Tag: chemistry

Questions Related to chemistry

A liquid cannot be compressed because it has a fixed volume

chemistry materials around us and different types of houses materials around us matter and its states different states of matter

  1. True

  2. False

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Correct Option: A
Explanation:

A liquid cannot be compressed because its particles are closely packed due to which it has a fixed volume.

Water vapour and steam are similar because they have no definite shape and no definite ________.

chemistry materials around us and different types of houses materials around us matter and its states different states of matter

  1. size

  2. mass

  3. volume

  4. temperature

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Correct Option: C
Explanation:

Water vapour and steam are the gases states of matter. Gases have no definite shape and no definite volume.

The property of compressibility is :

chemistry materials around us and different types of houses materials around us matter and its states different states of matter

  1. maximum in solids

  2. least in solids

  3. maximum in liquids

  4. least in gases

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Correct Option: B
Explanation:

Solids are held in fixed positions, they can only vibrate. Because the particles can not move, solids have a definite shape and volume, and can't flow. Because the particles are already packed closely together, solids can't easily be compressed.

Anu wanted to find out which solid, marbles or beads, occupy more space. In order to be a fair test what things should be kept same?

chemistry materials around us and different types of houses materials around us matter and its states different states of matter

  1. Amount of liquid

  2. Size of the container

  3. Number of marbles and beads

  4. Mass and volume of the marbles and beads

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Correct Option: A,B,C
Explanation:

A matter is something that has mass and occupies space. Both marbles and beads are matter since they have mass and occupy space. In order to measure which one occupies more space, the amount of liquid, size of the container and number of marbles and beads are required. The amount of liquid displaced by the solid will be the space occupied by the solid. Higher the displaced volume, higher the space occupied. Since space occupied is independent of mass and hence D is incorrect

Which of the following statements about water are correct?

chemistry materials around us and different types of houses materials around us matter and its states different states of matter

  1. Water has a fixed mass

  2. Water can be compressed

  3. Water takes the shape of its container

  4. Water has a fixed volume

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Correct Option: A,C,D
Explanation:

Water is a liquid hence it will show all the properties of liquids, it can take the shape of container, it has fixed mass and volume and very less compressible.


Hence the correct options are A, C and D.

Water is liquid at room temperature. Which of the following is the correct reason to justify it?

chemistry materials around us and different types of houses materials around us matter and its states different states of matter

  1. In water, the inter molecular forces are strong enough to keep its particle bound with each other

  2. The melting point of water is below room temperature

  3. Its boiling point is above room temperature

  4. All of above

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Correct Option: D
Explanation:

The intermolecular force of attraction between the water molecules is strong enough to keep the molecules/particles bound to each other. The melting point of water is below room temperature as it is already present in the liquid state whereas, its boiling point is above room temperature, i.e; $100^oC$ and room temperature is $20^oC - 22^oC$

In which of the following state inter molecular force is maximum :

chemistry materials around us and different types of houses materials around us matter and its states different states of matter

  1. solid

  2. liquid

  3. gas

  4. plasma

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Correct Option: A
Explanation:

Intermolecular forces of attraction are maximum in solids and minimum in gases, as solids have definite shape, and particles are closely packed.

A table made by iron is solid because:

chemistry materials around us and different types of houses materials around us matter and its states different states of matter

  1. it has fixed shape because of strong molecular forces.

  2. it can not be deformed easily because of strong molecular forces.

  3. it is metal.

  4. None of these.

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Correct Option: B
Explanation:

The iron table is solid because the intermolecular force of attraction of the iron table is very strong, thus it is rigid and hence cannot be deformed.

An electrolyte:

chemistry electrolysis electrolytes and non-electrolytes introduction to electrolysis chemical reactions

  1. has positive charge

  2. has negative chargec

  3. should be able to conduct charge without dissociating

  4. should able to form positive and negative ions

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Correct Option: D
Explanation:

A Chemical compound that conducts electricity by changing into ions like cations and anions when melted or dissolved into a solution.

Eg: Sodium chloride.

Which of the following is an electrolyte?

chemistry electrolysis electrolytes and non-electrolytes introduction to electrolysis chemical reactions

  1. $AgNO _3$ solution

  2. Alcohol

  3. Mercury

  4. Sugar solution

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Correct Option: A
Explanation:

Electrolyte is a substance that dissociates into ions in a solution and acquires the capacity to conduct electricity. Electrolysis is the dissociation of an electrolyte into ions at the electrodes by the passage of electric current.
During the electrolysis of silver nitrate solution, silver gets deposited at the cathode, while the anode loses an equal amount of Ag. Hence, $Ag{ NO } _{ 3 }$ is an electrolyte.