Chemistry · Science General

States of Matter

2,382 Questions

States of matter questions explore physical changes, evaporation, phase transitions, and the properties of liquids and gases. Topics cover density, cryosurgery, heavy water, and electrolytes. This foundational chemistry topic frequently appears in general science sections of SSC and railway exams.

Phase change mechanismsEvaporation and temperature effectsProperties of liquidsPhysical versus chemical changesElectrolytes and heavy water

States of Matter Questions

Multiple choice chemistry properties of natural resources conservation of water and recycling properties of water structure and properties of water

Which of the following is a universal solvent?

  1. water

  2. alcohol

  3. acetic acid

  4. both A and B
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Water is  a universal solvent.  Water is capable of dissolving a variety of different substances. It dissolves more substances than any other liquid. Water is important to every living thing on earth. Wherever water goes, either through the ground or through our bodies, it takes along valuable chemicals, minerals, and nutrients.

Multiple choice chemistry properties of natural resources conservation of water and recycling properties of water structure and properties of water

Water is ______ in nature?

  1. acidic

  2. basic

  3. neutral

  4. none of above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Water is neutral in nature.
Since pH is defined as the negative log of the hydrogen ion concentration, the pH of pure water is 7 or neutral. Pure water is neutral because the number of positive hydrogen ions produced is equal to the number of negative hydroxide ions.

Multiple choice chemistry properties of natural resources conservation of water and recycling properties of water structure and properties of water

Which property of water is used while washing clothes?

  1. Odour

  2. Colour

  3. Solubility

  4. Sand
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Water is a good solvent. It combine with dirt and other particles with it when treated with soap, which is water soluble and form lather in water. Hence due to its solubility it is used while washing clothes. 

Multiple choice chemistry properties of natural resources conservation of water and recycling properties of water structure and properties of water

Water has maximum density at

  1. Room temperature
  2. ${4}^{o}C$
  3. ${0}^{o}C$
  4. $-{4}^{o}C$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
When Water is in its Solid Form (Ice) below $0^0 C$, it is forced into a regular Cage like Structure with small voids due to which the Volume of Ice is larger.
At $4^0 C$, the Cage like Structure of Ice starts to break and the molecules can slide along each other, closing the empy voids due to which momentarily the Volume of Water decreases. Due to decrease in Volume, Density increases because Density is inversely proportional to Volume.
As temperature rises to over $4^0 C$, the extra space needed by increased motion of water molecules starts being larger than the space gained due to structural changes and the molecules start to move away from each other due to which the Volume again increases and Density decreases.

Thus, Density maximum is reached at $4^0C$.
Multiple choice chemistry properties of natural resources conservation of water and recycling properties of water structure and properties of water

Evaporation of water is:

  1. a process is which neither heat is evolved nor absorbed

  2. a process accompanied by chemical reaction

  3. an exothermic change

  4. an endothermic change
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Evaporation is an endothermic process because water molecules must absorb heat from the surroundings to increase their kinetic energy. For example, sweat which cools the human body as it evaporates from the skin.

Hence (D) option is correct.

Multiple choice chemistry properties of natural resources conservation of water and recycling properties of water structure and properties of water

Ice is lighter than water as

  1. Lattice aggregates occupy more space.

  2. Cold water is extremely dense.

  3. Hydrogen bonds are absent in ice.

  4. Lattice aggregates are absent in ice.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
When water freezes, water molecules form a crystalline structure maintained by hydrogen bonding. Solid water, or ice, is less dense than liquid water. Ice is less dense than water because the orientation of hydrogen bonds causes molecules to push farther apart, which lowers the density.

Multiple choice chemistry properties of natural resources conservation of water and recycling properties of water structure and properties of water

Statement 1: Ice is less dense than liquid water.
Statement 2: Water molecules are nonpolar.

  1. <p>Both Statement 1 and Statement 2 are correct and Statement 2 is the correct explanation of Statement 1.</p>

  2. <p>Both Statement 1 and Statement 2 are correct and Statement 2 is not the correct explanation of Statement 1.</p>

  3. <p>Statement 1 is correct but Statement 2 is not correct.</p>

  4. <p>Statement 1 is not correct but Statement 2 is correct.</p>

  5. <p>Both the Statement 1 and Statement 2 are not correct. </p> <p>

    </p>
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Statement 1: Ice is less dense than liquid water.
Hence, an ice cube floats in a glass of water.
Statement 2: Water molecules are polar due to electronegativity difference between O and H atoms and non linear structure of water molecule.
Hence, statement 1 is correct but statement 2 is not correct.

Multiple choice chemistry properties of natural resources conservation of water and recycling properties of water structure and properties of water

$I$. Melting is an exothermic process.
$II$. Heat energy will cause covalent bonds in water to break as water converts from the solid state to the liquid state.

  1. Statement $I$ is true, Statement $II$ is true
  2. Statement $I$ is true, Statement $II$ is false
  3. Statement $I$ is false, Statement $II$ is true
  4. Statement $I$ is false, Statement $II$ is false
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Melting is endothermic. Melting process needs energy to convert it from solid to liquid state.

Ice melts when heat energy causes the molecules to move faster, breaking of hydrogen bonds between molecules to form liquid water. In the melting process, the water molecules actually absorb energy.

Multiple choice chemistry properties of natural resources conservation of water and recycling properties of water structure and properties of water

Which one of the following statements about water is false?

  1. Ice formed by heavy water sinks in normal water

  2. Water is oxidized to oxygen during photosynthesis

  3. Water can act both as an acid and as a base

  4. There is extensive intramolecular hydrogen bonding in the condensed phase
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Water possesses intermolecular hydrogen bonding in the condensed phase rather than intramolecular hydrogen bonding. Therefore statement (D) is incorrect