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Chapters
2: Chemical Bonding
3: Acids, Bases and Salts
4: Analytical Chemistry
▶ 5: Mole Concept and Stoichiometry
Chapter 6: Electrolysis
Chapter 7: Metallurgy
Chapter 8: Study of Compounds: Hydrogen Chloride
Chapter 9: Study of Compounds: Ammonia
Chapter 10: Study of Compounds: Nitric Acid
Chapter 11: Study of Compounds: Sulphuric Acid
Chapter 12: Organic Chemistry
Chapter 13: Practical Work
![Lakhmir Singh solutions for Chemistry [English] Class 10 ICSE chapter 5 - Mole Concept and Stoichiometry - Shaalaa.com](/images/chemistry-english-class-10-icse_6:b9d33ffc3c864725b49a398fa5334703.jpg "Lakhmir Singh solutions for Chemistry [English] Class 10 ICSE chapter 5 - Mole Concept and Stoichiometry")
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Solutions for Chapter 5: Mole Concept and Stoichiometry
Below listed, you can find solutions for Chapter 5 of CISCE Lakhmir Singh for Chemistry [English] Class 10 ICSE.
Lakhmir Singh solutions for Chemistry [English] Class 10 ICSE 5 Mole Concept and Stoichiometry Intext Question [Pages 96 - 105]
TEST YOUR UNDERSTANDING - 1
State whether the following statement is True or False.
A mole is a collection of elementary particles.
State whether the following statement is True or False.
The simplest ratio of volumes of nitrogen, hydrogen and ammonia in the formation of ammonia is 1 : 3 : 1.
State whether the following statement is True or False.
Avogadro's number is denoted by NA.
Fill in the following blanks with suitable words.
According to ______ law, equal volumes of all gases under the same conditions of temperature and pressure contain the same number of molecules.
______ is the smallest particle of an element that can take part in a chemical reaction.
Atomicity of sulphur is ______.
Which of the following is a tetratomic molecule?
Ozone
Nitrogen
Phosphorus
Sulphur
The simple ratio of volumes in which hydrogen and chlorine molecules combine to give HCl is ______.
2 : 1
1 : 2
1 : 1
2 : 3
State Gay-Lussac’s law of combining volumes.
State the distinction made by Avogadro between atoms and molecules.
Define limiting reagent. Give a suitable example.
What volume of ammonia is required to produce 130 cm3 of steam?
\[\ce{4NH3 + 5O2 -> 4NO + 6H2O}\]
A sample of ammonium nitrate upon heating yields 7.58 dm3 of steam.
\[\ce{NH4NO3 -> N2O + 2H2O}\]
What volume of N2O is released?
TEST YOUR UNDERSTANDING - 2
State whether the following statement is True or False.
Atomic mass unit, 1 u equals to one-twelfth the mass of a carbon-12 atom.
State whether the following statement is True or False.
1 mole of sulphur (S8) contains 8 × 6.022 × 1023 atoms.
State whether the following statement is True or False.
The vapour density of a gas or vapour is twice its relative molecular mass.
Fill in the following blanks with suitable words.
Gram molecular mass of any gas occupies ______ dm3 of volume at S.T.Р.
Weight of 6.022 × 1023 molecules of a gas is equal to its gram ______ mass.
Gram molecular mass of water is ______ g.
Choose the correct option for each of the following questions.
1 L of any gas would weigh how many times its vapour density.
22.4
0.089
11.2
2.24
How many grams of ammonia is present in its 0.2 mole?
5.4 g
8.5 g
4.5 g
3.4 g
Number of molecules in 0.49 g of H2SO4 is ______ × 1021.
6.022
30.11
0.03
3.01
What do you mean by Atomic mass?
What do you understand by the term mole.
Define the term:
Vapour density
Calculate the mass of one atom of nitrogen and one molecule of nitrogen (atomic mass of nitrogen = 14 u).
Calculate the mass of 15.055 × 1022 molecules of carbon dioxide.
What will be the atomicity of nitrogen if 14 g of nitrogen occupies 11.2 L at S.T.P.?
What will be the volume (in cm3) occupied by 0.8 g of Cl2 at S.T.P.?
What volume will 26.4 g of a gas will occupy at S.T.P. if its vapour density is 22?
TEST YOUR UNDERSTANDING - 3
State whether the following statement is True or False.
The empirical formula of hydrogen peroxide is OН.
State whether the following statement is True or False.
The empirical formula and molecular formula of a compound may be the same.
State whether the following statement is True or False.
Benzene has the same empirical and molecular formula.
Fill in the following blanks with suitable words.
The percentage composition of an element in a compound is its mass in ______ g of the compound.
The percentage of water of crystallisation in hydrous copper sulphate is ______.
The empirical formula of acetic acid is ______.
Solutions for 5: Mole Concept and Stoichiometry
Lakhmir Singh solutions for Chemistry [English] Class 10 ICSE chapter 5 - Mole Concept and Stoichiometry
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Concepts covered in Chemistry [English] Class 10 ICSE chapter 5 Mole Concept and Stoichiometry are .
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