Question

E: Heat
A: Solid
reactants
OBJECTIVE TYPE QUESTIONS
Matter
25 marks
0.1 Select the correct answer from A, B, C, D & E for each statement given below:
15)
B: Vaporization C: Ion D: Gases
1. An atom or group of atoms
having a resultant charge.
2. The state of matter which has
least density & no free surfaces.
3. In Landoll's experiment the form in which the chemical energy stored up in the
is released.
4. The process of change of a liquid into vapour (gas) on heating.
5. The state of matter, where the inter-particle attraction between particles is maximum
0.2 With reference to the liquid state of matter - answer the following:
[51
1. On heating the liquid, do the particles gain or lose energy.
2. The heat energy supplied to the liquid is absorbed by its molecule & stored as which
form of energy
3. How does the stored energy, have effect on inter-particle space.
4. State why the inter-particle attraction decreases to negligible.
5. At what point will the particles become free and escape as gas,
0.3 Complete the statements by filling the blanks with the correct word from the bracket. [5]
1. In naphthalene, the inter-particle attraction is
[high/low]
2. The law of conservation of mass, is strictly valid if mass and
(energy/volume) are considered together.
3. When inter-particle space increases, the inter-particle attractive force (decreases/increases).
4. Kinetic energy of molecules in helium is
[large/very large compared
to the kinetic energy of molecules in water.
5. Conversion of vapour (or gas) into a liquid is termed [liquefaction/vaporization).
Q.4 Give reasons for the following:
[5]
1. Particles of matter possess energy called kinetic energy.
2. Solids cannot be compressed, but gases are highly compressible.
3. Kinetic energy of molecules of gases is very large & of solids, the least.
4. On heating a sublimable solid, the molecules break free & escape from surface of the
solid directly into vapour.
5. Particles of matter move more rapidly on application of heat.
2.5 Complete the blanks with reference to interconversion of matter on basis of kinetic theory-
with the word 'increases', 'decreases', 'gain', 'lose' or 'overcome in each case.
[51
1. During melting of solids, the inter-particle space
2. During vaporization, the liquid particles
energy
3. During liquefaction, the particles
energy
4. During solidification, the inter-particle space
5. During sublimation the inter-particle attraction is​

Answer 1

Answer:

during liquefaction the particles energy

Answer 2

omg

Explanation:

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