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Chemical Exam

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preparatoria
1er Examen Parcial

Nombre: _________________________________________________ Grupo: _____________________

Fecha: Materia: QUIMICA II
Nombre del Profesor: Ernesto Román López Nájera / Dirección de Preparatoria

INSTRUCCIONES GENERALES: Lea cuidadosamente para responder cada una de las preguntas o problemas. Cualquier resultado será inválido en caso de no contener los procedimientos que sean necesarios y/o correctos para la obtención de alguna solución, así como por incluir más de una respuesta

I. SELECCIONE LA OPCIÓN CORRECTA (VALOR 5.5 PTS C/U)

1. Es cuando en una(s) sustancia(s) se efectúa un cambio químico y se producen una o más sustancias diferentes.

a) Reacción química b) Ecuación química c) Cambio físico

2. Es la descripción simbólica para las reacciones químicas, mediante el cual unas sustancias (reactivos) se transforman en otras (productos de la reacción).

a) Cambio Físico b) Balanceo químico c) Ecuación química

3. Tipo de reacción química donde se da la unión química de dos o más elementos o compuestos para formar un compuesto más complejo

a) Reacción de Síntesis b) Reacción de Descomposición c) Reacción de desplazamiento simple

4. Tipo de reacción química cuando un elemento que es más activo que el otro elemento que forma el compuesto, lo remplaza o sustituye en la reacción

a) Reacción de Síntesis b) Reacción de Descomposición c) Reacción de desplazamiento simple

5. Tipo de reacción química en la que se presenta un intercambio de átomos entre las sustancias que reaccionan. Los nuevos compuestos se formarán combinándose un ion positivo de un compuesto con un ion negativo de otro compuesto

a) Reacción de Síntesis b) Reacción de Descomposición c) Reacción de desplazamiento doble

6. Tipo de reacción química en la que un compuesto se descompone en sus elementos o en otro compuesto más sencillo

a) Reacción de Síntesis b) Reacción de Descomposición c) Reacción de desplazamiento doble

7. Clasificación de la reacción química donde a partir de los reactantes en disolución, se forma y precipita un compuesto sólido insoluble.

a) Reacción Redox b) Reacción de neutralización c) Reacción de precipitación

8. Clasificación de la reacción química donde los reactivos, un ácido y una base, se neutralizan obteniéndose como productos una sal y agua.

a) Reacción Redox b) Reacción de neutralización c) Reacción de precipitación

9. Clasificación de la reacción química donde hay movimiento de electrones desde un átomo o una sustancia que cede electrones (reductor) a un átomo o una sustancia que capta electrones (oxidante).

a) Reacción Redox b) Reacción de neutralización c) Reacción de precipitación

10. Clasificación de la reacción química donde los reactivos, un combustible y Oxigeno formando una llama con calor y productos llamados gases de combustión más agua.

a) Reacción Redox b) Reacción de combustión c) Reacción de precipitación

Nombre: _________________________________________________ Grupo: _____________________

Fecha: Materia: QUIMICA II

II. Indique el tipo o clasificación de reacción química donde se indique (valor = 5 puntos) y realice el balanceo indicado de las siguientes ecuaciones químicas. (valor:10 puntos)

a) KClO3-------> KCl + O2 (Balanceo Tanteo) Tipo:

b) Fe + HCl ----> FeCl3 + H2 (Balanceo Tanteo) Tipo:

c) C3H8 + O2 ----> CO2 + H2O (Balanceo Tanteo) Clasificación:

d) Na + H2O--------> NaOH + H2 (Balanceo Redox) Tipo:

e) Cu + HNO3 -> Cu(NO3 )2+ NO+ H2O (Balanceo Redox)

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