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. What is the mechanism of the nitration of benzene?
  • A. Electrophilic addition
  • B. Nucleophilic substitution
  • C. Electrophilic substitution
  • D. Radical substitution
Q. What is the mechanism of the reaction between 1-bromobutane and sodium hydroxide in ethanol?
  • A. SN1
  • B. SN2
  • C. E1
  • D. E2
Q. What is the mechanism of the reaction between an alkyl halide and a nucleophile in a bimolecular nucleophilic substitution (SN2)?
  • A. Nucleophile attacks from the back side, leading to inversion of configuration
  • B. Nucleophile attacks from the front side, leading to retention of configuration
  • C. Formation of a carbocation intermediate
  • D. Nucleophile attacks the halogen first
Q. What is the mechanism of the reaction between an alkyl halide and a nucleophile in a bimolecular nucleophilic substitution (SN2) reaction?
  • A. The nucleophile attacks the carbon from the opposite side of the leaving group.
  • B. The nucleophile attacks the carbon from the same side as the leaving group.
  • C. The reaction proceeds through a carbocation intermediate.
  • D. The reaction involves the formation of a cyclic intermediate.
Q. What is the mechanism of the reaction of 2-bromobutane with potassium cyanide?
  • A. SN1
  • B. SN2
  • C. E1
  • D. E2
Q. What is the molarity of a sodium hydroxide solution if 0.4 moles are dissolved in 2 liters of water?
  • A. 0.2 M
  • B. 0.4 M
  • C. 0.5 M
  • D. 0.8 M
Q. What is the molecular formula for 2,3-dimethylpentane?
  • A. C7H16
  • B. C8H18
  • C. C6H14
  • D. C5H12
Q. What is the molecular formula for 2-butyne?
  • A. C4H8
  • B. C4H6
  • C. C4H10
  • D. C4H12
Q. What is the molecular formula for 3-methyl-1-butyne?
  • A. C5H10
  • B. C5H8
  • C. C6H10
  • D. C6H12
Q. What is the molecular formula of 2,3-dimethylbutane?
  • A. C7H16
  • B. C6H14
  • C. C8H18
  • D. C5H12
Q. What is the molecular formula of 2-butyne?
  • A. C4H6
  • B. C4H8
  • C. C4H10
  • D. C4H4
Q. What is the molecular formula of the compound formed when hydrogen reacts with chlorine?
  • A. HCl
  • B. H2Cl2
  • C. Cl2H2
  • D. H3Cl
Q. What is the molecular geometry of a molecule with 2 bonding pairs and 2 lone pairs on the central atom?
  • A. Linear
  • B. Trigonal Planar
  • C. Tetrahedral
  • D. Bent
Q. What is the molecular geometry of a molecule with a trigonal bipyramidal electron geometry and one lone pair?
  • A. T-shaped
  • B. Linear
  • C. Trigonal planar
  • D. Octahedral
Q. What is the molecular geometry of CO2?
  • A. Linear
  • B. Bent
  • C. Trigonal Planar
  • D. Tetrahedral
Q. What is the molecular geometry of NH3?
  • A. Linear
  • B. Trigonal planar
  • C. Tetrahedral
  • D. Trigonal pyramidal
Q. What is the molecular geometry of PCl5?
  • A. Trigonal planar
  • B. Tetrahedral
  • C. Octahedral
  • D. Trigonal bipyramidal
Q. What is the molecular geometry of SF6?
  • A. Octahedral
  • B. Tetrahedral
  • C. Trigonal bipyramidal
  • D. Square planar
Q. What is the molecular geometry of sulfur hexafluoride (SF6)?
  • A. Octahedral
  • B. Tetrahedral
  • C. Trigonal bipyramidal
  • D. Square planar
Q. What is the molecular geometry of the sulfate ion (SO4^2-)?
  • A. Linear
  • B. Trigonal planar
  • C. Tetrahedral
  • D. Octahedral
Q. What is the Nernst equation for a half-reaction involving 2 electrons at 25°C?
  • A. E = E° - 0.059/n log(Q)
  • B. E = E° + 0.059/n log(Q)
  • C. E = E° - 0.0257/n log(Q)
  • D. E = E° + 0.0257/n log(Q)
Q. What is the Nernst equation used for calculating the cell potential under non-standard conditions?
  • A. E = E° - (RT/nF)ln(Q)
  • B. E = E° + (RT/nF)ln(Q)
  • C. E = E° - (nF/RT)ln(Q)
  • D. E = E° + (nF/RT)ln(Q)
Q. What is the Nernst equation used for in electrochemistry?
  • A. Calculating cell potential
  • B. Determining reaction rate
  • C. Measuring pH
  • D. Assessing temperature changes
Q. What is the net ionic equation for the reaction between H2SO4 and NaOH?
  • A. H+ + OH- -> H2O
  • B. Na+ + SO4^2- -> Na2SO4
  • C. H2SO4 + NaOH -> Na2SO4 + H2O
  • D. H2O -> H+ + OH-
Q. What is the order of a reaction if the rate law is given by rate = k[A]^2[B]?
  • A. 0
  • B. 1
  • C. 2
  • D. 3
Q. What is the oxidation state of chromium in potassium dichromate (K2Cr2O7)?
  • A. 0
  • B. +3
  • C. +6
  • D. +7
Q. What is the oxidation state of chromium in the complex ion [Cr(NH3)6]Cl3?
  • A. +2
  • B. +3
  • C. +4
  • D. +6
Q. What is the oxidation state of chromium in the complex [Cr(NH3)4Cl2]+?
  • A. +2
  • B. +3
  • C. +4
  • D. +6
Q. What is the oxidation state of chromium in the complex [Cr(NH3)6]Cl3?
  • A. +2
  • B. +3
  • C. +4
  • D. +6
Q. What is the oxidation state of hydrogen in HCl?
  • A. -1
  • B. 0
  • C. +1
  • D. +2
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