Tag: evs

Questions Related to evs

On the basis of composition, which of the following is a type of matter?

evs look, learn and experience brief introduction to atoms of elements elements and atoms introduction of atom

  1. Compound

  2. Solid

  3. Liquid

  4. Both b and c

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Correct Option: A
Explanation:

On the basis of composition, matter can be classified as compound, element and mixture. Solids, liquids and gases are physical states of matter.

Which of the following is a matter?

evs look, learn and experience brief introduction to atoms of elements elements and atoms introduction of atom

  1. Chair

  2. Smell

  3. Love

  4. Cold

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Correct Option: A
Explanation:

Anything that occupies space and has mass is called as matter. Smell, love and cold does not occupy space and has no mass. Hence, they are not matter.

Which of the following are states of matter?

evs look, learn and experience brief introduction to atoms of elements elements and atoms introduction of atom

  1. solid

  2. liquid

  3. gases

  4. all of the above

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Correct Option: D
Explanation:

There are three states of matter: Solid, liquid, gases.

The state or phase of a given set of matter can change depending on _____________.

evs look, learn and experience brief introduction to atoms of elements elements and atoms introduction of atom

  1. temperature

  2. pressure

  3. Both a and b

  4. None of above

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Correct Option: C
Explanation:

The state or phase of a given set of matter can change depending on pressure and temperature conditions, transitioning to other phases as these conditions change to favor their existence; for example, solid transitions to liquid with an increase in temperature. Near absolute zero, a substance exists as a solid.

Identify which of the following has mass and takes up space is :

evs look, learn and experience brief introduction to atoms of elements elements and atoms introduction of atom

  1. energy

  2. work

  3. matter

  4. acceleration

  5. force

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Correct Option: C
Explanation:

Anything that has mass and posses space is known as matter.


Hence the correct option is C.

More than one may be correct:
The number of g-atoms of nitrogen in its $7gm$ is equal to number of g-atoms in

evs look, learn and experience brief introduction to atoms of elements elements and atoms introduction of atom

  1. $6gm$ $Mg$

  2. $28gm$ $fe$

  3. $30gm$ $Ca$

  4. $20gm$ $Hg$

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Correct Option: A

The matter can not be perceived through our senses.

evs look, learn and experience brief introduction to atoms of elements elements and atoms introduction of atom

  1. True

  2. False

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Correct Option: B
Explanation:

The matter can be perceived through our senses. Example: water is matter and we can sense it by touching it and by seeing it.

Which of the following is not matter?

evs look, learn and experience brief introduction to atoms of elements elements and atoms introduction of atom

  1. Air

  2. Water

  3. Light

  4. Sofa

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Correct Option: C

Which of the following changes increases the overall density of the object?

evs look, learn and experience brief introduction to atoms of elements elements and atoms introduction of atom

  1. A block of iron is formed into a hollow shape

  2. A submarine fills its ballast tanks with water

  3. A submarine fills its ballast tanks with air

  4. A fish increases the amount of gas in its swim bladder

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Correct Option: B
Explanation:

When a low-density substance is replaced by high-density substance,the overall density increases.Here air which has low density compared to water is replaced.So,the overall density increases while in removing cases overall density decreases.


Option B is correct.

The spaces between molecules is least in :

evs look, learn and experience brief introduction to atoms of elements elements and atoms introduction of atom

  1. Solid

  2. Liquid

  3. Gases

  4. Vapour

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Correct Option: A
Explanation:

In solid state the intermolecular forces are maximum and the molecules are very closely packed.