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 biology movement in and out of the cell diffusion across cells diffusion and osmosis inter cellular movement

Diffusion occurs in
(a) Solids
(b) Liquids
(c) Gases

  1. a,b

  2. b,c

  3. a,c

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

Diffusion occurs in both liquids and gases and can take place over long distances diffusion in gases are much faster than in liquids the diffusion rate of oxygen in the air is 1,00,0001,00,000 times more than diffusion rate of oxygen in the water. Diffusion may be defined as the process of movement of gases. Liquids or solutes from the region of higher concentration to the regions of lower concentration till the molecules are uniformly distributed throughout the available space. Many substances like gases. liquids or solutes can diffuse simultaneously in different directions and at different rates in the same place without interfering with each other.

So, the correct answer is B.

Multiple choice dyes dyes and pigments chemistry in daily life applied chemistry chemistry

If a solid is dispersed in a liquid, the colloid is known as:

  1. gel

  2. sol

  3. emulsion

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

Sol is a colloidal suspension with solid particles as dispersed phase dissolve in a liquid i.e dispersion medium.

Gel are a dispersion of molecules of a liquid within a solid in which liquid particles are dispersed in the solid medium.
An emulsion is a mixture of two or more liquids that are normally immiscible.
Hence answer is option B

Multiple choice dyes dyes and pigments chemistry in daily life applied chemistry chemistry

Adsorption is multilayer in case of:

  1. physical adsorption

  2. chemisorption

  3. both

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

Adsorption is multilayer in case of physical adsorption. However, in the case of chemisorption, the absorption is unilayer as it involves the formation of a chemical bond between adsorbate and adsorbent molecules.


Hence, option A is correct.

Multiple choice dyes dyes and pigments chemistry in daily life applied chemistry chemistry

When soap or detergent is added to water, which of the following is true?

  1. This results in formation of oil in water type emulsion.

  2. This results in formation of water in oil type emulsion.

  3. This results in formation of either oil in water type emulsion or water in oil type emulsion.

  4. No emulsion is formed.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

When soap or detergent is added to water, this results in the formation of oil in water type emulsion.
The polar water-soluble ( hydrophilic) head is on the surface of the micelle whereas non-polar oil soluble (hydrophobic) tail is in the centre of the micelle. In the centre of the micelle, small oil droplets are present in which hydrophobic part of micelle dissolves.

Multiple choice chemistry solid state classification of crystalline solids classification of solids introduction to solids
Statement: The melting point of all substances decreases with pressure increase.

State whether the given statement is true or false.

  1. True

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

Melting point increases with increase in pressure. This is because , due to increased pressure molecules tend to remain in solid state. (This is the basic principle on which liquification of gas works)


Hence, the given statement is $false$.

Multiple choice evs sources of water the lithosphere and the hydrosphere first aid safety and first aid

All of the following are the properties of water except ____________.

  1. Hydrophilic properties

  2. Hydrophobic properties

  3. Very good solvent

  4. Density as a solid is less than that as a liquid

  5. Strong surface tension
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Water is a polar molecule, making it hydrophilic and a good solvent. It also exhibits high surface tension. Hydrophobic properties are characteristic of non-polar substances, not water.

Multiple choice evs sources of water the lithosphere and the hydrosphere first aid safety and first aid

Which of the following are included in hydrosphere?

  1. Liquid and frozen surface waters

  2. Groundwater held in soil and rock

  3. Atmospheric water vapor

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

The hydrosphere is the total amount of water present on the planet which includes the surface water, underground water and in the air (Atmosphere) as water vapor. Hydrosphere can be liquid, ice or vapor. 

So the correct option is 'all of the above'.

Multiple choice evs - i sources of water the lithosphere and the hydrosphere first aid safety and first aid

During water cycle, the water undergoes .......... phase.

  1. Ice

  2. Liquid

  3. Gas

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

  • The hydrological cycle is a prominent method to rejuvenate freshwater resources.
  • It involves the evaporation of water into water vapor by the heat of the sun which further condenses into tiny water droplets that fall on the earth as rain. This continuous recycling of water leads to the recharging of water resources.
  • It includes the interconversion of different states of water. The ice present in the glaciers melts due to the overheating of the earth and enters the hydrological cycle.

So, the correct answer is option D.

Multiple choice bio-chemistry proteins denaturation of protein proteins and amino acids proteins and enzymes

When liquids are heated, they turn into gases. The yellow egg yolk present inside the egg is a liquid but when it is heated, it changes into an omelet, which is solid. Why?

  1. Sometimes, liquids turn into solids

  2. Omelet does not follow the above rule

  3. Strictly speaking, the rule does not apply to complex mixtures and egg yolk is a complex mixture

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

The egg still contains more water than protein, but the water is now dispersed in the protein web so it can no longer flow together, turning the liquid egg into a semi-solid. This happens at around $145^{o}F$ for egg white and $150^{o}F$ for egg yolk. Continued heating causes more bonds to form, leaving less space for the water, that's why after heating the yolk converts in solid omelet.

Multiple choice

Which of the following is an example of a chemical change?

  1. Melting of ice

  2. Breaking a glass

  3. Burning of wood

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

Burning wood is a chemical change because it involves a reaction with oxygen to form new substances like ash and carbon dioxide. Melting, breaking, and crushing are physical changes.

Multiple choice

Which of the following is NOT a common type of emulsion used in molecular gastronomy?

  1. Oil-in-water emulsion

  2. Water-in-oil emulsion

  3. Solid emulsion

  4. Gas-in-liquid emulsion
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Solid emulsion is not a type of emulsion that is typically used in molecular gastronomy. Emulsions in molecular gastronomy are typically either oil-in-water, water-in-oil, or gas-in-liquid.

Multiple choice

The cavitation phenomenon in fluid flow occurs when:

  1. Pressure in the fluid drops below its vapor pressure.

  2. Temperature in the fluid rises above its boiling point.

  3. Velocity of the fluid increases beyond a critical value.

  4. Density of the fluid decreases below a critical value.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cavitation occurs when the pressure in a fluid drops below its vapor pressure, causing the liquid to vaporize and form bubbles.