Hisham Mahmoud
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Chapter 4 Grade 10 SABIS chemistry Quiz Level L

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Hisham Mahmoud
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Chapter 4 Grade 10 SABIS chemistry Quiz Level L Part 1

Pregunta 1 de 11

9

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Which of the following is a physical change? Which is a chemical change?
1. Heating wax until it melts ( Physical, Chemical, Physical and Chemical )
2. Crush some salt crystals into a powder ( Physical, Chemical, Physical and Chemical )
3. Boiling water until it evaporates, then condensing the
steam. ( Physical, Chemical, Physical and chemical )
4. Boiling an egg in boiling water for two minutes, then
cooling the water. ( Physical, Chemical, physical and chemical )
5. Heating a piece of paper until it turns black, then cooling
it. ( Physical, chemical, physical and chemical )
6. Heating a mixture of hydrogen and oxygen until it
“pops”, and then cooling the gases to a liquid. ( Physical, Chemical, physical and chemical )
7. Dissolving salt into water to make a solution ( Physical, Chemical, physical and chemical )
8. Cooking a steak until it is well done ( Physical, Chemical, physical and chemical )
9. Burning magnesium ribbon in air ( Physical, chemical, physical and chemical )

Explicación

Pregunta 2 de 11

2

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Which of the following is a physical change? Which is a chemical change?

burning a piece of wood ( Chemical change, Physical change )
dissolving copper sulfate in water to obtain a blue solution ( Physical change, Chemical change )

Explicación

Pregunta 3 de 11

11

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State if the following processes is endothermic or exothermic?
1. Heating water from 20°C to 80°C. ( Endothermic, Exothermic )
2. Heating water from 20°C through to boiling continuously at 100°C. ( Endothermic, Exothermic )
3. The burning of a magnesium ribbon in air ( Endothermic, Exothermic )
4. The reaction that takes place when a spark is introduced to a mixture of H2 and O2 gas. ( Endothermic, Exothermic )
5. Any reaction or process that consumes heat energy. ( Endothermic, Exothermic )
6. The process of cooling liquid paradichlorobenzene until it solidifies. ( Endothermic, Exothermic )
7. The decomposition of water into H2 and O2 gas. ( Endothermic, Exothermic )
8. Any reaction or process that releases heat energy ( Endothermic, Exothermic )
9. Condensation of steam ( Endothermic, Exothermic )
10. Sublimation of iodine. ( Endothermic, Exothermic )
11. Vaporization of ethanol ( Endothermic, Exothermic )

Explicación

Pregunta 4 de 11

1

Is the following process an endothermic process or exothermic?
Ammonium chloride dissolving in water which causes the temperature of the solution to drop

Arrastra y suelta para completar el texto.

    Endothermic
    Exothermic

Explicación

Pregunta 5 de 11

1

In Chemical Reactions which of the following always happens?

Selecciona una o más de las siguientes respuestas posibles:

  • a. conservation of mass?

  • c. conservation of the number of molecules?

  • b. conservation of the number of atoms?

  • d. conservation of the number of moles?

Explicación

Pregunta 6 de 11

1

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How many molecules of nitrogen does one molecule of N2H4 give (write only in numbers

Explicación

Pregunta 7 de 11

1

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How many molecules of water does one molecule of N2H4 give ? write only numbers

Explicación

Pregunta 8 de 11

1

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How many moles of nitrogen does one mole of N2H4 give (write only numbers as digits)

Explicación

Pregunta 9 de 11

1

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How many moles of water does one mole of N2H4 give

Explicación

Pregunta 10 de 11

1

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How many grams are there in one mole of N2H4? g

Explicación

Pregunta 11 de 11

1

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How many grams are there in three moles of H2 g

Explicación