Sublimation
Chemistry ⇒ States of Matter
Sublimation starts at 7 and continues till grade 12.
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See sample questions for grade 12
A mixture contains naphthalene and sodium chloride. Which method would you use to separate them and why?
A sample of dry ice is left at room temperature. What will you observe after some time?
A student heats a mixture of ammonium chloride and sodium chloride. Only white fumes are observed and collected on a cold surface. Which process is responsible for this observation?
Describe the difference between sublimation and evaporation.
A mixture contains naphthalene and sodium chloride. Which method would you use to separate them and why?
A sample of dry ice is left at room temperature. What will you observe after some time?
A student heats a mixture of ammonium chloride and sodium chloride. Only white fumes are observed and collected on a cold surface. Which process is responsible for this observation?
A 2.00 g sample of iodine is heated in a closed container at 25°C. After some time, the mass of solid iodine decreases to 1.50 g. Calculate the mass of iodine vapor formed, assuming no iodine escapes the container.
Which of the following best defines sublimation? (1) The process by which a solid changes directly into a gas without passing through the liquid state (2) The process by which a liquid changes into a gas (3) The process by which a gas changes into a solid (4) The process by which a solid changes into a liquid
Which of the following best describes the energy change during sublimation? (1) Energy is released (2) Energy is absorbed (3) No energy change (4) Energy is both released and absorbed
Which of the following conditions favor sublimation? (1) High pressure and low temperature (2) Low pressure and high temperature (3) High pressure and high temperature (4) Low pressure and low temperature
Which of the following is a correct example of deposition? (1) Water vapor turning into ice (2) Ice melting into water (3) Camphor turning into vapor (4) Dry ice turning into gas
Fill in the blank: The direct conversion of a gas to a solid is called _______.
Fill in the blank: The enthalpy change associated with sublimation is called the _______ of sublimation.
Fill in the blank: The process of _______ is responsible for the formation of frost on cold surfaces.
Fill in the blank: The process of _______ is used in freeze-drying to remove water from food products.
Is the following statement true or false? 'Sublimation can occur only under vacuum.'
True or False: All solids can undergo sublimation under standard atmospheric conditions.
True or False: Sublimation can be observed in the freeze-drying process used to preserve food.
True or False: Sublimation can be used to separate a mixture of two solids if only one of them sublimes.
