Question

Answer: Sublimation is the property of
substance in which they are converted
directly from solid to gas or vice versa. Such
substances are known as sublime Some
examples of solids which sublime are
ammonium chloride, camphor, naphthalene
and anthracene. Let us perform an activity to
separate a mixture of ammonium chloride
and salt
Take a mixture of ammonium chloride and
salt in a china dish cover it inverted conical
transparent funnel. At the other end of the
funnel put a cotton plug so that vapour could
not come out Now place china dish on a
burner. As the ammonium chloride is sublime
after heating it will directly converted into
vapour and this vapour will again condense at
the upper colder part of funnel to form solid
ammonium chloride. In this way the mixture
ammonium chloride and salt can be
separated by the sublimation method.
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1. What is the sublimation process?
2. What things can sublimate?
3. Does sublimation require heat?
4. How is sublimation used in everyday life?
5. Choose the correct options.
Which of the following is not an
example of sublimate?
a) Camphor
b) Naphthalene
c) lodine
d) Nitrates
ii)
Which of the following solids undergo
sublimation?
a) Sodium chloride
b) lodine crystals
c) Sodium carbonate
d) Sodium bicarbonate
ii)
A mixture of ammonium chloride and
sodium chloride is separated by using:
a) Distillation
b) Crystallization
c) Sublimation
d) Magn aration
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Answer 1

Answer:

1. Sublimation is a type of phase transition, or a change in a state of matter, just like melting, freezing, and evaporation. Through sublimation, a substance changes from a solid to a gas without ever passing through a liquid phase. Dry ice, solid CO2, provides a common example of sublimation.

2. Sublimation blanks and pre-treated objects, such as smart phone covers, mugs, ceramic plates, picture frames, sporting goods, buttons and others are available for sublimation by this handy device. These are just three of the many facets of dye-sublimation printing to consider.

3. Sublimation does not require heating . Sublimation is a process of conversion of solid into vapor state and vapour into solid state without coming in liquid state. ... And this happens not because of heat it is a natural phenomenon as it gains the heat from the surface .

4. There are many examples of sublimation in daily life: The air fresheners used in toilets. The solid slowly sublimes and releases the pleasant smell in the toilet over a certain period of time. ... Dry ice, or solid carbon dioxide is used for cooling items, store special adhesives and also used for neutralizing alkalis.

5. Nitrates is not a example of sublimation

6. The Iodine Crystal Undergo in sublimation

7. A mixture of ammonium chloride and

mixture of ammonium chloride andsodium chloride is separated by using Crystallization

Answer 2

Answer:

Sublimation is the property of

substance in which they are converted

directly from solid to gas or vice versa. Such

substances are known as sublime Some

examples of solids which sublime are

ammonium chloride, camphor, naphthalene

and anthracene