Tag: chemistry

Questions Related to chemistry

In liquid and solid states the bond lengths and bond angles are slightly changed.

chemistry matter in our surroundings diffusion in different states of matter properties of solids, liquid, and gas particle theory of matter

  1. True

  2. False

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Correct Option: A
Explanation:

In liquid and solid states the bond lengths and bond angles are slightly changed due tohydrogen bonding.

Which produces more burn, steam or boiling water?

chemistry matter in our surroundings diffusion in different states of matter properties of solids, liquid, and gas particle theory of matter

  1. Steam

  2. Boiling water

  3. Both produces same burn

  4. Data insufficient

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Correct Option: A
Explanation:

Water vapour at 373K has more energy than water at 373K as the steam has absorbed latent heat of vaporisation to change the state. Therefore the more burning sensation.

The chemical reaction between quicklime and water is characterised by:

chemistry matter in our surroundings diffusion in different states of matter properties of solids, liquid, and gas particle theory of matter

  1. Evolution of hydrogen gas

  2. Suspension of slaked lime in water

  3. Change in temperature of mixture

  4. Change in colour of product

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Correct Option: B,C
Explanation:

Quicklime when added to water, it reacts with water chemically and form a suspension of slaked lime in water and produce heat energy. So it also results in an increase in temperature of the mixture.

$CaO+{ H } _{ 2 }O\rightarrow Ca{ (OH) } _{ 2 }+Heat$

Which states of matter has no miscibility?

chemistry matter in our surroundings diffusion in different states of matter properties of solids, liquid, and gas particle theory of matter

  1. Solids

  2. Liquids

  3. Gases

  4. Both B and C

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Correct Option: A
Explanation:

Solids do not mix with each other as there is very less space between the atoms of solids and are tightly packed.


Hence, the correct option is $A$.


State having indefinite shape but definite volume is:

chemistry matter in our surroundings diffusion in different states of matter properties of solids, liquid, and gas particle theory of matter

  1. solid.

  2. liquid.

  3. gas.

  4. liquid and gas.

Show answer
Correct Option: B
Explanation:

Solid has highest inter-molecular force of attraction. Liquids has inter-molecular force of attraction less than solid but greater than Gas. So, it has indefinite shape but definite volume.


Hence, the correct option is $B$.


Diffusion is negligible in case of:

chemistry matter in our surroundings diffusion in different states of matter properties of solids, liquid, and gas particle theory of matter

  1. solid.

  2. liquid.

  3. gas.

  4. solid and liquid.

Show answer
Correct Option: A
Explanation:

Due to high inter-molecular force of attraction and very small inter-molecular spaces diffusion is negligible in solid.

Particle in solid have lowest kinetic energy so they do not move.


Hence, the correct option is $A$.


Arrange the following in order of increasing kinetic energy of their particles.

Mercury, Stone, Oxygen.

chemistry matter in our surroundings diffusion in different states of matter properties of solids, liquid, and gas particle theory of matter

  1. Oxygen > Stone > Mercury

  2. Oxygen > Stone < Mercury

  3. Oxygen < Stone > Mercury

  4. Stone < Mercury < Oxygen

Show answer
Correct Option: D
Explanation:

The kinetic energy of gases is maximum because inter-molecular force of attraction is minimum and kinetic energy is minimum in solid .


Stone < Mercury < Oxygen

Hence, the correct option is $D$.

Which of the following states of matter has most number of particles per unit area?

chemistry matter in our surroundings diffusion in different states of matter properties of solids, liquid, and gas particle theory of matter

  1. Solids

  2. Liquids

  3. Gases

  4. All of the above

Show answer
Correct Option: A
Explanation:

Solids have most number of particles per unit area. The molecules are very tightly packed and solids have high density.


Hence, the correct option is $A$.


The process that absorbs latent heat is:

chemistry matter in our surroundings diffusion in different states of matter properties of solids, liquid, and gas particle theory of matter

  1. melting

  2. evaporating

  3. sublimation

  4. all of above

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Correct Option: D
Explanation:

Latent heat is energy released or absorbed, by a body or a thermodynamic system, during a constant-temperature process that is specified in some way. An example is latent heat of fusion for a phase change, melting, at a specified temperature and pressure. Latent heat is associated with the phase changes of atmospheric water vapor, mostly vaporization and sublimation.

The more light the object absorbs, the:

chemistry matter in our surroundings diffusion in different states of matter properties of solids, liquid, and gas particle theory of matter

  1. less heat absorbed

  2. more heat absorbed

  3. no heat absorbed

  4. maximum heat released

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Correct Option: B
Explanation:

The more light the object absorbs, the more heat absorbed since light is energy. If you consider it a color, black absorbs the most heat. A black object absorbs all wavelengths of light and reflects none. Objects that are white, on the other hand, reflect all wavelengths of light and therefore absorb the least heat.