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 evs look, learn and experience brief introduction to atoms of elements elements and atoms introduction of atom

The state or phase of a given set of matter can change depending on _____________.

  1. temperature

  2. pressure

  3. Both a and b

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

The state or phase of a given set of matter can change depending on pressure and temperature conditions, transitioning to other phases as these conditions change to favor their existence; for example, solid transitions to liquid with an increase in temperature. Near absolute zero, a substance exists as a solid.

Multiple choice evs look, learn and experience brief introduction to atoms of elements elements and atoms introduction of atom

We have four substances P,Q,R,S. Substance P is dark coloured violet solid having diatomic molecules. Solution of P in alcohol is an Antiseptic 'T' Substance 'Q'is a white solid usually recovered from sea on a large scale. Substance 'R' is also a white solid insoluble in water and used in the form of small balls for safe storage of woolen clothes. Substance 'S' is a white solid too used in dry cell. P,Q,R,S,T, may be -(choose correct option)

  1. P-lodine, Q-Napthalene,R-$\displaystyle R-NH _{4}CI$ S-Nacl, T-lodine tincture
  2. P-NaCl,Q-Napthalene, $\displaystyle R-NH _{4}CI$

    S-lodine, T-lodine tincture
  3. P-lodine tincture, Q-$\displaystyle R-NH _{4}CI$ R- lodine, S-Napthalene, T-NaCl
  4. P-lodine, Q-Nacl, R- Napthalene,

    S-$\displaystyle R-NH _{4}CI$, T-lodine tincture
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

P = lodine $\displaystyle 1 _{2}$, dark coloured  violet solid Q = NaCl, recovered  from sea on large scale. R = Nephathalene, used in the from of small balls for safe storage of woolen clothes S = $\displaystyle NH _{4}Cl$, used in dry cells
T = TIncture iodine, a solution of iodine in alcohol as antiseptic 

Multiple choice botany breath and blood of life stomata and transpiration transport in organisms long distance transport of water different types of circulatory systems

Silicon emulsions are

  1. Antitranspirants

  2. Antirespirants

  3. Hormones

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

Antitranspirants are substances that are applied to the leaves to reduce transpiration. They are used on trees, cut flowers and shrubs. They reduces transpiration in fruit plants like apples, pears, orange, crop plants like cotton, tea, roses, tuber crops like potato, carrot and vegetable plants like chillies, tomato, cabbage. These are also used to protect plants from drying out too quickly. Various antitranspirants include abscisic acid (ABA), aspirin, silicon emulsions, plastics, waxes.

Thus, the correct answer is option A.

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

Water is better thermometric liquid

  1. True

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

The above statement is false.

Water can't be used as thermometric liquid as:
(i) It sticks to the glass
(ii) It is transparent, and hence difficult to read its level through 
(iii) It is volatile and hence vapors apply pressure on the surface thereby affecting reading
(iv) It is a poor conductor of heat.
(v) its expansion is not uniform.
(vi) It freezes at 0°C and boils at 100°C and hence range is not very wide.

Multiple choice chemistry substances in common use percent composition water of crystallisation percentage composition and empirical formula

The water of crystallisation is the fixed number of _________ molecules in one formula unit of salt.

  1. hydrogen

  2. water

  3. oxygen

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

Water of crystallisation are water molecules that form an essential part of the crystal structure of some compounds.

It is the fixed number of water molecules in one formula unit of salt.
For example Glauber's salt has 10 water of crystallisation and it's formula is $Na _2SO _4.10H _2O$.
Hence, the correct answer is option (B).

Multiple choice chemistry substances in common use percent composition water of crystallisation percentage composition and empirical formula

Water of crystallisation is responsible for ......... of the crystals.

  1. geometric shape and colour

  2. colour

  3. geometric shape

  4. number of crystal
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Water of crystallisation are water molecules that form an essential part of the crystal structure of some compounds.

Thus, the water of crystallisation is responsible for the geometric shape and colour of the crystals.
For example, Glauber's salt (Sodium sulphate decahydrate) $Na _2SO _4.10H _2O$ has ten water of crystallisation and it is responsible for the colourless monoclinic geometry of the crystals.
Hence, the correct answer option is (A).

Multiple choice chemistry substances in common use percent composition water of crystallisation percentage composition and empirical formula

Water of crystallization is the fixed number of water molecules chemically attached to a unit of a salt in its crystalline form.

  1. True

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

Water of crystallization means the number of water molecules present in one formula unit of a salt.
For example: $CaSO _4.2H _2O$ is called calcium sulphate dihydrate with and it has $2$ molecules of water of crystallization.

Multiple choice chemistry substances in common use percent composition water of crystallisation percentage composition and empirical formula

The definite number of water molecules which enters into a chemical combination with the substance when the substance is crystallized from its hot saturated solution is called ________. 

  1. crystallization

  2. water of crystallization

  3. formation of water molecule

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

The definite number of water molecules which enters into a chemical combination with the substance when the substance is crystallized from its hot saturated solution is called water of crystallization.

Multiple choice chemistry substances in common use percent composition water of crystallisation percentage composition and empirical formula

Water of crystallization is present in a definite :

  1. shape

  2. ratio

  3. volume

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

Water of crystallization or water of hydration or crystallization water is water that occurs inside crystals. Water is often necessary for the formation of crystals. Water of crystallization is the total weight of water in a substance at a given temperature and is mostly present in a definite (stoichiometric) ratio.

Multiple choice chemistry introduction to analytical chemistry percent composition water of crystallisation percentage composition and empirical formula

What is % composition of a substance?

  1. Sum of all the components.

  2. % composition of the sum of two components.

  3. % of the total mass of a substance.

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

The percent composition of a component in a compound is the percent of the total mass of the compound that is due to that component.

Multiple choice evs sources of water water resources and conservation receding water table water conservation and irrigation importance of water water: a precious resource

What is structure of water?

  1. Bihedral

  2. Trihedral

  3. Tetrahedral Arrangement

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

In a water molecule (H2O), the oxygen atom is sp3 hybridized, resulting in a tetrahedral arrangement of electron pairs, with the two hydrogen atoms occupying two of the corners.

Multiple choice evs sources of water water resources and conservation receding water table water conservation and irrigation importance of water water: a precious resource

Water is listed as one of the basic

  1. Solid forms of matter

  2. Nutrients of cool-aid

  3. Needs of animal and plant life

  4. Unit of life
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Water is essential for all living beings (human, animal and plant) for various
metabolic reactions. They gain water not on;y through the action of drinking but also from the food they eat.