Higher Secondary Chemistry Curriculum Overview

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Questions and Answers

Which technique is used to determine the purity of a sample by observing its solid formation?

  • Crystallization (correct)
  • Filtration
  • Distillation
  • Titration

What can be used to measure the acidity or basicity of a solution?

  • Volumetric flask
  • Burette
  • pH paper (correct)
  • Thermometer

When determining the boiling point of a compound, which factor can increase the boiling point?

  • Decrease in temperature
  • Decreasing the surface area
  • Increase in atmospheric pressure (correct)
  • Adding a non-volatile solute

Which of the following pairs of ions are typically used in studies of chemical equilibrium?

<p>Ferric ions and thiocyanate ions (C)</p> Signup and view all the answers

In qualitative analysis, which cation can you determine from a given salt?

<p>Fe3+ (A)</p> Signup and view all the answers

During a titration experiment, which compound is commonly used as a standard solution?

<p>Sodium hydroxide (B)</p> Signup and view all the answers

What type of acid will show a significant pH change in comparison to a weak acid of the same concentration?

<p>Strong acid (A)</p> Signup and view all the answers

Which approach is taken to determine the concentration of ions during equilibrium shifts?

<p>Increase in concentration (D)</p> Signup and view all the answers

What is the correct order of protein structure from simplest to most complex?

<p>Primary, Secondary, Tertiary, Quaternary (C)</p> Signup and view all the answers

Which of the following describes denaturation of proteins?

<p>The alteration of a protein's structure affecting its function (D)</p> Signup and view all the answers

What is a primary function of enzymes?

<p>To act as catalysts in biochemical reactions (B)</p> Signup and view all the answers

Which of the following correctly categorizes vitamins?

<p>Classified into fat-soluble and water-soluble vitamins (B)</p> Signup and view all the answers

What is the role of emulsifying agents in stabilizing emulsions?

<p>To stabilize mixtures of oil and water (D)</p> Signup and view all the answers

What does the enthalpy of neutralization measure?

<p>The amount of heat produced during a reaction between an acid and base (D)</p> Signup and view all the answers

In the reaction between sodium thiosulphate and hydrochloric acid, what factors can affect the rate?

<p>Both concentration and temperature (B)</p> Signup and view all the answers

Which of the following is a lyophobic sol?

<p>Aluminium hydroxide (A)</p> Signup and view all the answers

Which of the following is NOT a type of system in thermodynamics?

<p>Mixed system (A)</p> Signup and view all the answers

What does Hess's law pertain to in thermodynamics?

<p>Constant heat summation (A)</p> Signup and view all the answers

Which statement about the first law of thermodynamics is correct?

<p>Energy can be transformed from one form to another. (B)</p> Signup and view all the answers

What do redox reactions involve?

<p>Simultaneous oxidation and reduction processes (C)</p> Signup and view all the answers

Which equation relates Gibbs energy change and EMF of a cell?

<p>Van't Hoff equation (D)</p> Signup and view all the answers

What is the main focus of the second law of thermodynamics?

<p>Entropy and energy dispersal (C)</p> Signup and view all the answers

What does Le Chatelier's principle describe?

<p>How changes in conditions affect equilibrium position (C)</p> Signup and view all the answers

What does the collision theory in chemical kinetics explain?

<p>Why some reactions occur faster than others (B)</p> Signup and view all the answers

In the context of transition metals, what is ionization enthalpy?

<p>Energy required to remove an electron (C)</p> Signup and view all the answers

Which of the following describes a strong electrolyte?

<p>Completely ionizes in solution (A)</p> Signup and view all the answers

What is the purpose of a buffer solution?

<p>To resist changes in pH upon addition of acids or bases (A)</p> Signup and view all the answers

What does the term 'coordination number' refer to in coordination compounds?

<p>The number of ligands attached to a central atom (C)</p> Signup and view all the answers

What is the primary concept introduced in Dalton's atomic theory?

<p>Atoms are indivisible and indestructible. (B)</p> Signup and view all the answers

In organic chemistry, what does the inductive effect refer to?

<p>The polarization of a bond due to electronegativity differences (A)</p> Signup and view all the answers

What phenomenon explains the magnetic properties of transition metals?

<p>Crystal field theory (D)</p> Signup and view all the answers

Which of the following is a characteristic of lanthanoids?

<p>Lanthanoid contraction (A)</p> Signup and view all the answers

Which principle explains the filling of electrons in atomic orbitals?

<p>Aufbau principle (A)</p> Signup and view all the answers

What are isobars?

<p>Atoms with the same mass number but different atomic numbers. (D)</p> Signup and view all the answers

What is the value of the half-life in a zero-order reaction?

