Science Exemplar
Class 9
NCERT Exemplar
1
Chapter 1: Matter in Our Surroundings
22 questions
2
Chapter 2: Is Matter Around Us Pure?
35 questions
Q1
Question 1:
Which of the following statements are true for pure substances?
(i) Pure substances contain only one kind of particles
(ii) Pure substances may be compounds or mixtures
(iii) Pure substances have the same composition throughout
(iv) Pure substances can be exemplified by all elements other than nickel
(i) Pure substances contain only one kind of particles
(ii) Pure substances may be compounds or mixtures
(iii) Pure substances have the same composition throughout
(iv) Pure substances can be exemplified by all elements other than nickel
Q2
Question 2:
Rusting of an article made up of iron is called
(a) corrosion and it is a physical as well as chemical change
(b) dissolution and it is a physical change
(c) corrosion and it is a chemical change
(d) dissolution and it is a chemical change
View all question(a) corrosion and it is a physical as well as chemical change
(b) dissolution and it is a physical change
(c) corrosion and it is a chemical change
(d) dissolution and it is a chemical change
3
Chapter 3: Atoms and Molecules
45 questions
4
Chapter 4: Structure of the Atom
38 questions
5
Chapter 5: The Fundamental Unit of Life
51 questions
6
Chapter 6: Tissues
50 questions
7
Chapter 7: Diversity in Living Organisms
51 questions
8
Chapter 8: Motion
16 questions
9
Chapter 9: Force and Laws of Motion
18 questions
10
Chapter 10: Gravitation
26 questions
11
Chapter 11: Work and Energy
27 questions
12
Chapter 12: Sound
13 questions
13
Chapter 13: Why do We Fall Ill?
39 questions
14
Chapter 14: Natural Resourses
56 questions
15
Chapter 15: Improvement in Food Resources
47 questions
Question
Question 1:
Which of the following statements are true for pure substances?
(i) Pure substances contain only one kind of particles
(ii) Pure substances may be compounds or mixtures
(iii) Pure substances have the same composition throughout
(iv) Pure substances can be exemplified by all elements other than nickel
Views: 6,167 students
Text solution
Verified
Answer:
Pure substances contain only one kind of particle and they have the same composition throughout. Pure substances may be compounds but not mixtures. All elements and compounds are pure substances.
Hence, the correct answer is option (b).
Pure substances contain only one kind of particle and they have the same composition throughout. Pure substances may be compounds but not mixtures. All elements and compounds are pure substances.
Hence, the correct answer is option (b).
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Practice more questions from Science Exemplar (NCERT Exemplar)
Q1
Question 1:
Which of the following statements are true for pure substances?
(i) Pure substances contain only one kind of particles
(ii) Pure substances may be compounds or mixtures
(iii) Pure substances have the same composition throughout
(iv) Pure substances can be exemplified by all elements other than nickel
(i) Pure substances contain only one kind of particles
(ii) Pure substances may be compounds or mixtures
(iii) Pure substances have the same composition throughout
(iv) Pure substances can be exemplified by all elements other than nickel
Q2
Question 2:
Rusting of an article made up of iron is called
(a) corrosion and it is a physical as well as chemical change
(b) dissolution and it is a physical change
(c) corrosion and it is a chemical change
(d) dissolution and it is a chemical change
View all(a) corrosion and it is a physical as well as chemical change
(b) dissolution and it is a physical change
(c) corrosion and it is a chemical change
(d) dissolution and it is a chemical change
Practice questions from Science Exemplar (NCERT Exemplar)
Question 1
Views: 5,649
(a) Drying of a shirt in the sun.
(b) Rising of hot air over a radiator.
(c) Burning of kerosene in a lantern.
(d) Change in the colour of black tea on adding lemon juice to it.
(e) Churning of milk cream to get butter.
Question 2
Views: 5,978
(a) A volatile and a non-volatile component.
(b) Two volatile components with appreciable difference in boiling points.
(c) Two immiscible liquids.
(d) One of the components changes directly from solid to gaseous state.
(e) Two or more coloured constituents soluble in some solvent.
Question 3
Views: 6,003
(i) Decaying of wood
(ii) Burning of wood
(iii) Sawing of wood
(iv) Hammering of a nail into a piece of wood
Question 4
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| Question Text |
Question 1:
Which of the following statements are true for pure substances? (i) Pure substances contain only one kind of particles (ii) Pure substances may be compounds or mixtures (iii) Pure substances have the same composition throughout (iv) Pure substances can be exemplified by all elements other than nickel |
| Updated On | Oct 7, 2022 |
| Topic | Is Matter Around Us Pure? |
| Subject | Science |
| Class | Class 9 |
| Answer Type | Text solution:1 Video solution: 2 |
| Upvotes | 324 |
| Avg. Video Duration | 5 min |
