Tag: the liquid state

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Questions Related to the liquid state

Multiple choice chemistry materials liquid crystals liquid state the liquid state

At high altitudes, water boils at a lower temperature because

  1. the atmospheric pressure is high at high altitudes

  2. the viscosity of water is reduced at high altitudes

  3. the atmospheric pressure is low at high altitudes

  4. the surface tension of water is reduced at high altitudes
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The boiling of water depends on the atmospheric pressure at that altitude. At high altitudes, the pressure is lower, so water can not boil at $100°$. As the altitude increases, the boiling point of water reduces.

Multiple choice chemistry materials liquid crystals liquid state the liquid state

Liquids are similar to gases because:

  1. both possess the property of flowing and take the volume of the containers

  2. both diffuse and take the shape of the containers

  3. both are readily compressible and diffuse

  4. both are capable of infinite expansion
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Liquids and gases are similar in both shape and volume because they both have its' shape determined by its' surroundings. 

$\Longrightarrow $ Both diffuses and take the shape of containers.

Multiple choice chemistry materials liquid crystals liquid state the liquid state

Atmospheric pressures recorded in different cities are as follows:

Cities Shimla Bangalore Delhi Mumbai
$p$ in $N/m^{2}$ $1.01\times 10^{5}$ $1.2\times 10^{5}$ $1.02\times 10^{5}$ $1.21\times 10^{5}$


Consider the above data and mark the place at which liquid will boil first.

  1. Shimla

  2. Bangalore

  3. Delhi

  4. Mumbai
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The boiling point of a liquid is the temperature at which vapour pressure becomes equal to the atmospheric pressure. Lower the atmospheric pressure, lower is the boiling point.

Since the atmospheric pressure of the Shimla is minimum, thus the boiling point of the liquid will be lowest at Shimla.

Multiple choice chemistry materials liquid crystals liquid state the liquid state

Metallic liquids contain:

  1. metal atoms

  2. ions and mobile electrons

  3. aggregates of metal atom

  4. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When metals are in liquids, they dissociate into ions and give away electrons. So, metallic liquids contain ions and mobile electrons.

Ex: $Na _{(s)}\longrightarrow Na^+ _{(ag)}+e^-$
Ex: $Mg _{(s)}\longrightarrow Mg^{+2} _{(ag)}+2e^-$

Multiple choice chemistry materials liquid crystals liquid state the liquid state

When a solid crystal is melted, it should become a liquid. Liquid crystals are an intermediate stage between a liquid and a crystal. Which of the following is a liquid crystal of a non-living system?

  1. Cholesteryl bromide

  2. Axons of nerve

  3. Striated muscle fibre

  4. Cilia
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Axons of nerve, striated muscle fibre, cilia all belong to bio-logical living systems.

Cholesteryl bromide $(C _{27}H _{45}Br)$ is a liquid crystal of a non-living system.