3er Examen QCA
Authored by Prof Galvan
Chemistry
9th Grade
Used 2+ times
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25 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
En las reacciones ácido-base ______________ especie cambia su estado de oxidación.
ninguna
todas
algunas
no siempre las
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
En las reacciones del tipo óxido-reducción, ___________________ especies cambian de estado de oxidación
al menos dos
al menos una
todas
ninguna
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Cuando una especie _________________________ su número de oxidación aumenta
pierde electrones
pierde neutrones
gana electrones
pierde protones
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Cuando una especie _________________________ su número de oxidación disminuye
gana electrones
gana protones
ganas cargas
pierde electrones
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
A la especie que se ___________ se le denomina el agente ________________
reduce // oxidante
oxida // oxidante
pierde electrones // covalente
Reduce // iónico
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
El yodo cambia de estado de oxidación de +5 a 0,
gana 5 electrones
pierde 5 electrones
trae 5 electrones
participa con 5 electrones
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
En la reacción
K2Cr2O7 + As2O3 → CrCl3 + AsO4 3-
As2O3 → AsO4 3- es
oxidación
reducción
reacción exotérmica
un compuesto
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