Data Loading...
chemistry_ Matter and Its Composition - A Plus Topper Flipbook PDF
chemistry_ Matter and Its Composition - A Plus Topper
157 Views
128 Downloads
FLIP PDF 2.39MB
RS AGGARWAL SOLUTIONS
ICSE Previous Year Papers 2019 CLICK NOW ML AGGARWAL SOLUTIONS ICSE SOLUTIONS SELINA SOLUTIONS
ISC & ICSE SPECIMEN PAPERS 2019
CBSE SAMPLE PAPERS
HSS LIVE MODEL PAPERS
EXAMS
New Simpli ed Chemistry Class 7 ICSE Solutions – Matter and Its Composition July 3, 2018 by Kalyan — 1 Comment
New Simpli ed Chemistry Class 7 ICSE Solutions – Matter and Its Composition ICSE Solutions
Selina ICSE Solutions
ML Aggarwal Solutions
Start Now Start Converting Here
Ad
From DOC To PDF
Learn more Simpli ed Chemistry
Chemistry
Physics
Points to Remember: 1. Matter has mass and occupies space.
Biology
Maths
Geography
History & Civics
2. Matter is made up of atoms and molecules.
ICSE Previous Year Papers 2019 CLICK NOW ML AGGARWAL SOLUTIONS RS AGGARWAL SOLUTIONS ICSE SELINA SOLUTIONS 3. Atoms are the smallest particles ofSOLUTIONS matter which may or may not have independent existence. 4. 4. Molecules are capable of independent existence. They are 5. made of atomsPAPERS of same2019 kind or different kinds. ISC & ICSEup SPECIMEN 6. The atoms and molecules are in random motion. 7. There are gaps between the molecules of matter called as intermolecular space. 8. There exists a force of attraction between the molecules 9. known as intermolecular force of attraction. 10. Matter exists in three states : solids, liquid and gas. 11. Matter can change from one state to another on changing temperature and pressure. 12. The change of state of a matter from one form into another I is called inter conversion of states of matter. EXERCISE Question 1. Explain the meaning of the term matter with special reference to the term ‘substance’. Answer: Matter is the basic substance of which all materials, living or non-living are made of. SEE ALSO 1
Exam Preparation Tips
5
Buy Study Material Online
2
Student Loan Repayment Options
6
Certification Courses Online
3
Data Analysis Masters Program
7
Affordable Online Universities
4
Business Management Courses Online
8
Online Graduate Degrees
Question 2. Name the three states of matter. On what basis are the three states classi ed. Answer: Three states of matter are: 1. Solid 2. Liquid 3. Gases Basis of the classi cation are: Physical properties like:
1. Mass RS AGGARWAL SOLUTIONS 2. Volume
ICSE Previous Year Papers 2019 CLICK NOW ML AGGARWAL SOLUTIONS ICSE SOLUTIONS SELINA SOLUTIONS
3. Shape 4. Rigidity ISC & ICSE SPECIMEN PAPERS 2019 5. Density 6. Arrangement of particles. Question 3. Each of the three states of matter has mass. Explain with the help simple experiments – that each state of matter has mass. Answer: Matter i.e. solids, liquids and Gases have mass explained by the following experiments. (1) Solid Experiment: A solid placed on one side of the scale, causes the scale to tilt towards one side. Conclusion: The scale tilts due to the mass of the solid, hence all solids have mass.
(2) Liquid: Experiment: A liquid placed on one side of the scale, causes the scale to tilt towards one side. Conclusion: The scale tilts due to the mass of the liquid, hence all liquids have mass.
Start Download - View PDF Convert From Doc to PDF, PDF to Doc Simply With The Free Online App! Ad
Ad
FromDocToPDF
Learn more (3) Gas: Experiment: An in ated balloon placed on one side of the scale causes it to tilt towards one side.
Conclusion: The scale tilts due to the mass of the gas, hence all gases have mass. ICSE Previous Year Papers 2019 CLICK NOW ML AGGARWAL SOLUTIONS RS AGGARWAL SOLUTIONS ICSE SOLUTIONS SELINA SOLUTIONS
ISC & ICSE SPECIMEN PAPERS 2019
Question 4. A measuring cylinder is lled with water to a particular mark. A piece of solid is immersed inside the measuring cylinder. State why the level of water in the measuring cylinder will rise up. If the solid is removed, what will be the new level of the water in the measuring cylinder. Give a reason for your answer. Answer: When a piece of solid stone is immersed inside the measuring cylinder. The water level rises up.
