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 botany plant water relation active transport and passive transport types of plant transport atp

Diffusion in gases are _____ than in liquids.

  1. Slower

  2. Faster

  3. Equal

  4. None of these
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 air is $1,00,000$ times more than diffusion rate of oxygen in water.

Multiple choice physics thermal physics heat and heat transfer transfer of heat fundamentals of heat transfer

A person takes hot tea by pouring it into the saucer (plate) when one is in a hurry because he knows that

  1. The latent heat of steam is high and the tea will become cold quickly

  2. The evaporation increases with the increase in surface area and cooling of tea is faster

  3. Part of heat will be absorbed by the saucer (plate) and the tea will become cold quickly

  4. The high specific heat of water makes the tea cold quickly
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Evaporation is a surface phenomenon. By pouring tea into a saucer, the surface area exposed to the air increases, which significantly accelerates the rate of evaporation and consequently cools the liquid faster.

Multiple choice physics measurement and effects of heat heat exchange calorimeter measuring thermal quantities by the method of mixtures

A thermos bottle containing coffee is vigorously shaken. If the coffee is considered as a system, then the temperature of the coffee will 

  1. increase slightly

  2. fall

  3. remain the same

  4. never be determined
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
A thermoflask is closed system, so no heat energy added to system i.e. $\triangle \theta=0$
Work is done on the system by shaking it against viscous force. Hence $\triangle w=-ve$
Internal energy, $\triangle U=\triangle \theta - \triangle w=0-(-\triangle w) \\ \Rightarrow \triangle U=+\triangle w$
$\because \triangle U\; is\; +ve$ So there is increase in temperature due to rise in internal enrgy.
Multiple choice physics measurement and effects of heat heat exchange calorimeter measuring thermal quantities by the method of mixtures

Heat is added to a block of ice of mass $m$ until the entire block melts into liquid water. Identify by which of the following method this can be explained ?

  1. First law of thermodynamics (conservation of energy)

  2. Second law of thermodynamics (law of entropy)

  3. Ideal gas law

  4. Heat of fusion and heat of vaporization equation

  5. Heat engine efficiency
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

When heat is added to ice at $0^{\circ}C$, the temperature of the ice does not change. However the heat goes into the latent heat of fusion of ice, This is a kind of potential energy that water owns in form of latent heat.

Hence correct answer is option D.

Multiple choice chemistry nature of matter heterogeneous mixture - suspension and its properties suspension types of mixture

Suspension is a non-homogeneous mixture in which very fine particles of .................. are dispersed in .................

  1. solid/liquid, gas/solid

  2. gas, liquid

  3. solid, liquid/gas

  4. solid/liquid/gas, liquid
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A suspension is a heterogeneous mixture in which very fine particles of a solid dispersed in any medium (liquid/gas). In any suspension, fine particles of the solid remain suspended in the medium.

Multiple choice chemistry nature of matter heterogeneous mixture - suspension and its properties suspension types of mixture

Muddy pond water and smoke is an example of a:

  1. colloid

  2. suspension

  3. true solution

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

A suspension is a heterogeneous mixture in which very fine particles (about 10-5m in size) of solid are dispersed in any medium (liquid or gas). In suspension, the solute particles are visible to the naked eye, and remain suspended throughout the bulk of the medium. The Tyndall effect is observed in this mixture.

Muddy pond water, smoke coming out of a chimney, chalk-water mixture, coarse lime particles in water are examples of suspension.

Multiple choice chemistry nature of matter heterogeneous mixture - suspension and its properties suspension types of mixture

A suspension of liquid droplets or fine solid particles in a gas is called :

  1. aerosol

  2. particulate

  3. both a and b

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

A suspension of liquid droplets or fine solid particles in a gas is called an aerosol or particulate. In the atmosphere these consist of fine dust and soot particles, sea salt, biogenic and volcanogenic sulfates, nitrates, and cloud droplets.

Multiple choice chemistry nature of matter heterogeneous mixture - suspension and its properties suspension types of mixture

Which of the following is an example of suspension?

  1. Milk

  2. Water

  3. Sand in water

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

A key characteristic of a suspension is that the solid particles will settle and separate over time if left alone. An example of a suspension is a mixture of water and sand. When mixed up, the sand will disperse throughout the water. If left alone, the sand will settle to the bottom.