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 measurement and data processing and analysis spectroscopic identification of organic compounds materials science introduction superconducting metals and x-ray crystallography

When does a precipitate form?

  1. When something is insoluble in solution.

  2. When something is soluble in solution.

  3. When too much of a substance is added to solution.

  4. Whenever a solid is added to solution.

  5. Whenever liquid is added to a solution.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When too much of a substance is added to solution, a precipitate forms.
Also, when ionic product exceeds solubility product, the precipitation occurs.
In a supersaturated solution, the excess ions recombine to form solid which results in precipitation.

Multiple choice physics heat - measurement application of various thermometric scales different types of thermometers measuring temperature introduction to temperature

Mercury is commonly used as a thermometric fluid rather than water because

  1. specific heat of mercury is less than water

  2. specific heat of mercury is more than water

  3. mercury has greater visibility than water

  4. density of mercury is more than the water
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Mercury is commonly used as a thermometric fluid rather than water because mercury has greater visibility than water
Mercury has high melting and boiling points making it a liquid over a broad range of temperature.
Since it is a metal, it has a stable coefficient of expansion hence it expands uniformly and noticeably for a slight change of temperature.
Mercury is a non sticky viscous metal and hence it makes a clear meniscus, helpful in readings.
Mercury will not expand when it solidifies hence it doesn’t break the glass tube of the thermometer.
Multiple choice physics heat - measurement application of various thermometric scales different types of thermometers measuring temperature introduction to temperature

Compared to other liquids, why is mercury preferred as a barometric fluid?

  1. Height of mercury barometer is smaller so it is more convenient to handle

  2. Mercury does not stick to the glass surface of barometric tube

  3. Mercury shines so it is easier to take the observations

  4. Coefficient of expansion of mercury is less than other liquids
Reveal answer Fill a bubble to check yourself
A,B Correct answer
Multiple choice chemistry rain: where does it come from sources of water and water cycle availability and forms of water the water cycle

Evaporation is defined as:

  1. conversion of ice in water.

  2. conversion of water into water vapours.

  3. conversion of water vapours into the water.

  4. freezing of water into ice.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When water is heated it absorbs energy and changes its state from liquid (water) to gas(water vapours). This process of converting water in vapours is known as vaporisation.

Multiple choice physics bharat and science scope and progress of physics recent advancement in medical technology contribution of physics in technology and society

Which among the following has the strongest intermolecular force between their molecules?

  1. Milk

  2. Water

  3. Sodium chloride

  4. Air

  5. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Intermolecular forces: water has hydrogen bonding (strongest), milk contains water and other components with weaker overall forces, sodium chloride is ionic solid (not about intermolecular forces between molecules in liquid/gas state), air has very weak London dispersion forces. Water's extensive hydrogen bonding network gives it the strongest intermolecular forces among the options.

Multiple choice hydrogen ion scale or the ph scale inorganic analysis chemical analysis and investigation practical work chemistry

What is litmus?

  1. Water soluble mixture of different dyes.

  2. Mixture of metal and non-metal ions.
  3. Both $A$ and $B$

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Litmus is a water-soluble mixture of different dyes extracted from lichens. It is often absorbed onto filter paper to produce one of the oldest forms of pH indicator, used to test materials for acidity. Wet litmus paper can also be used to test for water-soluble gases that affect acidity or alkalinity; the gas dissolves in the water and the resulting solution colors the litmus paper. For instance, ammonia gas, which is alkaline, colors the red litmus paper blue.

Multiple choice hunger and dehydration from tasting to digestion digestion of food digestion evs

Dehydration occurs when _______ exceeds _________

  1. Face water intake, face water loss

  2. Face water loss, face water intake

  3. Body water content, face water loss

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

Dehydration refers to a deficit of total body water, with an accompanying disruption of metabolic processes. It results from the loss of water and important electrolytes from the body, including potassium, sodium, chloride and many other minerals. It occurs when face water loss exceeds face water intake. To prevent dehydration, one has to drink plenty of fluids and eat foods high in water such as fruits and vegetables. There are other preventive measures as well which includes avoid alcohol and caffeinated beverages, they increase dehydration. Wear light colored, absorbent, loose fitting clothing. Stay in cool, shades areas when possible, protect your skin with sun block. It can be treated with the help of using an oral rehydration solution which are easily available in chemists shops. 

Therefore, the correct answer is option B.

Multiple choice hunger and dehydration from tasting to digestion digestion of food digestion evs

In minor dehydration, which of the following can be helpful?

  1. Sea water

  2. Ethanol

  3. Fresh water

  4. Any water can be helpful
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Dehydration refers to a deficit of total body water, with an accompanying disruption of metabolic processes. It results from the loss of water and important electrolytes from the body, including potassium, sodium, chloride and many other minerals. To prevent dehydration, one has to drink plenty of fluids and eat foods high in water such as fruits and vegetables. There are other preventive measures as well which includes avoid alcohol and caffeinated beverages, they increase dehydration. Wear light colored, absorbent, loose fitting clothing. Stay in cool, shades areas when possible, protect your skin with sun block. It can be treated with the help of using an oral rehydration solution which are easily available in chemists shops. Minor rehydration can be treated easily by drinking fresh water. 

Therefore, the correct answer is option C.

Multiple choice fluid dynamics option b: engineering physics physics

A good lubricant must have:

  1. high viscosity

  2. low viscosity

  3. high density

  4. low surface tension
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Good lubricant must have high viscosity. So, that machine parts can do work better. Higher the viscosity of the lubricants the greater is its ability to provide boundary lubrication, which means a boundary between moving parts.