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 a redox titration, what is being measured?
  • A. The concentration of oxidizing or reducing agents
  • B. The temperature of the solution
  • C. The volume of gas produced
  • D. The solubility of the reactants
Q. In a reversible isothermal expansion of an ideal gas, what is the work done by the gas?
  • A. W = nRT ln(Vf/Vi)
  • B. W = nRT (Vf - Vi)
  • C. W = -PΔV
  • D. W = 0
Q. In a strong acid-strong base titration, what is the expected pH at the equivalence point?
  • A. 7
  • B. 3
  • C. 10
  • D. 14
Q. In a system at equilibrium, what is the effect of decreasing the volume of the container?
  • A. Shifts to the side with more moles of gas
  • B. Shifts to the side with fewer moles of gas
  • C. No effect
  • D. Increases the temperature
Q. In a titration curve, what does a steep slope indicate?
  • A. A weak acid or base
  • B. A strong acid or base
  • C. A neutral solution
  • D. A buffer solution
Q. In a titration curve, what does the steepest slope indicate?
  • A. The equivalence point
  • B. The endpoint
  • C. The initial pH
  • D. The final pH
Q. In a titration involving a strong acid and a strong base, what is the expected pH at the equivalence point?
  • A. 7
  • B. 3
  • C. 10
  • D. 0
Q. In a titration to determine the concentration of chloride ions, which indicator is typically used?
  • A. Phenolphthalein
  • B. Methyl Orange
  • C. Silver Nitrate
  • D. Chromate
Q. In a titration to determine the presence of acetic acid, which indicator would be most appropriate?
  • A. Phenolphthalein
  • B. Methyl orange
  • C. Bromothymol blue
  • D. Litmus
Q. In a titration to determine the presence of chloride ions, which indicator is most suitable?
  • A. Phenolphthalein
  • B. Methyl orange
  • C. Silver nitrate
  • D. Chromate
Q. In a titration to determine the presence of chloride ions, which indicator is typically used?
  • A. Phenolphthalein
  • B. Methyl Orange
  • C. Silver Nitrate
  • D. Potassium Chromate
Q. In a titration to identify chloride ions, which indicator is commonly used?
  • A. Phenolphthalein
  • B. Methyl orange
  • C. Silver nitrate
  • D. Chromate
Q. In a titration, what does the term 'analyte' refer to?
  • A. The solution of known concentration
  • B. The substance being analyzed
  • C. The indicator used
  • D. The equipment used
Q. In a titration, what is the endpoint?
  • A. The point where the titrant is added
  • B. The point where the reaction is complete
  • C. The point where the solution changes color
  • D. The point where the pH is neutral
Q. In a UV-Vis spectrum, what does a higher absorbance value indicate?
  • A. Lower concentration of the analyte
  • B. Higher concentration of the analyte
  • C. Presence of impurities
  • D. Increased solvent interference
Q. In a UV-Vis spectrum, what does a peak at 260 nm typically indicate?
  • A. Proteins
  • B. Nucleic acids
  • C. Lipids
  • D. Carbohydrates
Q. In a weak acid-strong base titration, what is the pH at the equivalence point?
  • A. Less than 7
  • B. Equal to 7
  • C. Greater than 7
  • D. Cannot be determined
Q. In a zero-order reaction, how does the concentration of reactant affect the rate?
  • A. Rate increases with concentration
  • B. Rate decreases with concentration
  • C. Rate is constant regardless of concentration
  • D. Rate is inversely proportional to concentration
Q. In a zero-order reaction, how does the concentration of the reactant affect the rate?
  • A. Rate is directly proportional to concentration
  • B. Rate is inversely proportional to concentration
  • C. Rate is independent of concentration
  • D. Rate is proportional to the square of concentration
Q. In a zero-order reaction, how does the concentration of the reactant change over time?
  • A. Linearly with time
  • B. Exponentially with time
  • C. Inversely with time
  • D. Remains constant
Q. In a zero-order reaction, how does the rate change with respect to the concentration of the reactant?
  • A. Rate increases
  • B. Rate decreases
  • C. Rate is constant
  • D. Rate is zero
Q. In a zero-order reaction, how does the rate of reaction change with respect to the concentration of the reactant?
  • A. Rate increases with concentration
  • B. Rate decreases with concentration
  • C. Rate is constant regardless of concentration
  • D. Rate is zero
Q. In an addition reaction involving alkenes, what is the product when HBr is added to propene?
  • A. 1-bromopropane
  • B. 2-bromopropane
  • C. Propyl bromide
  • D. Bromopropane
Q. In an addition reaction of HBr to an alkene, what is the major product when the alkene is asymmetric?
  • A. The product with the bromine on the more substituted carbon.
  • B. The product with the bromine on the less substituted carbon.
  • C. A racemic mixture of products.
  • D. No reaction occurs.
Q. In an E2 elimination reaction, what is the role of the base?
  • A. To donate a proton
  • B. To stabilize the carbocation
  • C. To act as a leaving group
  • D. To form a cyclic intermediate
Q. In an E2 elimination reaction, which of the following is a requirement for the reaction to occur?
  • A. A strong nucleophile
  • B. A good leaving group
  • C. A polar protic solvent
  • D. A tertiary substrate
Q. In an electrochemical cell, what is the anode?
  • A. Site of oxidation
  • B. Site of reduction
  • C. Site of electron gain
  • D. Site of ion formation
Q. In an electrophilic addition reaction of HBr to propene, what is the major product formed?
  • A. 1-bromopropane
  • B. 2-bromopropane
  • C. Propyl bromide
  • D. Bromopropane
Q. In an endothermic reaction, what happens to the enthalpy of the system?
  • A. Increases
  • B. Decreases
  • C. Remains constant
  • D. Fluctuates
Q. In an endothermic reaction, what is the sign of ΔH?
  • A. Positive
  • B. Negative
  • C. Zero
  • D. Undefined
Showing 211 to 240 of 1878 (63 Pages)
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