Podcast
Questions and Answers
What is the main product of the Wurtz reaction?
What is the main product of the Wurtz reaction?
What happens to ionization enthalpy as we move down a group in the periodic table?
What happens to ionization enthalpy as we move down a group in the periodic table?
Which oxidation state is associated with manganese in MnO4-?
Which oxidation state is associated with manganese in MnO4-?
What condition is necessary for a compound to be considered aromatic?
What condition is necessary for a compound to be considered aromatic?
Signup and view all the answers
What type of reaction involves the breaking down of a compound using heat?
What type of reaction involves the breaking down of a compound using heat?
Signup and view all the answers
What is the pH of a solution formed by mixing equal volumes of a strong acid with pH 6 and pH 4?
What is the pH of a solution formed by mixing equal volumes of a strong acid with pH 6 and pH 4?
Signup and view all the answers
Which hybridization occurs in PCl5?
Which hybridization occurs in PCl5?
Signup and view all the answers
Which statement is true regarding electron gain enthalpy?
Which statement is true regarding electron gain enthalpy?
Signup and view all the answers
What is the order of decreasing stability of the following cations: (I) CH3C+ HCH3, (II) CH3C+ HOCH3, and (III) CH3C+ HCOCH3?
What is the order of decreasing stability of the following cations: (I) CH3C+ HCH3, (II) CH3C+ HOCH3, and (III) CH3C+ HCOCH3?
Signup and view all the answers
Which law is exemplified by the reaction of gases where 45.4 L of dinitrogen reacts with 22.7 L of dioxygen to produce 45.4 L of nitrous oxide?
Which law is exemplified by the reaction of gases where 45.4 L of dinitrogen reacts with 22.7 L of dioxygen to produce 45.4 L of nitrous oxide?
Signup and view all the answers
What is the molarity of a solution prepared by dissolving 82.0 g of CaCl2 in enough water to make 812 mL of solution?
What is the molarity of a solution prepared by dissolving 82.0 g of CaCl2 in enough water to make 812 mL of solution?
Signup and view all the answers
What is the pH of a solution obtained by mixing 50 ml of 1 M HCl and 30 ml of 1 M NaOH?
What is the pH of a solution obtained by mixing 50 ml of 1 M HCl and 30 ml of 1 M NaOH?
Signup and view all the answers
What is the relationship expressed in the equation ∆U = ∆q + ∆W?
What is the relationship expressed in the equation ∆U = ∆q + ∆W?
Signup and view all the answers
What should be defined as 'x' in the process of determining equilibrium concentrations?
What should be defined as 'x' in the process of determining equilibrium concentrations?
Signup and view all the answers
Which of the following accurately describes the relationship between Gibbs energy and reaction spontaneity?
Which of the following accurately describes the relationship between Gibbs energy and reaction spontaneity?
Signup and view all the answers
What condition indicates that a reaction has achieved equilibrium?
What condition indicates that a reaction has achieved equilibrium?
Signup and view all the answers
What happens to the equilibrium constant K if the standard Gibbs energy ∆Gø is negative?
What happens to the equilibrium constant K if the standard Gibbs energy ∆Gø is negative?
Signup and view all the answers
What is the correct mathematical expression for Gibbs energy at equilibrium?
What is the correct mathematical expression for Gibbs energy at equilibrium?
Signup and view all the answers
How is the reaction quotient Q related to the equilibrium constant K at equilibrium?
How is the reaction quotient Q related to the equilibrium constant K at equilibrium?
Signup and view all the answers
What must be done if a quadratic equation is formed when solving for equilibrium concentrations?
What must be done if a quadratic equation is formed when solving for equilibrium concentrations?
Signup and view all the answers
Which statement is true about the effect of concentration changes on the value of the equilibrium constant K?
Which statement is true about the effect of concentration changes on the value of the equilibrium constant K?
Signup and view all the answers
What does it imply if ∆Gø > 0?
What does it imply if ∆Gø > 0?
Signup and view all the answers
Which principle is used to predict changes in equilibrium when conditions are altered?
Which principle is used to predict changes in equilibrium when conditions are altered?
Signup and view all the answers
What is the main objective in chemical synthesis as mentioned?
What is the main objective in chemical synthesis as mentioned?
Signup and view all the answers
How does the addition of a reactant affect an equilibrium system according to Le Chatelier’s principle?
How does the addition of a reactant affect an equilibrium system according to Le Chatelier’s principle?
Signup and view all the answers
What happens to the equilibrium constant Kc if the initial concentrations are altered?
What happens to the equilibrium constant Kc if the initial concentrations are altered?
Signup and view all the answers
What does a change in temperature do to an equilibrium system according to the principles discussed?
What does a change in temperature do to an equilibrium system according to the principles discussed?
Signup and view all the answers
In what way does a change in concentration affect an equilibrium mixture?
In what way does a change in concentration affect an equilibrium mixture?
Signup and view all the answers
How is ammonia primarily produced in the world?
How is ammonia primarily produced in the world?
Signup and view all the answers
Which of the following pairs of gases contains the same number of molecules?
Which of the following pairs of gases contains the same number of molecules?