On removal of solid stone the water level in the measuring cylinder falls down back to the mark ‘A’.
Hence, It show that the stone occupies the space of the water and thus pushes the water level up. This experiment or procedure also proves that all solids occupy space. Question 5. A glass beaker is half lled with water and an empty glass tumbler is inverted & lowered inside the glass beaker. State your observations on tilting the tumbler below the level of the water in the glass beaker. Give a reason for your answer. Answer: (1) Take a glass beaker half- lled with water as shown in diagram.
RS AGGARWAL SOLUTIONS
ICSE Previous Year Papers 2019 CLICK NOW ML AGGARWAL SOLUTIONS ICSE SOLUTIONS SELINA SOLUTIONS
ISC & ICSE SPECIMEN PAPERS 2019
(2) Take an empty glass tumbler which contains air is inverted and lowered inside the glass beaker.
(3) On tilting the tumbler the air inside the tumbler is displaced and bubbles of air are seen coming out. The air is pushed out by the water on tilting the tumbler inside the beaker of water.This experiment or procedure also proves that air or gases occupy space
Question 6. Differentiate the general properties of solids, liquids and gases in the form of a table — with reference to (a) mass (b) space (c) volume (d) shape (e) compressibility (f) density (g) free surfaces (h) diffusion. Answer: (a) Solids— They have mass Liquid — They have mass Gases— They have mass
(b) RS AGGARWAL SOLUTIONS Solids— They Occupies space
ICSE Previous Year Papers 2019 CLICK NOW ML AGGARWAL SOLUTIONS ICSE SOLUTIONS SELINA SOLUTIONS
Liquid— They Occupies space Gases— TheySPECIMEN Occupies PAPERS space 2019 ISC & ICSE (c) Solids-They have a de nite volume Liquid-They have a de nite volume Gases-They have no de nite volume (d) Solids-They have a de nite shape Liquid-They have no shape Gases-They have no shape (e) Solids-They have a no compressibility Liquid-They have slight compressibility Gases-They have high compressibility (f) Solids-They have high density Liquid-They have less density Gases-They have least density (g) Solids-They have any number(of free surfaces) Liquid-They have one free surfaces Gases-They have no free surfaces (f) Solids-They have no diffusibility Liquid-They have slight diffusibility Gases-They have high proper diffusibility
Question 7. State in which of the three states of matter- (a) Are the atoms or particles far apart (b) The space between the particles is minimum.
(c) The force of attraction between the particles is very weak. ICSE Previous Year Papers 2019 CLICK NOW ML AGGARWAL SOLUTIONS AGGARWAL ICSE SOLUTIONS SELINA SOLUTIONS (d) RS The movementSOLUTIONS of the particles are neither about their own positions nor in any random direction. Answer: (a)ISC Gas (b) Solid (b) (c) Gas (c) (d) Gas & ICSE SPECIMEN PAPERS 2019 Question 8. Give a reason why – (a) Solids have a de nite volume & a de nite shape. (b) Liquids have a de nite volume but no de nite shape. (c) Gases have no de nite volume and no de nite shape. Answer: (a) Any matter that is a solid has a de nite shape and a de nite volume. The molecules in a solid are in xed positions and are dose together. Although the molecules can still vibrate, they cannot move from one part of the solid to another part. As a result, a solid does not easily change its shape or its volume. (b) Any matter that is a liquid has a de nite volume but no de nite shape. The molecules in a liquid are less closely packed and they have space between them as compared to solids. Although the molecules can easily move. The inter molecular forces of attraction between the particles are less strong as compared to solids. Hence liquid does have xed shape and takes the shape of the container in which it is placed e. It has de nite volume. (c) Any matter that is a gas has no de nite volume and no de nite shape. The molecules in a gas are least closely packed and inter molecular space between them is very large when compared to solids & liquids. The inter molecular force of attraction between the particles are negligible. As a result a liquid does not easily change its shape nor they have xed volume. Question 9. Particles of matter possess energy due to their random motion. Compare the particles in a solid, -liquid & in a gas with reference to the amount of kinetic energy possessed by each. Answer: Particles of matter possess energy due to random motion is called kinetic energy. Comparison of particles in a solid, liquid and gas with reference to kinetic energy are given in the following:
RS AGGARWAL SOLUTIONS
ICSE Previous Year Papers 2019 CLICK NOW ML AGGARWAL SOLUTIONS ICSE SOLUTIONS SELINA SOLUTIONS
Visit The Store Near You Now! ISC & ICSE SPECIMEN PAPERS 2019
Lenovo Exclusive Store - Sigma IT Super Store
Question 10. Describe simple experiments to show that – (a) particles of matter have inter molecular attraction (b) particles of matter are closely packed in solids and less in liquids. Answer: (a) Experiment – To show that particles off matter have inter molecular attraction
Procedure: 1. Globules of mercury are placed in a petri dish and kept at – a distance. 2. The petri dish is shaken slowly and the mercury globules come together forming a big globule. Conclusion — The above experiment concludes that a force of attraction exist between particles of matter. (b) Experiment – To show that particles are closely packed in solids and less in liquids
Procedure: 1. Take a measuring cylinder and add 100 ml. of water to it.
