Sublimation
Chemistry ⇒ States of Matter
Sublimation starts at 7 and continues till grade 12.
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A mixture contains ammonium chloride, sodium chloride, and sand. Which component can be separated by sublimation?
A scientist observes that a certain solid, when heated, turns directly into a gas without melting. What is this process called?
A student heats a mixture of iodine and sand. After some time, purple vapors are seen and then solid iodine is collected on a cold surface. What process is being demonstrated?
Describe the difference between evaporation and sublimation.
A mixture contains ammonium chloride, sodium chloride, and sand. Which component can be separated by sublimation?
A scientist observes that a certain solid, when heated, turns directly into a gas without melting. What is this process called?
A student heats a mixture of iodine and sand. After some time, purple vapors are seen and then solid iodine is collected on a cold surface. What process is being demonstrated?
A sealed container contains a small amount of solid iodine and air. The container is kept at a constant temperature. After several days, shiny purple crystals are observed on the cooler walls of the container. Explain the processes involved and name them.
Sublimation can be used to separate which type of mixtures? (1) Two solids, one of which sublimes (2) Two liquids (3) A solid and a liquid (4) Two gases
Which of the following best defines sublimation? (1) The process where a solid changes directly into a gas without passing through the liquid state (2) The process where a liquid changes into a gas (3) The process where a gas changes into a solid (4) The process where a solid changes into a liquid
Which of the following best explains why naphthalene balls become smaller over time when exposed to air? (1) They melt (2) They dissolve (3) They sublimate (4) They decompose
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
Fill in the blank: Dry ice is the solid form of __________.
Fill in the blank: The direct change of a solid to a gas is called __________, while the reverse process is called __________.
Fill in the blank: The process in which a gas changes directly into a solid is called __________.
Fill in the blank: The process of sublimation is used in the __________ industry for dyeing fabrics.
Is the following statement true or false? 'Sublimation is used in the purification of substances.'
True or False: All solids can undergo sublimation under normal atmospheric conditions.
True or False: Sublimation can be reversed by deposition.
True or False: Sublimation can occur at any temperature and pressure.
