Tag: chemistry

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Questions Related to chemistry

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

The property of compressibility is :

  1. maximum in solids

  2. least in solids

  3. maximum in liquids

  4. least in gases
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

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?

  1. Amount of liquid

  2. Size of the container

  3. Number of marbles and beads

  4. Mass and volume of the marbles and beads
Reveal answer Fill a bubble to check yourself
A,B,C Correct answer
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

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

Which of the following statements about water are correct?

  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
Reveal answer Fill a bubble to check yourself
A,C,D Correct answer
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.

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

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

  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
Reveal answer Fill a bubble to check yourself
D Correct answer
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 $20^oC - 22^oC$

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

A table made by iron is solid because:

  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.
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

An electrolyte:

  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
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

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

Which of the following is an electrolyte?

  1. $AgNO _3$ solution

  2. Alcohol

  3. Mercury

  4. Sugar solution
Reveal answer Fill a bubble to check yourself
A Correct answer
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.