<p>Independent of the initial concentration (B)</p> Signup and view all the answers

Which of the following describes the shape of p orbitals?

<p>Dumbbell-shaped (A)</p> Signup and view all the answers

What does the term 'electronegativity' refer to in the context of chemical bonding?

<p>The ability of an atom to attract electrons in a bond. (B)</p> Signup and view all the answers

In which type of bond do electrons get shared between atoms?

<p>Covalent bond (A)</p> Signup and view all the answers

What is a significant feature of the modern periodic table?

<p>Elements are arranged by increasing atomic number. (A)</p> Signup and view all the answers

What is the concept of hybridization in chemical bonding?

<p>The mixing of atomic orbitals to form new, equivalent orbitals. (B)</p> Signup and view all the answers

What is the primary purpose of paper chromatography as mentioned?

<p>To separate pigments from extracts of leaves and flowers (B)</p> Signup and view all the answers

Which compound involves the preparation of a double salt?

<p>Ferrous Ammonium Sulphate (D)</p> Signup and view all the answers

What ions are targeted in qualitative analysis of a given salt?

<p>Pb2+ and Cl- (D)</p> Signup and view all the answers

For which reaction is the concentration of KMnO4 determined through titration?

<p>With a standard solution of oxalic acid (A)</p> Signup and view all the answers

What is a common test for the presence of a ketonic functional group?

<p>Iodoform test (C)</p> Signup and view all the answers

Which project investigates the presence of oxalate ions?

<p>Study of guava fruit at different stages of ripening (C)</p> Signup and view all the answers

Which of the following compounds is not involved in the preparation of organic compounds listed?

<p>Potash Alum (B)</p> Signup and view all the answers

What is the expected impact of temperature on the effect of salivary amylase?

<p>Increases enzyme activity significantly at low temperatures (B)</p> Signup and view all the answers

Flashcards

Atomic Mass

The mass of an atom, typically expressed in atomic mass units (amu).

Mole Concept

A mole is the amount of a substance containing as many elementary entities as there are atoms in exactly 12 g of 12C.

Isotopes

Atoms of the same element with the same number of protons but different numbers of neutrons.

Electron Configuration

The arrangement of electrons in the energy levels and sublevels of an atom.

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Periodic Table

A tabular arrangement of elements ordered by atomic number and recurring chemical properties.

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Ionic Bond

A chemical bond formed by the electrostatic attraction between oppositely charged ions.

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Covalent Bond

A chemical bond formed by the sharing of electron pairs between atoms.

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Quantum Numbers

Set of numbers describing the properties of atomic orbitals and the electrons in them.

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System in Thermodynamics

A specified region of the universe, where the rest is called surroundings, that is the focus of study in thermodynamics.

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First Law of Thermodynamics

Energy can be converted from one form to another, but it cannot be created or destroyed.

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State Function

A property of a system that only depends on the current state of the system, not the way it got there

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Equilibrium Constant (K)

A numerical value that represents the ratio of products to reactants at equilibrium for a chemical reaction.

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Le Chatelier's Principle

If a stress is applied to a system in equilibrium, the system shifts in a way that relieves the stress.

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Oxidation

A process that involves the loss of electrons and an increase in oxidation number.

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Redox Reaction

A chemical reaction involving both oxidation and reduction.

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Homolytic Fission

A type of covalent bond breaking in which each atom in the bond gets one electron from the bonding pair; the result are two radicals.

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Melting Point Determination

A laboratory technique used to find the temperature at which a solid substance changes to a liquid state.

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Boiling Point Determination

A lab technique finding the temp where a liquid changes to a gas.

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Crystallization

Purification technique for solid substances based on their different solubilities in a solvent.

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pH Determination

Measuring the acidity or basicity of a solution using pH paper or a universal indicator.

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Chemical Equilibrium

A dynamic state in a reversible reaction in which the rates of the forward and reverse reactions are equal.

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Quantitative Estimation

Measuring the amount of a substance in a solution, often using titration.

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Qualitative Analysis

Identifying the presence or absence of specific ions or elements in a sample.

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Titration

A lab technique to determine the concentration of an unknown solution by reacting it with a solution of known concentration.

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Electrochemical cell

A device that converts chemical energy into electrical energy, or vice-versa.

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Rate of reaction

The speed at which a chemical reaction proceeds.

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Reaction order

The power to which the concentration of a reactant is raised in the rate law.

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Transition metals

Elements in the periodic table with partially filled d-orbitals.

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Coordination compounds

Compounds with a central metal atom or ion bonded to a group of surrounding molecules or ions.

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Ligands

Molecules or ions surrounding the central metal atom/ion in a coordination compound.

