CBSE Class 9 Science Atoms and Molecules Worksheet Set H

Read and download free pdf of CBSE Class 9 Science Atoms and Molecules Worksheet Set H. Download printable Science Class 9 Worksheets in pdf format, CBSE Class 9 Science Chapter 3 Atoms and Molecules Worksheet has been prepared as per the latest syllabus and exam pattern issued by CBSE, NCERT and KVS. Also download free pdf Science Class 9 Assignments and practice them daily to get better marks in tests and exams for Class 9. Free chapter wise worksheets with answers have been designed by Class 9 teachers as per latest examination pattern

Chapter 3 Atoms and Molecules Science Worksheet for Class 9

Class 9 Science students should refer to the following printable worksheet in Pdf in Class 9. This test paper with questions and solutions for Class 9 Science will be very useful for tests and exams and help you to score better marks

Class 9 Science Chapter 3 Atoms and Molecules Worksheet Pdf

 
ATOMS AND MOLECULES

1 Mark Questions:
 
i. State the law of constant proportion.
 
ii. Which postulate of Dalton’s atomic theory is the result of the law of conservation of mass?
 
iii. Write the molecular formula of a diatomic gas and a triatomic gas.
 
iv. Name the term used for the symbolic representation of a molecule of an element or a compound? Give an example of it.
 
v. In the reaction between copper sulphate solution and sodium sulphide solution, 15.9g copper sulphate completely reacts with 7.8g of sodium sulphide. It is observed that 9.5g of copper sulphide is formed. What is the mass of sodium sulphate solution formed?
 
vi. Why is the symbol of gold taken as Au?
 
vii. Calculate the formula unit mass of NaHCO3. (at.mass: Na=23u H=1u C=12u,O=16u)
 
viii. Define Avogadro’s number. What is its value?
 
ix. What is the ratio between masses of carbon and oxygen in CO2?
 
x. Define atomicity of an element.
 
xi. Nitrogen and hydrogen are present in ammonia in the ratio 14:3 by mass.What would be the mass of nitrogen if the actual mass of hydrogen is 9g?
 
2 Mark Questions:
 
i. Silver nitrate solution was mixed with 5g of sodium chloride solution to verify law of conservation of mass. 8.1 gram of silver chloride was formed and sodium nitrate formed was equal to half of the amount of silver nitrate solution used. What is the amount of silver nitrate used and sodium nitrate formed?
 
ii. (a)What is the significance of symbols?
 
(b)What do the abbreviations 2O and O2 stand for?
 
iii. (a)Taking the example of water, explain the law of constant proportion.
 
(b)Which postulate of Daltons’ atomic theory explains this law?
 
iv. What are polyatomic ions? Give any two examples.
 
v. Give the names of elements present in:-
 
(a)sodium nitrate (b) ammonium hydrogen carbonate (c) iron(III)sulphate
 
vi. Write the formulae and names of compounds formed by combination of:
 
(a) Fe3+ and SO42- (b) NH4+ and CO32-
 
vii. Using the valencies, write down the chemical formulae of the following compounds:
 
(a)calcium nitrate                            (b) manganese(IV) oxide
 
(c) ammonium phosphate                (d) aluminium chloride
 
 
viii. Define following :- (a)formula unit mass (b) molecular mass
 
ix. Define mole and find the number of moles present in 1.6g of oxygen gas.
 
x. (a)How many grams of chlorine are contained in one mole of chlorine?
 
(b) How many molecules are there in 7.1g of chlorine gas?
     (atomic mass: Cl=35.5u)
 
xi. Write the valency of each cation and anion in the following compounds.
 
(a) FeN ( b) CuSO4
 
(c) AlPO4 (d) NH4HCO3

3 Mark Questions:
 
i. (a) What are ionic and molecular compounds? Give examples.
 
(b) Find the ratio by mass of the combining elements in the following compounds.
 
(a) SO2 (b) CaH2 ( at.mass: S=32u , O=16 , Ca=40u , H=1u )
 
ii. Calculate the mass of 0.5 mole of sugar (C12H22O11).
 
(at.mass: C=12u, H=1u, O=16u).
 
iii. Name the ionic compound that is obtained from sea water and calculate the number of moles present in 5.85 g of this compound.
 
iv. What is the atomicity of sulphur. Calculate the number of moles in 0.4g of sulphur powder. ( at.mass of S= 32 )
 
v. Calculate the number of moles:
 
(a) 3.011 x 1023 atoms of carbon (b) 9g of water
 
( at. mass: O = 16 u, H=1u C = 12u )
 
vi. (a) Which has more number of particles , 48g of Mg or 7g of nitrogen?
 
