Reaccions químiques 3r
Quiz
•
Chemistry
•
3rd Grade
•
Practice Problem
•
Hard
Luis Sabater
Used 3+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Indica el coeficient estequiomètric del clorur de cinc
Zn +HCl → ZnCl2 + H2
2
3
1
cap és correcta
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Les reaccions de síntesi són:
Sempre exotèrmiques
Sempre endotèrmiques
Aquelles en les que es forma un sol producte
Aquelles en les que partim d'un únic reactiu
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
La següent equació química a quin tipus de reacció pertany?
Al(s) + O2(g) → Al2O3
Descomposició
Combinació
Oxidació i reducció
Síntesi
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
El ferro s'oxida produint monòxid de ferro. Indica quina de les següents reaccions és la correcta:
Fe + O → FeO2
Fe2 + O2 → Fe2O
2 Fe + O2 → 2 FeO
2 Fe + O → FeO
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Quin és el coeficient estequiomètric de l'alumini?
Al + H2SO4 → Al2(SO4)3 + H2
2
1
3
ninguna es correcta
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Quin és el coeficient estequiomètric de l'àcid clorhídric?
HCl + Ca → CaCl2 + H2
2
1
3
ninguna es correcta
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
La següent equació química a quin tipus de reacció pertany?
CaCO3 → CaO + CO2
Reacciones de sustitución
Reacción de sustitución doble
Reacción de síntesis
Reacción de descomposición
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