Gases

Descripción

Some mixed exam-like Qs
Joanna van Dyk
Test por Joanna van Dyk, actualizado hace más de 1 año
Joanna van Dyk
Creado por Joanna van Dyk hace más de 8 años
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Resumen del Recurso

Pregunta 1

Pregunta
Oxygen can be produced by the decomposition of hydrogen peroxide (H2O2). What is the equation for this reaction?
Respuesta
  • 2H2O2 = O2 +2H2O
  • H2O2 = 2O + H2
  • 2H2O2 + CO2 = HCO3 + H2 + H2O

Pregunta 2

Pregunta
Oxygen can be produced by the decomposition of hydrogen peroxide (H2O2). What is a suitable catalyst for this reaction?
Respuesta
  • Manganese oxide
  • Phosphorus
  • Sulphur Dioxide
  • Lead Nitrate

Pregunta 3

Pregunta
Oxygen can be produced by the decomposition of hydrogen peroxide (H2O2). What is the percentage of oxygen in air at atmospheric pressure
Respuesta
  • 21%
  • 78%
  • 0.04%
  • 1%

Pregunta 4

Pregunta
Other elements can combust in oxygen. Write a balanced equation for the combustion of sulphur.
Respuesta
  • S + O2 = SO2
  • S + O2 = SO4
  • S + O2 = SO + H2O

Pregunta 5

Pregunta
SO2 dissolves in rainwater to form an acidic solution.
Respuesta
  • True
  • False

Pregunta 6

Pregunta
Write a balanced equation for the combustion of hydrogen: [blank_start]2[blank_end]H2 + O2 = 2[blank_start]H2O[blank_end]
Respuesta
  • 2
  • H2O

Pregunta 7

Pregunta
Select two uses for carbon dioxide:
Respuesta
  • fizzy drinks
  • fire extinguishers
  • sterilization
  • laughing gas
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