(at.mass: Mg = 24 u, N = 14 u)
 
(b) State the postulates of Dalton’s atomic theory.
 
vii. Calculate the number of atoms in 120g of calcium and 120g of iron. Which one has more number of atoms? (at.mass: Ca = 40 u , Fe= 56 u)
 
viii. (a) Calculate the number of molecules in 90g of C6H12O6.
 
( at.mass: C=12u H=1u O=16u)
 
(b) Calculate the mass of 0.5 moles of nitrogen gas. (at.mass N=14u)
 
ix. Name and state the laws of chemical combination.
 
x. An element P shows two valencies 3 and 4 .Write the formulae of possible oxides of this element.
 
xi. Calculate the molecular mass / formula mass of each of the following and write the corresponding value of gram molecular mass.
 
(a) ethanoic acid (CH3COOH) (b) sugar (C12H22O11)
 
(c)sodium carbonate (Na2CO3) (d) copper sulphate (CuSO4.5H2O)
 
(at.mass: H=1u O=16u C=12u Na=23u S=32u Cu=63.5u )
 
xii. Define the following terms :
 
a) atom    b) molecule     c) polyatomic molecule    d) unified mass
 
e) relative atomic mass    f) molecular formula       g) molar mass
 
Multiple choice questions :
 
i) The symbols of the elements cobalt , zinc , manganese and fluorine written by a student are as follows. Which symbol is the correct one?
 
a) CO             b) ZN          c) Mg                 d)F
 
ii)The number of electrons in an ion X3- is 10. The atomic number of X is :
 
a)7               b)5              c)10                  d)8
 
iii)If 12g of carbon has n atoms , then what is the number of atoms in the same amount of Mg? (Given that atomic mass of C=12u & Mg=24u)
 
a)n               b) 2n           c) n/2               d)1.5n
 
iv) Which of the following represents the correct chemical formula?
 
a)NaO          b)Na3N       c)NaSO4            d)NaS
 
Assertion-Reason questions: 
 
The questions below consist of statement of an assertion and a reason.
 
Choose the correct option.
 
(a) If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
 
(b) If both Assertion and Reason are true but Reason is not the correct  explanation of Assertion.
 
c) If Assertion is correct but Reason is incorrect
 
d) If Assertion is incorrect , but reason is correct
 
i)Assertion: One mole of hydrogen atom is equal to half mole of hydrogen molecule.
 
Reason: Every molecule of hydrogen is constituted by two atoms.
 
ii)Assertion: Atoms are electrically neutral.
 
Reason: Atoms contain equal number of electrons and protons which are oppositely charged.
 
iii)Assertion: A positively charged atom is called a cation.
 
Reason: A cation is formed when an atom gains one or more protons.
 
 
 
