
AZOTO RŪGŠTYS
Authored by Elvyra Ajauskaite
Chemistry
2nd Grade
Used 14+ times

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17 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kuri rūgštis silpnesne už azoto rūgštį? A A
Druskos rūgštis
Sieros rūgštis.
Anglies rūgštis.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kuris junginys raide A pažymėti šioje kitimų schemoje NH3 ⎯⎯→ A ⎯⎯→ HNO3
N2
N20
NO2
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Koks reakcijos produktas gaunamas vykstant reakcijai: 4NO2 + O2 + 2H2O →
4HN02
4NH3
4HN03
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kuri lygtis teisingai aprašo vario reakciją su praskiesta azoto rūgštimi?
Cu + 2HNO3 → Cu(NO3)2 + H2
3Cu + 8HNO3 → 3Cu(NO3)2 + 2NO + 4H2O
5Cu + 12HNO3 → 5Cu(NO3)2 + N2 + 6H2O
4Cu + 10HNO3 → 4Cu(NO3)2 + NH4NO3 + 3H2O
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Dūminis, arba juodasis, parakas buvo išrastas Kinijoje IX amžiuje. Iki XVIII amžiaus tai buvo vienintelė žinoma sprogstamoji medžiaga. Dūminis parakas buvo plačiai naudojamas karyboje, taip pat gaminant fejerverkus. Supaprastintą parako degimo reakcijos lygtį galima užrašyti taip:
S(k) + 4KNO3(k) + 7C(k) → K2S(k) + K2CO3(k) + 2N2(d) + 3CO(d) + 3CO2(d) ΔH = −1688,2 kJ
Kaip vadinasi KNO3
Kalio nitidas
Kalio nitratas
Kalio nititas
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Parašykite cheminių ryšio junginyje KNO3, tarp kalio ir azoto pavadinimą.
kovalentinis nepolinis
kovalentinis polinis
joninis
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kaip atrodo yra azoto rūgštis?
bespalvis skystis, turintis aštrų kvapą
mėlynas ir bekvapis skystis
mėlynas skystis su aštraus kvapo
bespalvis ir bekvapis skystis
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