml ya hydrochloric acid solution.

A. Kuwerengera kuchuluka kwa mpweya wa haidrojeni wopezedwa pansi pamikhalidwe yokhazikika?

B. Kuwerengera kuchuluka kwa mchere wa mchere womwe umapezeka pambuyo pochita?

(Al = 27, Cu = 64, O = 16, H = 1, Cl = 35.5, Zn = 65, Na = 23, P = 31)

Chemistry 8 Semester 2 - Funso 2

Gawo I. Zosankha zingapo (5 mfundo)

Funso 1. Gwirizanitsani chimodzi mwa zilembo A kapena B, C, D mugawo loyamba ndi manambala 1 kapena 2, 3, 4, 5, mugawo II kuti mupeze zomwe zili zoyenera.

Chiganizo 2. Pazinthu zotsatirazi: C, CO, CO2, S, SO2, SO3, FeO, Fe2O3, Fe, NaOH, MgCO3, HNO3. Ma oxides angapo?

A. CO, CO2, SO2, FeO, NaOH, HNO

B. CO2, S, SO2, SO3, Fe2O3, MgCO3.

C. CO2, SO2, SO3, FeO, Fe2O3, CO.

D. CO2, SO3, FeO, Fe2O3, NaOH, MgCO

Chiganizo 3. Pamachitidwe awa amakhemikali:

CaCO3 →CaO + CO2 (1)

2KClO3 →KCl + 3O2 (2)

2KMnO4 →K2MnO4 + MnO2 + O2 (3)

Zn + CuSO4 Cu + ZnSO4 (4)

2H2O →H2 + 3O2 (5)

The decomposition reaction ndi:

Chiganizo 4. Pambuyo pochita ndi Zn ndi HCl mu labotale, kuyika choyikapo nyali mu chitoliro cha gasi, mpweya womwe umatuluka umayaka mumlengalenga ndi lawi la mtundu wanji?

Chiganizo 5. Werengani kuchuluka kwa potaziyamu penmanganate (KMnO4) yofunikira pokonzekera malita 3.36 a mpweya wa okosijeni (dktc).

Chiganizo 6. Pali 3 oxides motere: MgO, Na2O, SO3. Kodi zinthu izi zitha kudziwika ndi ma reagents awa:

A. Gwiritsani ntchito madzi ndi pepala lofiira la litmus.

B. Gwiritsani ntchito madzi okha

C. Gwiritsani ntchito asidi okha

D. Gwiritsani ntchito mankhwala a lye

Chiganizo 7. Lolani 13 magalamu a zinki achite ndi 0.3 mole ya HCl. Ndi chiyani chomwe chatsala pambuyo pa zomwe zachitika ndipo ndi magalamu angati omwe atsala?

A. Zotsalira Zn; 6.5g pa.

B. Kuchuluka kwa HCl; 1,825 magalamu

C. Kuchuluka kwa HCl; 3.65g pa

D. Zn zotsalira; 3.25 gm

Ndime 8. Mpweya wa haidrojeni umakonzedwa kuchokera kuzinthu ziti zomwe zili mu labotale?

A. Madzi a electrolysis

B. Kuchokera ku gasi ndi mafuta

C. Lolani Zn ichite ndi ma asidi osungunuka (HCl, H2SO4, ...)

D. Pyrolysis ya KMnO4

Ndime 9. Mtengo wa P2O5

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A. Diphosphate trioxide

B. Diphosphate oxide

C. Diphosphate pentaoxide

D. Phosphorus trioxide

Ndime 10. Pa 20oC, 60g ya KNO3 imasungunuka mu 190g yamadzi kuti mupeze yankho lodzaza. Kuwerengera kusungunuka kwa KNO3 pa kutentha kumeneko?

A. 32.58 g

B. 31.55 g

C. 3.17 g

D. 31.58 g

Gawo II: Essay (5 mfundo)

Funso 1. (2,5 points)

AKALEEurope 2. (2.5 points)

Sungunulani kwathunthu 19.5g ya Zn imachita mokwanira ndi 150 H2SO4 mayankho a asidi. Atsogolereni mpweya wonse wa haidrojeni womwe wangotuluka kumene mu iron (III) oxide, pezani mg wa chitsulo.

a. Kodi ma equation a mankhwala amapezeka?

b. Kuwerengera kuchuluka kwa njira ya H2SO4 acid yomwe imagwiritsidwa ntchito?

c. Werengani m.

(Al = 27, Cu = 64, O = 16, H = 1, Cl = 35.5, Zn = 65, Na = 23, N = 14, S = 32)

Chemistry 8 Semester 2 - Funso 3

Gawo 1. Zosankha zingapo (3 mfundo)

Funso 1. Ndi iti mwa mawu otsatirawa onena za okosijeni Ayi zolondola?

Chiganizo 2. Ndi ma oxide ati awa omwe ali ndi desiccant?

Ndime 3. Ndi ma oxide amtundu uti omwe amakhala ndi ma oxide onse ochita ndi madzi ofunda?

Ndime 4. P ikhoza kukhala ndi valency ya III kapena V. Pawiri yokhala ndi formula P2O5 imatchedwa:

Funso 5. Pali zotengera 4 zosiyana: madzi osungunuka, yankho la H2SO4, yankho la NaOH, yankho la NaCl. Kodi chinthu chilichonse chingadziwike bwanji mu mbale?

