Sublimation
Chemistry ⇒ States of Matter
Sublimation starts at 7 and continues till grade 12.
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See sample questions for grade 9
A mixture contains iodine and sand. How can you separate the iodine from the sand?
A scientist observes that a certain solid disappears when heated, leaving no liquid behind. What process is likely occurring?
A student heats a mixture of sand and ammonium chloride. After heating, only sand remains in the dish. Explain why.
Describe how you would demonstrate sublimation in a laboratory setting.
Describe the difference between sublimation and evaporation.
A mixture contains iodine and sand. How can you separate the iodine from the sand?
A scientist observes that a certain solid disappears when heated, leaving no liquid behind. What process is likely occurring?
A student heats a mixture of sand and ammonium chloride. After heating, only sand remains in the dish. Explain why.
Which of the following best describes the energy change during sublimation?
(1) Energy is absorbed
(2) Energy is released
(3) No energy change
(4) Energy is both absorbed and released
Which of the following best explains why dry ice is used to create fog effects in stage shows?
(1) It melts into water
(2) It sublimes into carbon dioxide gas
(3) It evaporates quickly
(4) It burns easily
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 boiling
(2) Frost forming on a cold surface
(3) Ice melting
(4) Camphor vaporizing
Fill in the blank: Solid carbon dioxide is commonly known as __________.
Fill in the blank: Sublimation is used in the __________ of certain substances from mixtures.
Fill in the blank: The energy required for a solid to sublime is called __________ heat of sublimation.
Fill in the blank: The process in which a solid changes directly into a gas is called __________.
Is the following statement true or false? 'Dry ice is solid carbon dioxide that sublimes at room temperature.'
True or False: All solids can undergo sublimation under normal atmospheric conditions.
True or False: Sublimation can be observed in the natural environment, such as snow disappearing without melting.
True or False: Sublimation can be used to purify substances.
