NCERT Exemplar Class 9 Science Chapter 2 - Is Matter Around Us PureShare
NCERT Exemplar Class 9 Science Chapter 2 - Is Matter Around Us Pure
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.
Two substances, A and B were made to react to form a third substance, A2B according to the following reaction
2 A + B → A2B
Which of the following statements concerning this reaction are incorrect?
(i) The product A2B shows the properties of substances A and B.
(ii) The product will always have a fixed composition.
(iii) The product so formed cannot be classified as a compound.
(iv) The product so formed is an element.
Two chemical species X and Y combine together to form a product P which contains both X and Y
X + Y → P
X and Y cannot be broken down into simpler substances by simple chemical reactions. Which of the following concerning the species X, Y and P are correct?
(i) P is a compound.
(ii) X and Y are compounds.
(iii) X and Y are elements.
(iv) P has a fixed composition.
|Chapter 1 - Matter in Our Surroundings|
|Chapter 2 - Is Matter Around Us Pure|
|Chapter 3 - Atoms and Molecules|
|Chapter 4 - Structure of The Atom|
|Chapter 5 - The Fundamental Unit of Life|
|Chapter 6 - Tissues|
|Chapter 7 - Diversity in Living Organisms|
|Chapter 8 - Motion|
|Chapter 9 - Force and Laws of Motion|
|Chapter 10 - Gravitation|
|Chapter 11 - Work and Energy|
|Chapter 12 - Sound|
|Chapter 13 - Why Do We Fall Ill|
|Chapter 14 - Natural Resources|
|Chapter 15 - Improvement in Food Resources|