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Eamcet Chemistry
Lessons
1 st Year: Unit 1.1(Basics & Concepts) - Weights & Mole concepts
1st Year : Unit 1.2 (Basics & Concepts) - Emperical & Molecular Formula
1st Year : Unit 1.3 (Basics & Concepts) - Stoichiometry
1st Year : Unit 1.4 (Basics & Concepts) - Stoichiometric Calculations
1st year Unit - 2 Atomic Structure
1st year : unit 2.1(Atomic Structure)-Introduction, Fundamental Particles
1st year :unit2.2(Atomic Structure)-De-Broglie Wave Theory
1st year:unit2.3(Atomic Structure)-Electronic Configuration
1st year:unit2.4( Atomic Structure)-Spectra, Hydrogen Spectrum, Bohr's Model
1st year :unit2.5(Atomic Structure)-Quantum Mechanical Model of Atom
1st year:unit2.6( Atomic Structure)-Nature of Electro Magnetic Radiation
Unit - 3 Periodic Classification - Periodic Classification of Elements
Unit - 3 Periodic Classification -Modern Periodic TableElectron Affinity
Unit - 3 Periodic Classification -Periodicity - Periodic Properties,Atomic Radius
Unit - 3 Periodic Classification -Electron Affinity
Unit - 3 Periodic Classification-Ionization Energy
Unit - 3 Periodic Classification -Valency
Unit - 4 Chemical Bonding -Chemical Bonding
Unit - 4 Chemical Bonding -IonicBond Hydrogen Bond
Unit - 4 Chemical Bonding-Polarity of Bonds
Unit - 4 Chemical Bonding -Hybridisation
Unit - 4 Chemical Bonding -Coordinate Covalent Bond
Unit - 4 Chemical Bonding -Bond Characteristics
Unit - 4 Chemical Bonding -Vsepr Theroy,Valence Bond Theory, Characteristic of Covalent Compounds
Unit - 4 Chemical Bonding -Molecular Orbital Theory
Unit - 4 Chemical Bonding -Hydrogen Bond
Unit - 5 States of Matter -States of Matter
Unit - 5 States of Matter -Graham's Law of Diffusion
Unit - 5 States of Matter -Kinetic Molecular Model of Gas
1 st Year : Unit 5.5(States of Matter ) - The Liquied State
1 st Year : Unit 5.4 ( States of Matter ) - Real Gases
1 st Year : Unit 6.1 (Thermo Dynamics ) - Thermodynamics-1
1 st Year : Unit 6.2 (Thermo Dynamics ) - Thermodynamics-2
1 st Year : Unit 7.1 ( Chemical Equilibrium ) -Chemical Equilibrium-1
1 st Year : Unit 7.2 ( Chemical Equilibrium ) -Chemical Equilibrium-2
1 st Year : Unit 7.3 ( Chemical Equilibrium ) -Chemical Equilibrium-3
1 st Year : Unit 7.4 ( Chemical Equilibrium ) -Chemical Equilibrium-4
1 st Year : Unit 8.1 ( Red-Ox reactions ) - Red-Ox reactions
1 st Year : Unit 9.1 ( Hydrogen And its Compounds ) - Hydrogen And its Compounds
1 st Year : Unit 10.1 ( S-Block Elements ) - Alkali Metals
1 st Year : Unit 10.2 ( S-Block Elements ) - Alkaline Earth Metals
1 st Year : Unit 11.1 ( P-Block Elements) - P-Block Elements
1 st Year : Unit 12.1 ( Organic Chemistry ) - Organic Chemistry
1 st Year : Unit 13.1 ( Hydrocarbons ) - Hydrocarbons
1 st Year : Unit 14.1 ( Environmental Chemistry ) - Environmental Chemistry - 1
1 st Year : Unit 14.2 ( Environmental Chemistry ) - Environmental Chemistry - 2
2 nd Year : Unit 1.1 ( Solid State ) - Solid State - I
2 nd Year : Unit 1.2 ( Solid State ) - Solid State – II
2 nd Year : Unit 3.1 ( Electro Chemistry ) - Electro Chemistry -1
2 nd Year : Unit 3.2 ( Electro Chemistry ) - Electro Chemistry -2
2 nd Year : Unit 3.3 ( Electro Chemistry ) - Electro Chemistry -3
2 nd Year : Unit 2.1 ( Solutions ) - Solution 1
2 nd Year : Unit 2.2 ( Solutions ) - Solution 2
2 nd Year : Unit 4.1 ( Chemical Kinetics ) - Chemical Kinetics
2 nd Year : Unit 5.1 ( Surface Chemistry ) - Surface Chemistry
2 nd Year : Unit 6.1 ( General Principles of Metallurgy ) - General Principles of Metallurgy
2 nd Year : Unit 7.1 ( Block Elements ) - VA Group Elements
2 nd Year : Unit 7.2 ( Block Elements ) - VIA Group Elements
2 nd Year : Unit 7.3 ( Block Elements ) - VIIA Group Elements
2 nd Year : Unit 8.1 ( D & F-Block Elements ) - D & F-Block Elements
2 nd Year : Unit 9.1 ( Coordinate Compounds ) - Coordinate Compounds
2 nd Year : Unit 10.1 ( Halo Alkanes And Haloarenes ) - Halo Alkanes And Haloarenes
2 nd Year : Unit 11.1 ( Alcohols, Phenols And Ethers ) - Alcohols, Phenols And Ethers
2 nd Year : Unit 12.1 ( Aldehydes, Ketones And Carboxylic Acids ) - Aldehydes, Ketones And Carboxylic Acids
2 nd Year : Unit 13.1 ( Organic Compounds Containing Nitrogen ) - Organic Compounds Containing Nitrogen
2 nd Year : Unit 14.1 ( Biomolecules ) - Biomolecules
2 nd Year : Unit 15.1 ( Polymers ) - Polymers
2 nd Year : Unit 16.1 ( Chemistry in Everday Life ) - Chemistry in Everday Life
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Eamcet Chemistry
1st Year : Unit 1.4 (Basics & Concepts) - Stoichiometric Calculations
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Q.
When 50 grams of sulphur was burnt in air, 4% of the impure residue is left over. Calculate the volume of air required at STP containing 21% of oxygen by volume.
A.
80lit
B.
120lit
C.
160lit
D.
200lit
E.
None of the above
View Answer
Correct choice: C
Explanation:
Weight of sample of sulphur taken = 50 g
Percentage of impurity = 4%
Weight of impurity in sample = ( 50X/100/4) = 2 grams
Weight of sulphur in sample = 50 – 2 = 48 grams
Combustion of sulphur gives sulphurdioxide
S + O
2
→ SO
2
1 mole of S → 1 mole of O
2
32 grams of S = 22.4 L of O
2
at STP
48 grams of S = ?
Volume of oxygen required at STP =(48/32) × 22.4 = 33.6 L
21 L of O
2
is present in 100 L of air
33.6 L of O
2
present in (33.6/21)X100== 160 lit of air.
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