Quiz Final Química Primero Medio
Quiz
•
Chemistry
•
9th Grade
•
Practice Problem
•
Hard
Gonzalo Rojas
Used 61+ times
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20 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Verdadero o Falso
"Cuando queremos tomarnos un té, calentamos agua en la tetera hasta que sale un vapor que emite un sonido característico. Esto es un cambio químico del agua"
V
F
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Verdadero o Falso
"Quemar una hoja de papel es un ejemplo de cambio físico de la materia"
V
F
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Los fenómenos que nos permiten reconocer reacciones químicas son:
I) Emisión de luz
II) Liberación de energía térmica
III) Liberación de gases
IV) Cambio de Color
V) Formación de sólidos
I, II y III
IV y V
I, II, III, IV y V
II, III, IV y V
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
¿Cuáles son los reactivos de la reacción representada en la imagen?
I) Na
II) H2O
III) NaOH
IV) H2
Sólo I
I y II
III y IV
Sólo II
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Una reacción química se representa mediante:
Ecuación matemática
Modelos geométricos
Ecuación química
Balance de masas
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Las reacciones de síntesis son:
Siempre exotérmicas
Siempre endotérmicas
Aquellas en las que se forma un solo producto
Aquellas en las que se parte de un único reactivo
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Para que se produzca una reacción química
Se deben romper los enlaces de los reactivos
Deben existir choques efectivos entre los átomos
Se debe superar la energía de activación
Todas las anteriores
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