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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