Chapter 6: Calculations Based on Chemical Equations and Eudiometry | NEET | Chemistry | DPPs

 

 NEET- CHEMISTRY

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Chapters covered: 

Class 11: 

Physics: Physical World, Units and Measurements, Motion in a Staright Line, Motion in a Plane, Laws of Motion, Work, Energy and Power, System of Particles and Rotational Motion, Gravitation, Mechanical Properties of Solids, Mechanical Properties of Fluids, Thermal Properties of Matter, Thermodynamics, Kinetic Theory, Oscillations, Waves.

Chemistry: Some Basic Concepts of Chemistry, Structure of The Atom, Classification of Elements and Periodicity in Properties, Chemical Bonding and Molecular Structure, States of Matter, Thermodynamics, Equilibrium, Redox Reactions, Hydrogen, The S-Block Elements, The P-Block Elements, Organic Chemistry - Some Basic Principles and Techniques, Hydrocarbons, Environmental Chemistry.

Biology: The Living World, Biological Classification, Plant Kingdom, Animal Kingdom, Morphology of Flowering Plants, Anatomy of Flowering Plants, Structural Organisation in Animals, Cell The Unit of Life, Biomolecules, Cell Cycle and Cell Division, Transport in Plants, Mineral Nutrition, Photosynthesis in Higher Plants, Respiration in Plants, Plant Growth and Development, Digestion and Absorption, Breathing and Exchange of Gases, Body Fluids and Circulation, Excretory Products and their Elimination, Locomotion and Movement, Neural Control and Coordination, Chemical Coordination and Integration.

Class 12: 

Physics: Electric Charges And Fields, Electrostatic Potential And Capacitance, Current Electricity, Moving Charges And Magnetism, Magnetism And Matter, Electromagnetic Induction, Alternating Current, Electromagnetic Waves, Ray Optics and Optical Instruments, Wave Optics, Dual Nature Of Radiation And Matter, Atoms, Nuclei, Semiconductor Electronics Materials Devices And Simple Circuits, Communication Systems.

Chemistry: The Solid State, Solutions, Electro chemistry, Chemical Kinetics, Surface Chemistry, General Principles and Processes of Isolation of Elements, The p Block Elements, The d and f Block Elements, Coordination Compounds, Haloalkanes and Haloarenes, Alcohols Phenols and Ethers, Aldehydes Ketones and Carboxylic Acids, Amines, Biomolecules, Polymers, Chemistry in Everyday Life.

Biology: Reproduction in Organisms, Sexual Reproduction in Flowering Plants, Human Reproduction, Reproductive Health, Principles of Inheritance and Variation, Molecular Basis of Inheritance, Evolution, Human Health and Disease, Strategies for Enhancement in Food Production, Microbes in Human Welfare, Biotechnology - Principles And Processes, Biotechnology and its Applications, Organisms and Populations, Ecosystem, Biodiversity and Conservation, Environmental Issues.

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How are these dpps useful to u?

1)These dpps can be used to prepare for various Engineering as well as Medical exams such as IT JEE Mains & Advance, MHT CET, VITEEE, KIITEE, WBJEE ,NEET, AIIMS, JIPMER, PGIMER), CBSE Board, ICSE Board, Class 12th, 11th.

2) We are providing u very important dpps which can be proven useful to Many students to crack competitive exams as well as board examinations

MCQS

1. Calculate the number of millilitres (at stp) of hydrogen sulphide needed to precipitate cupric sulphide completely from 100 mL of a solution containing 0.75 g of CuCl2 in a 1-L solution.

(a) 21.4 (b) 14.2

(c) 41.2 (d) 12.4

Solution- At the end

2. Aluminium metal is prepared by the electrolysis of a solution of Al2O3 in molten cryolite (Na3AlF6). Assuming that all of the aluminium comes from Al2O3, how much of the latter would be needed for each tonne of aluminium produced (Al = 27, O = 16)?

(a) 1.88 tonne (b) 2.88 tonne

(c) 1.68 tonne (d) 1.44 tonne

Solution- At the end

3. An ore contains 2.0% of the mineral argentite (Ag2S) by weight. How much of this ore will have to be processed to obtain 1.00 g of pure solid silver (Ag = 108, S = 32)?

(a) 45.7 g (b) 67.4 g

(c) 57.4 g (d) 87.6 g

Solution- At the end

4. An organic compound contains 20 atoms of carbon per molecule, the percentage of carbon by weight being 70. The gram molecular mass of the organic compound is approximately

(a) 465.0 (b) 365.0

(c) 415.0 (d) 667.0

Solution- At the end

5. What is the maximum amount of nitrogen dioxide that can be produced by mixing 4.2 g of NO(g) and 3.2 g of O2(g)?

(a) 4.60 g (b) 2.30 g

(c) 3.22 g (d) 6.44 g

Solution- At the end

6. 2 g of impure CaCO3 reacts with HCl to produce 410 mL of CO2 at 1 atmospheric pressure and 27°C. Calculate the percentage purity of the CaCO3 used.

(a) 83.5 (b) 97.5

(c) 87.5 (d) 73.5

Solution- At the end

7. 60 g of NaOH is converted into NaCl and NaClO3 by the action of Cl2. The Cl2 is produced by the reaction between MnO2 and concentrated HCl. The amount of MnO2 required for the process (Mn = 55, Na = 23) is

(a) 70.95 g (b) 25.65 g

(c) 65.25 g (d) 75.45 g

Solution- At the end

8. 10.0 mL of a gaseous organic compound containing C, H and O was mixed with 100.0 mL of oxygen gas, causing an explosion. The volume of the gas after the explosion was 90.0 mL. On treatment with a KOH solution, a further contraction in volume was observed. Calculate the number of moles of the carbon dioxide produced.

(a) 1.0 (b) 3.0

(c) 2.0 (d) 4.0

Solution- At the end

9. 40.0 mL of a gaseous mixture of CO and C2H2 is mixed with 100.0 mL of O2 and burnt. The volume of the gas after the combustion is 10.5 mL. Calculate the composition of the original mixture.

(a) 25 mL of CO and 15 mL of C2H2

(b) 15 mL of CO and 25 mL of C2H2

(c) 10 mL of CO and 30 mL of C2H2

(d) 20 mL of CO and 20 mL of C2H2

Solution- At the end

10. What is the volume of air required for the complete combustion of 20.0 L of methane?

(a) 840 L (b) 240 L

(c) 240 L (d) 192 L

Solution- At the end

SOLUTIONS

1) Ans: d

2) Ans: a

3) Ans: c

4) Ans: b

5) Ans: d

6) Ans: a

7) Ans: c

8) Ans: c

9) Ans: a

10) Ans: d