Chemistry (School & UG)

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The Chemistry (School & UG) category covers the fundamental to advanced concepts of Chemistry, structured to support Class 11–12 students, competitive exam aspirants, and undergraduate learners. The content emphasizes conceptual clarity, problem-solving skills, and strong alignment with NCERT and university syllabi.

In this category, you will study:

  • Physical Chemistry – atomic structure, thermodynamics, chemical kinetics, equilibrium, electrochemistry, and solutions

  • Organic Chemistry – basic principles, reaction mechanisms, hydrocarbons, functional groups, biomolecules, and polymers

  • Inorganic Chemistry – periodic trends, chemical bonding, coordination compounds, metallurgy, and s-, p-, d-, and f-block elements

  • Numerical problem-solving – formula-based calculations, mole concept, and graph-based questions

  • Reaction mechanisms and derivations with step-by-step explanations

  • Comparisons, trends, and exceptions important for exams

  • NCERT-based theory, supported by diagrams, tables, MCQs, assertion–reason questions, numericals, and PYQs

The content is designed to build strong foundations, improve analytical and quantitative skills, and prepare students for school examinations, competitive exams, and undergraduate assessments.

Develop a clear, logical, and application-oriented understanding of Chemistry to excel academically and confidently tackle problem-based and conceptual questions at both school and UG levels.

Q. In an exothermic reaction at equilibrium, what effect does increasing the temperature have?
  • A. Shifts equilibrium to the right
  • B. Shifts equilibrium to the left
  • C. No effect on equilibrium
  • D. Increases the rate of the forward reaction
Q. In an exothermic reaction, what happens to the enthalpy of the system?
  • A. It increases.
  • B. It decreases.
  • C. It remains constant.
  • D. It becomes zero.
Q. In an isothermal process for an ideal gas, if the volume of the gas is doubled, what happens to the pressure?
  • A. It doubles
  • B. It halves
  • C. It remains constant
  • D. It quadruples
Q. In an isothermal process, which of the following statements is true?
  • A. The temperature remains constant.
  • B. The internal energy changes.
  • C. Work done is zero.
  • D. Heat transfer is zero.
Q. In an SN1 reaction, which step is rate-determining?
  • A. Formation of the carbocation
  • B. Nucleophilic attack
  • C. Deprotonation
  • D. Rearrangement
Q. In an SN2 reaction, what is the stereochemical outcome when the nucleophile attacks a chiral center?
  • A. Retention of configuration
  • B. Inversion of configuration
  • C. No change in configuration
  • D. Formation of a racemic mixture
Q. In an SN2 reaction, which of the following substrates would react the fastest with a nucleophile?
  • A. tert-butyl chloride
  • B. isopropyl bromide
  • C. ethyl chloride
  • D. methyl iodide
Q. In an S_N2 reaction, what is the stereochemical outcome when the substrate is a chiral center?
  • A. Retention of configuration
  • B. Inversion of configuration
  • C. Racemization
  • D. No stereochemical change
Q. In electrochemical cells, what does the salt bridge do?
  • A. Facilitates electron flow
  • B. Maintains charge balance
  • C. Increases reaction rate
  • D. Prevents gas buildup
Q. In electrochemical cells, what is the role of the cathode?
  • A. Site of oxidation
  • B. Site of reduction
  • C. Source of electrons
  • D. None of the above
Q. In electrochemical sensors, what is typically measured?
  • A. Current
  • B. Voltage
  • C. Resistance
  • D. Temperature
Q. In electrochemistry, what does the Nernst equation relate to?
  • A. Concentration and pressure
  • B. Temperature and volume
  • C. Cell potential and concentration
  • D. Mass and energy
Q. In electrochemistry, what does the term 'Faradaic current' refer to?
  • A. Current due to capacitive effects
  • B. Current due to non-Faradaic processes
  • C. Current associated with redox reactions
  • D. Current due to thermal effects
Q. In electrolysis, the substance that is reduced is found at the:
  • A. Anode
  • B. Cathode
  • C. Electrolyte
  • D. Separator
Q. In electrolysis, what happens to the ions in the electrolyte?
  • A. They remain unchanged.
  • B. They are oxidized or reduced at the electrodes.
  • C. They evaporate into gas.
  • D. They form a solid precipitate.
Q. In electrolysis, what is produced at the cathode?
  • A. Oxygen gas
  • B. Hydrogen gas
  • C. Metal ions
  • D. Salt
Q. In electrolysis, what occurs at the cathode?
  • A. Oxidation
  • B. Reduction
  • C. Neutralization
  • D. Decomposition
Q. In electrophoresis, what determines the direction of ion movement?
  • A. Molecular weight
  • B. Charge of the ion
  • C. Solubility
  • D. Temperature
Q. In electrophoresis, what factor primarily influences the migration speed of ions?
  • A. Ion concentration
  • B. Electric field strength
  • C. Temperature of the buffer
  • D. Size of the gel pores
Q. In electrophoresis, what property of ions is primarily utilized for separation?
  • A. Mass
  • B. Charge
  • C. Solubility
  • D. Size
Q. In electrophoresis, what property of ions primarily determines their movement?
  • A. Mass
  • B. Charge
  • C. Size
  • D. Solubility
Q. In electroplating, what is the purpose of the metal ions in the solution?
  • A. To provide a source of electrons
  • B. To deposit metal onto a surface
  • C. To increase conductivity
  • D. To act as a catalyst
Q. In flame tests, which color indicates the presence of sodium ions?
  • A. Green
  • B. Red
  • C. Yellow
  • D. Blue
Q. In flame tests, which color is produced by the presence of sodium ions?
  • A. Green
  • B. Red
  • C. Yellow
  • D. Blue
Q. In fuel cells, what is the role of the anode?
  • A. Oxidation of fuel
  • B. Reduction of oxygen
  • C. Storage of energy
  • D. Heat generation
Q. In gas chromatography, what is the role of the stationary phase?
  • A. To vaporize the sample
  • B. To separate components based on volatility
  • C. To provide a surface for interaction with analytes
  • D. To detect the components
Q. In gas chromatography, what is the stationary phase typically made of?
  • A. Liquid
  • B. Solid
  • C. Gas
  • D. Plasma
Q. In infrared spectroscopy, which functional group is typically identified by a strong peak around 1700 cm-1?
  • A. Alcohol
  • B. Aldehyde
  • C. Carboxylic acid
  • D. Ketone
Q. In infrared spectroscopy, which functional group would show a strong absorption around 1700 cm-1?
  • A. Alcohols
  • B. Aldehydes
  • C. Carboxylic acids
  • D. Ketones
Q. In IR spectroscopy, what does a broad peak around 3200-3600 cm-1 typically indicate?
  • A. Alkane C-H stretch
  • B. Aromatic C=C stretch
  • C. O-H stretch in alcohols
  • D. C=O stretch in ketones
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