 
Please click on below link to download CBSE Class 9 Science Atoms and Molecules Worksheet Set H
Chapter 01 Matter in Our Surroundings
CBSE Class 9 Science Matter in Our Surroundings Worksheet Set A
CBSE Class 9 Science Matter in Our Surroundings Worksheet Set B
CBSE Class 9 Science Matter in Our Surroundings Worksheet Set C
CBSE Class 9 Science Matter in Our Surroundings Worksheet Set D
CBSE Class 9 Science Matter in Our Surroundings Worksheet Set E
CBSE Class 9 Science Matter in Our Surroundings Worksheet Set F
CBSE Class 9 Science Matter in Our Surroundings Worksheet Set G
CBSE Class 9 Science Matter in Our Surroundings Worksheet Set H
CBSE Class 9 Science Matter in Our Surroundings Worksheet Set I
Chapter 02 Is Matter Around Us Pure
CBSE Class 9 Science Is Matter Around Us Pure Worksheet Set A
CBSE Class 9 Science Is Matter Around Us Pure Worksheet Set B
CBSE Class 9 Science Is Matter Around Us Pure Worksheet Set C
CBSE Class 9 Science Is Matter Around Us Pure Worksheet Set C
CBSE Class 9 Science Is Matter Around Us Pure Worksheet Set D
CBSE Class 9 Science Is Matter Around Us Pure Worksheet Set D
CBSE Class 9 Science Is Matter Around Us Pure Worksheet Set E
CBSE Class 9 Science Is Matter Around Us Pure Worksheet Set E
CBSE Class 9 Science Is Matter Around Us Pure Worksheet Set F
Chapter 03 Atoms and Molecules
CBSE Class 9 Science Atoms and Molecules Worksheet Set A
CBSE Class 9 Science Atoms and Molecules Worksheet Set B
CBSE Class 9 Science Atoms and Molecules Worksheet Set C
CBSE Class 9 Science Atoms and Molecules Worksheet Set D
CBSE Class 9 Science Atoms and Molecules Worksheet Set E
CBSE Class 9 Science Atoms and Molecules Worksheet Set F
CBSE Class 9 Science Atoms and Molecules Worksheet Set G
CBSE Class 9 Science Atoms and Molecules Worksheet Set H
Chapter 04 Structure of the Atom
CBSE Class 9 Science Structure of The Atom Worksheet Set A
CBSE Class 9 Science Structure of The Atom Worksheet Set B
CBSE Class 9 Science Structure of The Atom Worksheet Set C
CBSE Class 9 Science Structure of The Atom Worksheet Set D
Chapter 05 The Fundamental Unit of Life
CBSE Class 9 Science Fundamental Unit of Life Worksheet Set A
CBSE Class 9 Science Fundamental Unit of Life Worksheet Set B
CBSE Class 9 Science Fundamental Unit of Life Worksheet Set C
CBSE Class 9 Science Fundamental Unit of Life Worksheet Set D
CBSE Class 9 Science Fundamental Unit of Life Worksheet Set E
CBSE Class 9 Science Fundamental Unit of Life Worksheet Set F
CBSE Class 9 Science Fundamental Unit of Life Worksheet Set G
Chapter 06 Tissues
CBSE Class 9 Science Plant Tissues Worksheet Set A
CBSE Class 9 Science Tissue Worksheet Set C
CBSE Class 9 Science Tissue Worksheet Set D
CBSE Class 9 Science Tissue Worksheet Set E
CBSE Class 9 Science Tissue Worksheet Set F
CBSE Class 9 Science Tissues Worksheet Set A
CBSE Class 9 Science Tissues Worksheet Set B
Chapter 07 Diversity In Living Organisms
CBSE Class 9 Science Diversity in Living Organism Worksheet Set A
CBSE Class 9 Science Diversity in Living Organism Worksheet Set B
CBSE Class 9 Science Diversity In Living Organisms Worksheet Set C
CBSE Class 9 Science Diversity In Living Organisms Worksheet Set D
CBSE Class 9 Science Diversity In Living Organisms Worksheet Set E
CBSE Class 9 Science Diversity In Living Organisms Worksheet Set F
Chapter 08 Motion
CBSE Class 9 Science Motion Worksheet Set A
CBSE Class 9 Science Motion Worksheet Set B
CBSE Class 9 Science Motion Worksheet Set C
CBSE Class 9 Science Motion Worksheet Set D
CBSE Class 9 Science Motion Worksheet Set E
CBSE Class 9 Science Motion Worksheet Set F
CBSE Class 9 Science Motion Worksheet Set G
CBSE Class 9 Science Motion Worksheet Set H
CBSE Class 9 Science Motion Worksheet Set I
CBSE Class 9 Science Motion Worksheet Set J
Chapter 09 Force and Laws of Motion
CBSE Class 9 Science Force and Laws of Motion Worksheet Set A
CBSE Class 9 Science Force and Laws of Motion Worksheet Set B
CBSE Class 9 Science Force and Laws of Motion Worksheet Set C
CBSE Class 9 Science Force and Laws of Motion Worksheet Set D
CBSE Class 9 Science Force and Laws of Motion Worksheet Set E
CBSE Class 9 Science Force and Laws of Motion Worksheet Set F
Chapter 10 Gravitation
CBSE Class 9 Science Gravitation Worksheet Set A
CBSE Class 9 Science Gravitation Worksheet Set B
CBSE Class 9 Science Gravitation Worksheet Set C
CBSE Class 9 Science Gravitation Worksheet Set D
Chapter 11 Work and Energy
CBSE Class 9 Science Work and Energy Worksheet Set A
CBSE Class 9 Science Work and Energy Worksheet Set B
Chapter 12 Sound
CBSE Class 9 Science Sound Worksheet Set A
CBSE Class 9 Science Sound Worksheet Set B
Chapter 13 Why Do We Fall Ill
CBSE Class 9 Science Why Do We Fall ill Worksheet Set A
CBSE Class 9 Science Why Do We Fall ill Worksheet Set B
Chapter 14 Natural Resources
CBSE Class 9 Science Natural Resource Worksheet Set C
CBSE Class 9 Science Natural Resource Worksheet Set D
CBSE Class 9 Science Natural Resource Worksheet Set E
CBSE Class 9 Science Natural Resource Worksheet Set F
CBSE Class 9 Science Natural Resources Worksheet Set A
CBSE Class 9 Science Natural Resources Worksheet Set B
Chapter 15 Improvement in Food Resources
CBSE Class 9 Science Improvent in Food Resources Worksheet Set A
CBSE Class 9 Science Improvent in Food Resources Worksheet Set B
z More Worksheets for Class 9 Science
CBSE Class 9 Science Lab Worksheet Different Chemical Changes
CBSE Class 9 Science Lab Worksheet law of Conservation of Mass
CBSE Class 9 Science Lab Worksheet Melting Point of Ice
CBSE Class 9 Science Lab Worksheet Preparation of Mixture and Compound
CBSE Class 9 Science Lab Worksheet Separation of Different Components
CBSE Class 9 Science Lab Worksheet True Solution Colloid Suspension
CBSE Class 9 Science Worksheet Set A
CBSE Class 9 Science Worksheet Set B
CBSE Class 9 Science Worksheet Set C
CBSE Class 9 Science Worksheet Set D
CBSE Class 9 Science Worksheet Set E
CBSE Class 9 Science Worksheet Set F
CBSE Class 9 Science Worksheet Set G
CBSE Class 9 Science Worksheet Set H
CBSE Class 9 Science Worksheet Set I
CBSE Class 9 Science Worksheet Set J
CBSE Class 9 Science Worksheet Set K
CBSE Class 9 Science Worksheet Set L
CBSE Class 9 Science Worksheet Set M Solved
CBSE Class 9 Science Worksheet Set N Solved
CBSE Class 9 Science Worksheet Set O Solved
CBSE Class 9 Science Worksheet Set P Solved
CBSE Class 9 Science Worksheet Set Q Solved
CBSE Class 9 Science Worksheet Set R Solved
CBSE Class 9 Science Worksheet Set S Solved
CBSE Class 9 Science Worksheet Set T Solved
Tags
Printable Worksheets for Class 9
Class 9 Science Printable Worksheets
Class 9 Science pdf test papers
Class 9 Science Printable Worksheets pdf
Class 9 Science
Science Class 9 Printable Worksheets
Class 9 Science Chapter Worksheets
Printable Worksheets for Class 9 Science

