
kimi
Authored by Onida Gashi
Chemistry
9th - 12th Grade

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7 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 3 pts
Cilët janë xehrorët më të përhapur të plumbit në natyrë?
kalciti, galena, anglesiti.
Hematite, kuprazi, kerusiti.
hematiti, boksiti, galena.
Galena, anglesiti, kerusiti.
Answer explanation
Galena - xehërori më i përhapur i plumbit.
2.
FILL IN THE BLANK QUESTION
1 min • 7 pts
squfuri nga galena per perfitim te plumbit largohet me
Answer explanation
2PbS + 3O2 -----> 2PbO + 3SO2
PbO + C -----> Pb + CO
3.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Oksidet e plumbit
Oksidi i plumbit (II) ____
Oksidi i plumbit (IV) ___
Oksidi i kuq i plumbit (II, IV) ____
4.
MULTIPLE CHOICE QUESTION
30 sec • 3 pts
pse plumbi nuk eshte shum aktiv me acidin klorhidrik dhe sulforik?
sepse formon nje cip te holle siperfaqesore e cila parandalon veprimin e metejshem
sepse reagon shume shpejte dhe zhduket menjehere
sepse plumbi eshte nje metal shume aktiv dhe tretet lehte
Answer explanation
Pb + 2H2SO4 -----> PbSO4 + SO2 + 2H2O
5.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Shumica e mineraleve te plumbit permbajne nje perqindje te ulet te tij, andaj ato duhet te _________ permes procesit te _________
6.
MULTIPLE SELECT QUESTION
30 sec • 5 pts
Per cka eshte perdorur kompleksi i njohur plumbi i bardhe?
lyrjen e banesave
pigment dekorativ
prodhimin e municioneve
mjet mbrojtes nga rrezatimi
Answer explanation
Kompleksi i njohur si plumbi i bardhe( hidroksikarboni i plumbit Pb3(OH)2(CO3)2) u pergadit si nje mjet dekorativ, te pakten ne fillim te vitit 200 p.e.s. Ai u perdor per lyerjen e banesave, dhe shume njerez vuajten helmimin prej tij.
7.
MULTIPLE SELECT QUESTION
45 sec • 4 pts
Plumbi qe perfitohet nga furra me djegie, pergjithesisht permban…
baker
karbon
stibium
zink
Answer explanation
Permban baker, stibium, arsenik, ar dhe argjend. Nese plumbi i perfituari nenshtrohet shkrirjes duke u perzier, stibiumi, arseniku dhe bismuti oksidohen, dalin ne siperfaqe dhe largohen ndersa plumbi i paster perftohet nga rafinimi
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