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 pure substances and mixtures: separation of mixtures difference between mixtures and compounds pure substance and mixtures types of pure substances

Which of the following is a characteristic property of both mixtures and compounds?

  1. Their properties are same as those of their components

  2. Energy is released when they are formed

  3. Their masses are equal to the sum of the masses of their components

  4. They contain the components in fixed proportions
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Mixture and a compound both follow the law of conservation of mass so their weight equals to the sum of mass of their components.

Multiple choice chemistry hydroxy compounds and ethers physical properties of phenol physical properties of alcohols and phenols organic compounds with functional group containing oxygen (part-1)

Alcohols of low molecular weight are:

  1. soluble in water

  2. soluble in water on heating

  3. insoluble in water

  4. insoluble in all solvents.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Alcohols of low molecular weight are soluble in water while that of high molecular weight are insoluble in water .because of high hydrogen bonding in low molecular weight Alcinous.

Multiple choice chemistry hydroxy compounds and ethers physical properties of phenol physical properties of alcohols and phenols organic compounds with functional group containing oxygen (part-1)

The compound which gets dissolved in water is :

  1. $C _{2}H _{6}$
  2. $C _{2}H _{4}$
  3. $C _{2}H _{2}$
  4. $C _{2}H _{5}OH$
  5. $C _{3}H _{8}$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Option D or Ethanol dissolves in water. 


Ethanol has electronegative oxygen atom in it, and hence it takes part in hydrogen bonding with water. 

Because of excessive hydrogen bonding with water, Ethanol dissolves in it.

Multiple choice chemistry hydroxy compounds and ethers physical properties of phenol physical properties of alcohols and phenols organic compounds with functional group containing oxygen (part-1)

Which of the following cannot be dissolved in alcohol?

  1. Dyes and drugs

  2. Soaps and varnishes

  3. Resins and varnishes

  4. Rubber and plastics
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Rubber and plastic cannot be dissloved in alchol because of nonpolar nature of rubber and plastics

Multiple choice chemistry hydroxy compounds and ethers physical properties of phenol physical properties of alcohols and phenols organic compounds with functional group containing oxygen (part-1)

Solubility of alcohols in water is _______ to that of hydrocarbons of comparable molecular masses.

  1. greater than

  2. similar

  3. lesser than

  4. none of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Since alcohols can participate in $H-$bonding while hydrocarbons cannot, alcohols are able to interact with water molecules more easily than hydrocarbons of comparable molecular masses. Hence alcohols possess greater solubility in water than hydrocarbons of comparable molecular masses.
Multiple choice chemistry hydroxy compounds and ethers physical properties of phenol physical properties of alcohols and phenols organic compounds with functional group containing oxygen (part-1)
Lower alcohols are more soluble in water than higher alcohols.

  1. True

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

Lower alcohols are more soluble in water than higher alcohols. With the increase in the molar mass, solubility decreases. In alcohols, $-OH$ group is polar and forms hydrogen bonds with water. This makes alcohol water soluble. The alkyl chain (hydrocarbon chain) is non-polar and decreases the solubility of alcohol in water.

Multiple choice chemistry hydroxy compounds and ethers physical properties of phenol physical properties of alcohols and phenols organic compounds with functional group containing oxygen (part-1)

Alcohols containing only up to ________________ carbon atoms are completely miscible with water.

  1. 10

  2. 3

  3. 8

  4. 14
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

 Alcohol-containing up to $3-$ carbon atoms are completely miscible with water in all proportions. This is due to the hydrogen bonding with water molecule. 

Multiple choice chemistry hydroxy compounds and ethers physical properties of phenol physical properties of alcohols and phenols organic compounds with functional group containing oxygen (part-1)

Alcohols containing only up to ___________ carbon atoms are completely miscible with water.

  1. three

  2. four

  3. five

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

Hydroxyl group makes the alcohol molecule polar and these are used as protic solvents. Two opposing solubility trends in alcohols are the tendency of the polar OH to promote solubility in water and the tendency of the carbon chain to resist it. So, methanol, ethanol, propanol are miscible in water as the OH group overcomes the short carbon chain.

Multiple choice chemistry hydroxy compounds and ethers physical properties of phenol physical properties of alcohols and phenols organic compounds with functional group containing oxygen (part-1)

Phenol is an organic compound even though it is soluble in water due to the presence of:

  1. ionic bonding

  2. covalent bonding

  3. hydrogen bonding

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

Phenol is an organic compound even though it is soluble in water due to the presence of hydrogen bonding. Phenol has hydroxyl group which is involved in the formation of hydrogen bonds with water. It increases the solubility.  Hydrogen bonding is possible when $H$ atom is attached to electronegative $N,\ O$ or $F$ atom.

Multiple choice evs nature of things objects that float or sink substances that sink or float soluble and insoluble substances

The following is the characteristic property of a substance:

  1. density

  2. volume

  3. weight

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

Density is a characteristic property because it does not change with the varying amount of the substance. No matter how big or small a piece of the substance you have, it will always be the same density because it is the same material.

Multiple choice evs nature of things objects that float or sink substances that sink or float soluble and insoluble substances

Take 2 glasses $A $ and $B$ and put tap water in $A$ and salt water in $B$. Now add 1 egg in each. In which of the glass, an egg will sink?

  1. $A$
  2. $B$

  3. Both

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

Salt water is denser than fresh water. So, if we put egg in salt water the egg floats and if we put egg in tap water the egg will sink.

Multiple choice evs nature of things objects that float or sink substances that sink or float soluble and insoluble substances

Which of the following substance is not transparent?

  1. Glass

  2. Pure Water

  3. Air

  4. Steel
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Transparent material:- Materials which allow light to completely pass through them without getting scattered are called Transparent material.

Example- a glass of water, clear metal-containing.
Steel does not allow to pass light through it hence is an opaque object.