Chiganizo 6. Ma Acid ndi zinthu zomwe zimasinthira litmus kukhala mtundu uti mwa mitundu iyi?

Chiganizo 7. Kodi kusungunuka kwa gasi m'madzi kumasintha bwanji ndi kutentha kwakukulu komanso kutsika kwamphamvu?

Chiganizo 8. Mu 225 g madzi, 25 g wa KCl amasungunuka. Kuchuluka kwa yankho ndi:

A. 10%

B. 11%

C. 12%

D. 13%

Ndime 9. Sungunulani 16g SO3 m'madzi kuti mupeze yankho la 300ml. Mlingo wa H2SO4 yankho womwe umapezeka ndi:

A. 0.67M

B. 0.68M

C. 0.69M

D, 0.7M

Ndime 10. Ndi iti mwa zotsatirazi yomwe ili m'malo:

A. 2KClO3 →2KCl + O2

B. P2O5 +3H2O →2H3PO4

C. FeO + 2HCl → FeCl2+H2O

D. CuO + H2 →Cu + H2O

Gawo 2. Nkhani (6 mfundo)

Funso 1. (2 mfundo) Malizitsani zojambula zotsatirazi:

Ca CaO Ca(OH)2 CaCO3 CO2

Ndime 2. (1.5 mfundo) Perekani zinthu zomwe zili ndi mankhwala awa: H2SO4, Fe2(SO4)3, HClO, Na2HPO4. Tchulani ndi kugawa zinthu izi.

Ndime 3. (2.5 points) Mtsinje wa mpweya wa H2 umatsogozedwa ndi chubu chokhala ndi magalamu 4.8 a ufa wa CuO wotenthedwa palawi la nyali ya mowa, mpaka kuchuluka konse kwa CuO wakuda kusanduka Cu wofiira, kenako kuyima.

a. Kuwerengera kuchuluka kwa magalamu a Cu opangidwa?

b. Muwerengere kuchuluka kwa gasi wa haidrojeni (dktc) wokwanira zomwe zili pamwambapa?

c. Kuti mukhale ndi kuchuluka kwa H2, ndi magalamu angati a Fe omwe amayenera kutengedwa kuti agwiritse ntchito ndi magalamu angati a HCl acid?

Mayeso a Chemistry 2nd kalasi 8 - Funso 4

Gawo 1. Zosankha zingapo (mfundo 4)

Funso 1. Pamachitidwe amankhwala awa, equation yamankhwala yamtundu wolowa m'malo ndi:

A. CaO + H2O → Ca(OH)2

B. Fe + H2SO4 → FeSO4 + H2

C. CaCO3→CaO + CO2

D. 5O2 + 4P →2P2O5

Ndime 2. Kusungunuka kwa mpweya m'madzi kudzawonjezeka ngati:

Ndime 3. Ndi ziti mwa zotsatirazi zomwe zimagwiritsidwa ntchito popanga oxygen mu labotale?

Ndime 4. Ndi zinthu ziti mwa izi zomwe zimasungunuka m'madzi?

Funso 5. Sungunulani 5 g mchere wa tebulo mu 45g madzi. Kuchulukirachulukira kwa yankho ndi:

Ndime 6. Mndandanda wa zinthu ndi mawonekedwe a mankhwala a oxides:

A. SO2, BaO, P2O5, ZnO, CuO

B . SO2, BaO, KClO3, P2O5, MgO

C . CaO, H2SO4, P2O5, MgO, CuO

D . SO2, CaO, KClO3, NaOH, SO3

Ndime 7. Mpweya wa haidrojeni ungathe kuchitapo kanthu ndi zinthu zotsatirazi?

A. CuO, FeO, O3

B. CuO, FeO, H2

C. CuO, Fe2O3, H2SO4

D. CuO, CO, HCl

Gawo 2. Nkhani (6 mfundo)

Chiganizo choyamba. (choyamba,5 mfundo) Malizitsani ma equation amankhwala awa:

A. K2O + H2O →

B. Na + H2O →

C. Cu + O2→

D. xHy+ O2→

Funso 2. (1 mfundo) Loserani zomwe zimachitika ndikufotokozera zomwe zimachitika muzochitika izi:

a. Pamene chowuzira pa chitofu cha nkhuni changozimitsidwa

b. Pamene fani ikuwombera pa kandulo yoyaka

Funso 3 (mfundo 2.5) Kuyaka kwathunthu kwa 6.9 magalamu a sodium kumafuna V malita a mpweya wa oxygen woyezedwa pa (dktc).

a. Lembani equation ya mankhwala pa zomwe zikuchitika

b) Kuwerengera kuchuluka kwa okosijeni wogwiritsidwa ntchito

c) Chogulitsa chonsecho chimasungunuka m'madzi kuti mupeze 180g ya yankho A. Werengani kuchuluka kwa yankho la A.

Ndime 4.

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(1point) Pa magalamu 24 osakaniza a CuO ndi Fe2O3 oxides, gwirani kwathunthu ndi haidrojeni wochulukirapo kuti mupeze 17.6 magalamu osakaniza azitsulo ziwiri. Pezani kuchuluka kwa madzi opangidwa.

Kutengera kuchuluka kwa ma atomiki azinthu: Ku=makumi asanu ndi limodzi mphambu anayiO=16, Cl=35.5, Fe=56, H = 1, Na = 23