Chemistry · Science General

States of Matter

2,682 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 mix and separate different types of solutions various mixtures introduction to solutions

Which of the following sequences lists the relative sizes of particles in a water mixture from smallest to largest?

  1. Solutions, suspensions, colloids

  2. Solutions, colloids, suspensions

  3. Colloids, solutions, suspensions

  4. Colloids, suspensions, solutions

  5. Suspensions, colloids, solutions
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
The sequence that gives the relative sizes of particles in a water mixture from smallest to largest is solutions, colloids, suspensions. In true solution, the particle size is 0.1 nm to 1.0 nm. In colloidal solution, the particle size is 1 nm to 1000 nm. In suspension, the particle size is more than 1000 nm.
Multiple choice chemistry mix and separate different types of solutions various mixtures introduction to solutions

Which of the following sequences lists the relative sizes of particles in a water mixture from smallest to largest?

  1. Solutions, suspensions, colloids

  2. Solutions, colloids, suspensions

  3. Colloids, solutions, suspensions

  4. Colloids, suspensions, solutions

  5. Suspensions, colloids, solutions
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
The increasing order for the relative particle size is solutions ( 0.1 to 1 ) < colloids  (1 to 1000 ) < suspensions (more than 1000). The numbers in parenthesis refer to particle size in nm.
Multiple choice chemistry mix and separate different types of solutions various mixtures introduction to solutions

A solution is defined as a:

  1. homogeneous mixture of two or more substances

  2. hetrogeneous mixture of two or more substances

  3. homogeneous mixture of liquid and solid components only

  4. homogeneous mixture consisting of water as one of the components
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A solution is a homogeneous mixture of two or more substances. A solution may exist in any phase. For example, in a saline solution, salt is the solute dissolved in water as the solvent.

Multiple choice types of cells electricity physics

Which one of the following solutions can be electrolysed ?

  1. Mercury

  2. Distilled water

  3. Solution of common salt

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

When dissolved in fluid, salts tend to break apart into their component ions, creating an electrically-conductive solution. Common salt is one such salt. common salt is  $ NaCl$ which gives $Na^+$ and $Cl^-$.

Multiple choice physics upthrust in fluids, archimedes' principle and floatation experimental verification of archimedes' principle archimedes' principle archimedes' principle and its applications

A block of ice with a lead shot embedded in It is floating on water contained in a vessel. The temperature of the system is maintained at $0^{\circ}$ C as the ice melts. When the ice melts completely the level of water in the vessel rises.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

According to Archemedies principle if any object is floating on a liquid the weight of the liquid displaced is equal to the weight of the object, when the block of ice melts the bullet ultimately sink in water and displaces the same volume of water as its own volume was, but when it was embedded in the ice it displaced move volume, therefore level of water will fall.

Multiple choice geography rivers, coasts and glaciation rivers rivers and their work exogenic forces

Which of the following plays important role in chemical weathering?

  1. Temperature

  2. Water

  3. Crystal growth

  4. Frost
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Water plays an important role in chemical weathering. Rock is a mixture of many minerals and water is a universal solvent. Chemical weathering takes place in the areas which receives heavy rainfall. Chemical weathering occurs in the following ways: Carbonation, Solution and Oxidation.

Multiple choice chemistry separation of matter crystals and crystallisation filtration and crystallisation other methods of separation

During crystallization of copper sulphate, heating is stopped when :

  1. solution becomes saturated

  2. solution reaches boiling point

  3. solution is reduced to half of its quantity

  4. the solution is not heated at all
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Crystallization process begins with dissolving the impure copper sulphate sample in water and then heating it. It is heated to saturation rather than dryness and once it is saturated the heating is stopped and the solution is allowed to cool.

Multiple choice chemistry separation of matter crystals and crystallisation filtration and crystallisation other methods of separation

Crystallization is a process of :

  1. cooling a hot concentrated solution of a substance to obtain beads

  2. cooling a hot concentrated solution of a substance to obtain crystals

  3. heating a solution to obtain beads

  4. all of above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Crystallization is a process of cooling a hot, concentrated solution of a substance to obtain crystals. It is used to obtain pure solid from impure sample.

Multiple choice chemistry separation of matter crystals and crystallisation filtration and crystallisation other methods of separation

The process of crystallization begins by:

  1. cooling in ice

  2. evaporation by heating

  3. passing to porous material

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

Crystallisation is a separation technique that is used to separate. a solid that has dissolved in a liquid and made a solution. The solution is warmed in an open container, allowing the solvent to evaporate, leaving a saturated solution. A solution that has as much solid dissolved in it.

Multiple choice chemistry separation of matter crystals and crystallisation filtration and crystallisation other methods of separation

Why is crystallization better than evaporation to dryness?

  1. Solids get charred in evaporation

  2. Solids get decomposed in evaporation

  3. Impurities do not get removed in evaporation

  4. All of above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Purification by crystallization is a better technique as compared to evaporation by dryness. Some solids like sugar decompose or get charred in evaporation to dryness. Also impurities are not removed in this method. However, all these drawbacks are overcome in crystallization.

Multiple choice chemistry separation of matter crystals and crystallisation filtration and crystallisation other methods of separation

What would you observe when a saturated solution of potassium chloride prepared at $60^0 C$ is allowed to cool to room temperature?

  1. Crystallization happens

  2. Evaporation happens

  3. Sublimation happens

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

Here crystallization happens and solid potassium chloride will separate out. (Crystallization is a chemical solid-liquid separation technique, in which mass transfer of a solute from the liquid solution to a pure solid crystalline phase occurs)