Chapter 3 Atoms and Molecules CBSE Class 9 Science Worksheet

The above practice worksheet for Chapter 3 Atoms and Molecules has been designed as per the current syllabus for Class 9 Science released by CBSE. Students studying in Class 9 can easily download in Pdf format and practice the questions and answers given in the above practice worksheet for Class 9 Science on a daily basis. All the latest practice worksheets with solutions have been developed for Science by referring to the most important and regularly asked topics that the students should learn and practice to get better scores in their examinations. Studiestoday is the best portal for Printable Worksheets for Class 9 Science students to get all the latest study material free of cost. Teachers of studiestoday have referred to the NCERT book for Class 9 Science to develop the Science Class 9 worksheet. After solving the questions given in the practice sheet which have been developed as per the latest course books also refer to the NCERT solutions for Class 9 Science designed by our teachers. After solving these you should also refer to Class 9 Science MCQ Test for the same chapter. We have also provided a lot of other Worksheets for Class 9 Science which you can use to further make yourself better in Science.

Where can I download latest CBSE Practice worksheets for Class 9 Science Chapter 3 Atoms and Molecules

You can download the CBSE Practice worksheets for Class 9 Science Chapter 3 Atoms and Molecules for the latest session from StudiesToday.com

Are the Class 9 Science Chapter 3 Atoms and Molecules Practice worksheets available for the latest session

Yes, the Practice worksheets issued for Chapter 3 Atoms and Molecules Class 9 Science have been made available here for the latest academic session

Is there any charge for the Practice worksheets for Class 9 Science Chapter 3 Atoms and Molecules

There is no charge for the Practice worksheets for Class 9 CBSE Science Chapter 3 Atoms and Molecules you can download everything free

How can I improve my scores by solving questions given in Practice worksheets in Chapter 3 Atoms and Molecules Class 9 Science

Regular revision of practice worksheets given on studiestoday for Class 9 subject Science Chapter 3 Atoms and Molecules can help you to score better marks in exams

Are there any websites that offer free Practice test papers for Class 9 Science Chapter 3 Atoms and Molecules

Yes, studiestoday.com provides all the latest Class 9 Science Chapter 3 Atoms and Molecules test practice sheets with answers based on the latest books for the current academic session