Science - Class 9
Science - Class 9
Topic outline
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NCERT Solutions for Class 9 Science- Matter in Our Surroundings (Chemistry), NCERT Textbook Solutions for Class 9 Science, NCERT Solutions For Class 9 Chemistry, Matter in Our Surroundings - Class 9th NCERT Solutions Science, NCERT Solutions For Class 9 Chemistry Science Chapter 1 - Matter in Our Surroundings, Science - Chemistry - Class 9 (CBSE/NCERT) - Chapter 1 – Matter in Our Surroundings – Questions and Answers/Notes/Worksheets Tags: CBSE Class 9 - Chemistry – Chapter 1 - Matter in Our Surroundings Practice Pages, Extra Question and Answer based on NCERT for Class 9th, Science Chemistry, CBSE Grade IX free Worksheets PDF Matter in Our Surroundings, Science Question bank on Matter in Our Surroundings for ninth standard, Matter in Our Surroundings class 9 questions answers, State any two characteristic properties of a solid. What are the main characteristics of a solid? What are the characteristics of solids? Draw a labelled diagram to show interconversion of the three states of matter. Draw a labeled diagram of the experimental set-up to study the latent heat of fusion of ice. Draw a labeled diagram of the experimental set-up to study the latent heat of vaporization of water. Draw a labeled diagram of the experimental set-up to demonstrate the sublimation of ammonium chloride. Give reason for the following observations. (a) Naphthalene balls disappear with time without leaving any solid. (b) We can get the smell of perfume sitting several metres away. Name A,B,C,D,E and F in the following diagram showing change in its state?
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Matter in Our Surroundings
Q92. State any two characteristic properties of a solid.
Or
What are the main characteristics of a solid?
Or
What are the characteristics of solids?Ans. Characteristics of solids
a. Solids have a definite shape, distinct boundaries and fixed volumes, that is, have negligible compressibility.
b. Solids have a tendency to maintain their shape when subjected to outside force.
c. Solids may break under force but it is difficult to change their shape, so they are rigid.
Q93. Draw a labelled diagram to show interconversion of the three states of matter.
Ans.
Image from NCERT
Q94. Draw a labeled diagram of the experimental set-up to study the latent heat of fusion of ice.
Ans.
Image from NCERT
Q95. Draw a labeled diagram of the experimental set-up to study the latent heat of vaporization of water.
Ans.
Image from NCERT
Q96. Draw a labeled diagram of the experimental set-up to demonstrate the sublimation of ammonium chloride.
Ans.
Image from NCERT
Q97. Complete the table.
Quantity
Unit
Symbol
Temperature
kelvin
K
Length
metre
m
Mass
kilogram
kg
Weight
newton
N
Volume
cubic metre
m3
Density
kilogram per cubic metre
kg m–3
Pressure
pascal
Pa
Q98. Give reason for the following observations.
(a) Naphthalene balls disappear with time without leaving any solid.
(b) We can get the smell of perfume sitting several metres away.Ans. (a) Naphthalene balls disappear with time without leaving any solid because naphthalene balls undergo sublimation i.e. change of state directly from solid to gas without changing into liquid state (or vice versa). Naphthalene balls keep on forming naphthalene vapours slowly which disappear into the air.
(b) We can get the smell of perfume sitting several metres away due to diffusion of perfume vapours into air. The liquid perfume quickly changes into vapours. The perfume vapours move very rapidly in all directions in air, mix with the air particles and hence spread with air easily.
Q99. Name A,B,C,D,E and F in the following diagram showing change in its state?
Image from NCERT
Ans. A – Melting or Fusion
B - Vaporisation
C - Condensation
D - Solidification
E - Sublimation
F - Sublimation
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