2. Add crystals of sugar [solid] to the water and stir carefully to obtain a sugar solution. ICSE Previous Year Papers 2019 CLICK NOW ML AGGARWAL SOLUTIONS ICSE SOLUTIONS SOLUTIONS 3. The volume of water after addition of sugar remainsSELINA the
RS AGGARWAL SOLUTIONS
same i.e. at the 100 ml. mark. ISC & ICSE SPECIMEN PAPERS 2019
Conclusion 1. Particles of a liquid [e.g. water] are less closely packed. 2. Particles of a solid [e.g. sugar] are closely packed. 3. The sugar particles ll the inter molecular spaces, which must be existing between the water molecules and hence the level of water in the measuring cylinder does not rise. Question 11. A crystal of iodine is placed in a closed at bottom ask and heated. State how you would conclude from the observations seen, that inter particle space is minimum in solids and maximum in gases. Answer: Procedure: 1. 40 A crystal of iodine is heated in a closed ask. The crystal containing ‘X’ no. of particles turns into vapours, which also contain ‘X’ no. of particles and lls the complete ask. Conclusion 1. Particles of a solid [e.g. crystal of iodine] are more closely packed. 2. Particles of a gas [e.g. vapours of iodine] are least closely packed and ll the ask completely.
Question 12. Explain the term ‘inter conversion of matter’ – with ice as a starting material. State the term which refers to the conversion of a substance on heating from. (a) solid state to liquid state (b) liquid state to vapour state (c) vapour state to liquid state (d) liquid state to solid state. Answer: The phenomenon of change from one state to the other and then back to the original state without any
change in its chemical composition is called ‘inter conversion of matter.’ ICSE Previous Year Papers 2019 CLICK NOW ML AGGARWAL SOLUTIONS AGGARWAL SOLUTIONS ICSE SOLUTIONS SOLUTIONS TheRSterms which refers to the conversion of a substance SELINA are: (a) Melting (b)ISC Vaporisation & ICSE SPECIMEN PAPERS 2019 (c) Liquefaction (d) Solidi cation Question 13. Give a reason why solids and liquids co-exist at their melting points. Answer: A substance exists in the solid state below its melting point and in the liquid state above its melting point. Hence, solids and liquids co-exist at their melting point.
Objective Type Questions Matter and its composition Question 1. Match the characteristics of the three states of matter in List I with their correct answer from List II.
