INSTITUCION EDUCATIVA MANUEL ELKIN PATARROYO UNIDAD No 1: MATERIA Y ENERGÍA 1. Las partículas representadas en el esquema conforman A. un compuesto B. un átomo C. un elemento D. una mezcla
2. Es un proceso químico: A. La ebullición del agua B. La destilación del alcohol C. La dilatación de los metales D. El rompimiento de un vidrio E. La fermentación de la leche CONTESTE LAS PREGUNTAS 3 A 5 DE ACUERDO CON LA SIGUIENTE GRÁFICA
3. Al dejar caer la esfera en la probeta, lo más probable es que A. flote sobre la superficie de Q por ser esférica B. quede en el fondo, por ser un sólido C. flote sobre P por tener menos volumen D. quede suspendida sobre R por su densidad 4. Si se pasa el contenido de la probeta a otra, es probable que A. Q, P y R formen una solución B. Q quede en el fondo, luego P y en la superficie R C. P y Q se solubilicen y R quede en el fondo D. P, Q y R permanezcan iguales
5. Para obtener por separado Q, P y R el montaje experimental más adecuado es
6. Dos bloques T y U de distintas sustancias tienen un volumen de 50 cm3 cada uno. El bloque T tiene una masa de 100g, el bloque U tiene una masa 25g. Se tiene un recipiente con un líquido cuya densidad es 1g/cm3, las sustancias T y U son insolubles en el líquido y no reaccionan con éste. Al introducir los bloques T y U en el líquido, es muy probable que A T flote flote y U se se hunda hunda B T se hunda y U flote C T y U floten D T y U se hundan 7. Si Marina está realizando un experimento experimento para el cual necesita un objeto que actué como abrasivo (producto que sirve para desgastar o pulir por fricción) y tenga escasa conductividad tanto eléctrica como térmica, entre los siguientes el material que brindara estas propiedades es: A. Alambre de cobre B. Ladrillo C. Papel aluminio D. Barra de acero 8. La resistencia de una parte de un fluido a desplazarse sobre otra parte del mismo fluido se denomina viscosidad. En la mayoría de los líquidos, la viscosidad es inversa a la temperatura. Se tienen volúmenes iguales de cuatro líquidos, cada uno en una bureta. Cuando se abren simultáneamente las llaves de las buretas, los líquidos comienzan a gotear como se indica en el dibujo.
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D cloroformo
12. Dos sustancias R y S tienen el mismo volumen, la masa de R es el doble de la masa masa de S. De la densidad de R con respecto a S, se puede afirmar que es La lista de los líquidos ordenados de mayor a menor viscosidad es A B C D
Q, S, P, R S, Q, Q, R, P R, P, S, Q P, Q, R, S
9. En la escala Kelvin el punto de ebullición del agua es de: b. 100° C c. 0° d. 273° C a. 373° C
A B C D
la mitad la cuarta parte el doble Igual
13. En la tabla se muestran los valores de densidad densidad de cuatro líquidos inmiscibles a 20 oC y 1 atm de presión e. -273° C
10. El método empleado para separar una mezcla líquida-líquida con base en las diferencias de densidades de sus componentes es la: a. Evaporación b. Filtración c. Decantación d. Lixiviación Lixiviac ión e. Destilación
El líquido de mayor densidad es
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UNIDAD No 5: NOMENCLATURA QUÍMICA 5. De acuerdo con las siguientes reacciones T + O2 V V + H2O Y Y + HX Z + H2O Si X es un no metal del Grupo VIIA y Z es una sal, V es: A. un óxido básico B. un óxido ácido C. un hidróxido D. una sal
38. Considere las correspondencias entre las fórmulas y su clasificación general I. Na2O2 Peróxido II. PbS Sulfato III. SO3 Anhídrido IV. H2SO4 Ácido Es (son) correcta (s): A) Sólo I B) I y III C) II y IV D) II, III y IV E) I, III y IV
metal
a. Oxígeno con metal
b. Hidrógeno con no metal
d. Hidrógeno con metal
e. Metal con no metal
c. Oxígeno con no
107. Origina un ácido al reaccionar con el agua: b. Óxido de sodio c. Dióxido de azufre a. Azufre d. Fósforo e. Óxido férrico 108. Al combinar una sustancia ácida con una sustancia básica se forma: a. Óxido básico más agua b. Óxido ácido más agua más agua e. Sal más agua d. Base más agua 109. Resultado de combinar un óxido básico más agua: Ácido b. Sal c. Peróxido d. Base a.
c. Peróxido
e. Hidruro
110. Cuál de las siguientes afirmaciones es incorrecta: a. Metal con oxígeno produce óxido b. Metal con no metal produce sal c. Metal con hidrógeno produce hidruro d. Metal con metal produce aleación e. Metal con agua produce base 5. De acuerdo con las siguientes reacciones T + O2 V V + H2O Y Y + HX Z + H2O
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TENIENDO EN CUANTA LA TABLA Compuesto
Fórmula
Agua 2O Azúcar 12H22O11 Dióxido de CO2 Carbono
Peso molecular 18H g C342,3 g 44 g
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