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Lanthanoid contraction

The gradual decrease in the size of atoms of lanthanoid elements across the series.

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Enthalpy Change of Hydrogen Bonding

The heat change associated with the formation of hydrogen bonds between acetone and chloroform molecules.

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Cell Potential Variation

The change in voltage of an electrochemical cell when the concentration of electrolytes (CuSO4 or ZnSO4) is altered at a constant temperature.

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Rf Value in Chromatography

The ratio of the distance traveled by a substance to the distance traveled by the solvent front in chromatography.

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Double Salt Preparation

The synthesis of a compound containing two cations and one anion, such as Ferrous Ammonium Sulphate or Potash Alum.

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Functional Group Tests

Chemical tests used to identify the presence of specific functional groups in organic molecules.

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KMnO4 Solution Titration

Determining the concentration of a potassium permanganate solution by reacting it with a known amount of oxalic acid or ferrous ammonium sulphate.

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Soybean Milk Study

Investigating the properties of soybean milk, including curd formation and its response to temperature, compared to natural milk.

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Amino Acids

The building blocks of proteins, containing an amino group (-NH2) and a carboxyl group (-COOH). They link together to form long chains called polypeptides.

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Peptide Bond

The special type of covalent bond that connects amino acids in a polypeptide. It's formed between the carboxyl group of one amino acid and the amino group of another, releasing water.

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Polypeptide

A long chain of amino acids linked by peptide bonds. It's like a string of pearls, with each pearl being an amino acid.

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Protein

A large, complex molecule made up of one or more polypeptide chains, folded into a specific 3D shape. Proteins play crucial roles in almost all biological processes.

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Primary Structure

The linear sequence of amino acids in a polypeptide chain. It's like the order of letters in a word.

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Secondary Structure

The local 3D folding of a polypeptide chain, usually into alpha helices or beta sheets. It's like folding a paper into shapes.

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Tertiary Structure

The overall 3D shape of a single polypeptide chain, resulting from interactions between side chains of amino acids. It's like giving a 3D shape to the folded paper.

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Quaternary Structure

The arrangement of multiple polypeptide chains in a protein, forming a complex with a specific 3D shape. It's like putting together multiple folded papers to create a bigger model.

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Study Notes

Chemistry Curriculum Rationale

  • Higher Secondary is a crucial stage for specialized discipline-based courses, preparing students for tertiary-level studies in science or related fields.
  • The new curriculum emphasizes depth and breadth, keeping pace with international standards while avoiding an overly heavy syllabus.
  • Chemistry has undergone significant changes in recent years, including new areas like synthetic materials, biomolecules, and industrial chemistry.
  • Revised syllabi incorporate new nomenclature, symbols, and formulations, reflecting updates from scientific bodies like IUPAC and CGPM.

Chemistry Curriculum Objectives

  • Foster a deep understanding of fundamental chemistry while maintaining interest in the subject.

  • Prepare students for advanced studies in chemistry, medicine, engineering, or relevant fields.

  • Introduce emerging areas of chemistry and their applications in various scientific and technological fields.

  • Equip students to address challenges in health, nutrition, environmental concerns, and related issues.

  • Improve problem-solving abilities and enhance understanding of industrial processes and their applications.

  • Expose students to the interplay between chemistry and other scientific disciplines, including physics, biology, and geology.

  • Develop a broader interest in chemistry as a field of study.

  • Integrate life skills and values into the context of chemical principles.

Class XI Chemistry Course Structure

  • The course is divided into Units covering core concepts like basic concepts of chemistry, structure of atom, classification of elements, chemical bonding, chemical thermodynamics, equilibrium, redox reactions, organic chemistry, and hydrocarbons.
  • Specific topics and period allocations are provided for each unit.
  • Topics, including Atomic structure, periodic trends, chemical bonding, and basic chemical calculations, are detailed in the schedule.

Class XII Chemistry Course Structure

  • The course covers more advanced topics in different units similar to class XI including surface chemistry, chemical kinetics, chemical thermodynamics, electrochemistry, d and f block elements, coordination compounds, and additional organic chemistry modules.
  • Units such as aldehydes, ketones, and carboxylic acids, amines, biomolecules and additional experiments are covered.
  • Practical components are included focusing on both theoretical understanding and practical skills.
  • Specific experiments, including those for surface chemistry and chemical kinetics, are described.

Practical Examination Schedule

  • The practical examination is 2 hours long.
  • A set of experiments is outlined to cover various areas of Chemistry.
  • Specific topics and materials are to be used and applied in the experiments.
  • Evaluation schemes are described highlighting required practical skills and techniques.

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