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 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. 

Multiple choice fluid dynamics option b: engineering physics physics

Hot syrup flows faster because:

  1. Surface tension increases when temperature is increased.

  2. Viscosity decreases when temperature is increased.

  3. Viscosity increases when temperature is increased.

  4. Surface tension decreases when temperature is increased.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Hot syrup is liquid at higher temperature. We know that as temperature increases viscosity decreases for liquids. So, hot syrup flows faster as viscosity decreases.

Multiple choice fluid dynamics option b: engineering physics physics

With increase in temperature, the viscosity of:

  1. gases decreases and liquid increases

  2. gases increases and liquid decreases

  3. both gases and liquid increases

  4. both gases and liquid decreases
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The viscosity of liquid is inversely proporional to the square of the temperature, therefore as we increase the temperature, the viscosity of liquids will decrease.


Similarly, the viscosity of gases is linearly proportional to the temperature. hence as the temperature increases, the viscosity will increase

Multiple choice fluid dynamics option b: engineering physics physics

A good lubricant should be highly

  1. viscous and velocity

  2. non-viscous volatile

  3. viscous and non-volatile

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

A good lubricant generally possesses the following characteristics: A high boiling point and low freezing point (in order to stay liquid within a wide range of temperatures) A high viscosity index. Thermal stability.

Multiple choice fluid dynamics option b: engineering physics physics

More viscous oil is used in summer than in winter in motors due to

  1. rise in temperature in summer, the viscosity of oil increases.

  2. rise in temperature in summer, the viscosity of oil decreases.

  3. surface tension of oil decreases.

  4. surface tension of oil increases.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Due to rise in temperature viscosity of oil decreases in summers. So more viscous oils are used for better lubricant protection.