Answer: RS AGGARWAL SOLUTIONS
ICSE Previous Year Papers 2019 CLICK NOW ML AGGARWAL SOLUTIONS ICSE SOLUTIONS SELINA SOLUTIONS
ISC & ICSE SPECIMEN PAPERS 2019
Question 2. Select the correct answer from the choice in bracket to complete each sentence: 1. Matter is de ned as anything that occupies space and has mass 2. The three states of matter are classi ed on the basis of differences of certain physical. 3. Matter made up of one kind of particles is said to be homogeneous. 4. Particles in a gas possess very large kinetic energy. 5. The inter molecular force of attraction is maximum in solids. Question 3. Give reasons for the following. 1. Gases have no de nite shape or volume. 2. Liquids have one free upper surface only. 3. Globules of mercury kept in a petri dish, which is shaken slowly, come together forming a big globule. 4. A crystal of iodine on slow heating in a closed ask, turns into vapours and lls the complete ask. 5. An empty tumbler lowered into a glass beaker containing water, on tilting shows bubbles of air coming out, but when not tilted, no bubbles are seen. Answer: 1. Any matter that is a gas has no de nite volume and no de nite shape. The molecules in a gas are least closely packed and inter molecular space between them is very large when compared to solids &
liquids. The inter molecular force of attraction between the particles are negligible. As a result a liquid
ICSE Previous Year Papers 2019 CLICK NOW ML AGGARWAL SOLUTIONS RS does AGGARWAL SOLUTIONS ICSE SOLUTIONS not easily change its shape nor they have xedSELINA volume.SOLUTIONS 2. Liquids have one free upper surface only because as liquids have a de nite volume but no shape and liquids are bounded the container, they are placed in and have only one free surface, the ISCwhile & ICSE SPECIMEN PAPERS by 2019 upper surface. 3. This is because the air is being pushed out by the water on tilting the tumbler inside the beaker of water. Air or gases occupy space. Question 4. State the correct term from A, B, C, D, E or F in List II which represents the – change of state of matter or its relevant property from List I
Answer:
Question 5. Match the arrangement of atoms in the three states of matter in List I with the correct state in List II.
RS AGGARWAL SOLUTIONS
ICSE Previous Year Papers 2019 CLICK NOW ML AGGARWAL SOLUTIONS ICSE SOLUTIONS SELINA SOLUTIONS
ISC & ICSE SPECIMEN PAPERS 2019
Answer:
RS AGGARWAL SOLUTIONS
ICSE Previous Year Papers 2019 CLICK NOW ML AGGARWAL SOLUTIONS ICSE SOLUTIONS SELINA SOLUTIONS
ISC & ICSE SPECIMEN PAPERS 2019
Filed Under: ICSE Tagged With: Matter and its Composition, objective workbook for simpli ed icse chemistry class 7, simpli ed middle school chemistry class 7 answers, simpli ed middle school chemistry class 7 pdf, simpli ed middle school chemistry for std vii, viraf j dalal chemistry class 7 pdf
Start Download - View PDF Ad
Ad Convert From Doc to PDF, PDF to Doc Simply With The Free Online App!
FromDocToPDF
Learn more
RS AGGARWAL SOLUTIONS
ICSE Previous Year Papers 2019 CLICK NOW ML AGGARWAL SOLUTIONS ICSE SOLUTIONS SELINA SOLUTIONS
ISC & ICSE SPECIMEN PAPERS 2019 Comments
Ruchi dhadd says October 2, 2018 at 12:47 pm Awesome site for learning and referring . Reply
Leave a Reply Your email address will not be published. Required elds are marked * Comment
Name *
Email *
Website
POST COMMENT RS AGGARWAL SOLUTIONS
ICSE Previous Year Papers 2019 CLICK NOW ML AGGARWAL SOLUTIONS ICSE SOLUTIONS SELINA SOLUTIONS
ISC & ICSE SPECIMEN PAPERS 2019
RECENT POSTS Plus One Zoology Notes Chapter 8 Excretory Products and their Elimination Plus Two Maths Chapter Wise Questions and Answers Chapter 7 Integrals Plus One Zoology Notes Chapter 7 Body Fluids and Circulation Plus One Zoology Notes Chapter 6 Breathing and Exchange of Gases Plus One Botany Notes Chapter 11 Plant Growth and Development Plus One Zoology Notes Chapter 5 Digestion and Absorption Plus One Botany Notes Chapter 10 Respiration in Plants Plus One Botany Notes Chapter 9 Photosynthesis in Higher Plants Plus One Zoology Notes Chapter 4 Biomolecules Plus One Botany Notes Chapter 8 Mineral Nutrition
RS AGGARWAL SOLUTIONS
PlusCLICK One Zoology Notes Chapter 3 Structural ICSE Previous Year Papers 2019 ICSE SOLUTIONS SELINA SOLUTIONSNOW ML AGGARWAL SOLUTIONS Organisation in Animals
ISC & ICSE SPECIMEN PAPERS 2019
Disclaimer
Privacy Policy
Copyright © 2019 · Magazine Pro on Genesis Framework · WordPress · Log in