
QUIMICA
Quiz
•
Chemistry
•
2nd Grade
•
Practice Problem
•
Hard
grupo T
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5 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
. Respecto a las reacciones químicas, indique lo incorrecto.
A) Es sinónimo de fenómeno químico.
B) En ellas ocurren cambios energéticos.
C) Existe ruptura de enlaces químicos y formación de otros nuevos.
D) El cambio de fase de una sustancia es evidencia de que ha ocurrido reacción química.
A
B
C
D
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
2Relacione adecuadamente la reacción con su tipo correspondiente.
I. KClO3 → KCl +O2 a. Metátesis
II. Na2CO3 +CO2 + H2O → NaHCO3 b. Desplazamiento simple
III. Na + H2O → NaOH + H2 c. Adición
IV. HCl + Mg(OH)2 → MgCl2 + H2O d. Descomposición
Ia, IIb, IIIc, IVd
Ib, IIa, IIIc, IVd
Ic, IIb, IIIa, IVd
Id, IIc, IIIb, IVa
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
. Indique una reacción de combustión completa:
A) H2 + O2 → H2O
B) C3H8 + O2 → CO + H2O
C) CH4 + O2 → CO2 + H2O
D) C2H6 + O2 CO + H2O
A
B
C
D
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
. Al balancear la ecuación por tanteo: N2 + H2→ NH3 Determine La suma de coeficientes
5
6
7
8
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Determine el coeficiente del agente reductor en la ecuación: Al + HCl → AlCl3 + H2
1
2
3
4
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