Class 7 chemistry Matter around us
Tick (✔) The correct choice amongest the following
1. Which of the following is not a matter ? (a) Shadow (b) Chair (c) Toast (d) Juice
Answer
(a) Shadow
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2. What can be poured from one vessel to another ? (a) Solids (b) Fluids (c) Air (d) Water
Answer
(b) Fluids
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3. Maximum intermolecular spaces are present between : (a) Solids (b) Liquids (c) Gases (d) All of the above
Answer
(a) Solids
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4. Physical states of matter can be interchanged by : (a) Heating (b) Cooling (c) Heating or cooling (d) None of the above
Answer
(c) Heating and cooling
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5. Mixture of two phases : (a) Gas (b) Solid (c) Liquid (d) Vapour
Answer
Vapour
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Write True False for each statement, Rewrite the false statements
1. Solids have high densities, are rigid and hard.
Answer
True
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2. Gaseous state have least kinetic energy.
Answer
False
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3. Love, hate, shadow cannot be classified as matter.
Answer
True
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4. The process in which solid gets converted to liquid state is known as sublimation.
Answer
True
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5. Naphthalene and camphor are sublimable compounds.
Answer
False
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Select the Odd and Out Giving reason
1. Melting, freezing, evaporation, sublimation
Answer
Sublimation
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2. Napthalene, camphor, iodine, common salt
Answer
Common salt
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3. Water, juice, oil, ice-cream
Answer
Ice-cream
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