Signup and view all the answers
For the reaction N2 + 3H2 ⇌ 2NH3 + heat, which expression correctly relates Kp and Kc?
For the reaction N2 + 3H2 ⇌ 2NH3 + heat, which expression correctly relates Kp and Kc?
Signup and view all the answers
What effect does increasing pressure have on the equilibrium position of the reaction N2 + 3H2 ⇌ 2NH3?
What effect does increasing pressure have on the equilibrium position of the reaction N2 + 3H2 ⇌ 2NH3?
Signup and view all the answers
What is the conjugate base of H2PO4?
What is the conjugate base of H2PO4?
Signup and view all the answers
Which of the following is not considered a Lewis acid?
Which of the following is not considered a Lewis acid?
Signup and view all the answers
Which alkene will give acetic acid upon oxidation with potassium permanganate?
Which alkene will give acetic acid upon oxidation with potassium permanganate?
Signup and view all the answers
What is the correct order of increasing size for the following species?
What is the correct order of increasing size for the following species?
Signup and view all the answers
Which statement correctly defines the ionization energy of an element?
Which statement correctly defines the ionization energy of an element?
Signup and view all the answers
What happens to the reaction if the reaction quotient Qc is less than the equilibrium constant KC?
What happens to the reaction if the reaction quotient Qc is less than the equilibrium constant KC?
Signup and view all the answers
According to Le-Chatelier's principle, what effect does adding heat have to a solid-liquid equilibrium if the reaction is endothermic?
According to Le-Chatelier's principle, what effect does adding heat have to a solid-liquid equilibrium if the reaction is endothermic?
Signup and view all the answers
What is the relationship between the equilibrium constant for a forward reaction and the equilibrium constant for its reverse reaction?
What is the relationship between the equilibrium constant for a forward reaction and the equilibrium constant for its reverse reaction?
Signup and view all the answers
What is a black body in terms of radiation?
What is a black body in terms of radiation?
Signup and view all the answers
What does Planck's equation E = hv represent?
What does Planck's equation E = hv represent?
Signup and view all the answers
What observation was made during Hertz's experiment regarding the photoelectric effect?
What observation was made during Hertz's experiment regarding the photoelectric effect?
Signup and view all the answers
What concept did Max Planck introduce to describe energy emission and absorption?
What concept did Max Planck introduce to describe energy emission and absorption?
Signup and view all the answers
What is the value of Planck's constant?
What is the value of Planck's constant?
Signup and view all the answers
Study Notes
Chemistry Exam - Class 11
-
General Instructions:
- 35 questions, internal choice available
- Section A: 19 multiple choice questions (1 mark each)
- Section B: 5 very short answer questions (2 marks each)
- Section C: 6 short answer questions (3 marks each)
- Section D: 2 case-based questions (4 marks each)
- Section E: 3 long answer questions (5 marks each)
- Use of log tables and calculators is not allowed
-
Section A (Multiple Choice):
- Question 1: 16 g of O₂ and 14 g of N₂ have the same number of molecules.
- Question 2: Kp = Kc (RT)¹ for N₂ + 3H₂ = 2NH₃ + heat
- Question 3: Increasing pressure increases the product in the reaction N₂ + 3H₂ → 2NH₃
-
Section A Further Questions:
- Question 4: Conjugate base of H₂PO₄⁻ is PO₄³⁻
- Question 5: NH₃ is not a Lewis acid
- Question 6: Hydrocarbon formula C₈H₁₀ with given hybridization (sp³, sp², sp², sp³, sp², sp², sp, sp)
- Question 7: CH₄ + Cl₂ → CH₃Cl + HCl is a substitution reaction.
- Question 8: CH₃-CH₂-Cl with alc.KOH → CH₃CHO
- Question 9: 2-Butene gives only acetic acid on oxidation with potassium permanganate
-
Section B (Very Short Answer):
- Question 10: Calculate average atomic mass of hydrogen using isotope data.
- Question 11: Calculate work done on ideal gas in compression
- Question 12: Predict stages of reaction based on Kc and Qc values
-
Section C (Short Answer):
- Question 12, OR: Difference between Mendeleev and Modern Periodic Law.
- Question 25 a, b, OR: Explanation of electronegativity increase/ionization enthalpy decrease trends.
-
Section D (Case-Based):
-
Section E (Long Answer):
- Question 29, OR: Define ionization enthalpy and electron gain enthalpy.
-
Question 30: Describe equilibrium reactions in relation to Qc and Kc, calculations for equilibrium concentrations.
- Calculate the equilibrium constant, Qc.
- Comparing Qc to Kc to determine the direction of the reaction (left to right, right to left, or at equilibrium)
- Question 31: Derive relationships and solve problems related to the equilibrium constants and Gibbs energy. (Details provided in OCR)
-
Additional Topics/Concepts:
- Calculations for pH, oxidation states, disproportionation, hybridisation
- Types of reactions (addition, elimination, substitution)
- Terms like Nucleophile, Electrophile and IUPAC nomenclature
- Principles like Le Chatelier's principle
- Law of Conservation of Mass (related to the problem mentioning the reaction, in which 45.4L of N2 and 22.7 L of O2 reacted)
- Mole fraction calculations
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
This quiz consists of 35 questions covering various topics in Chemistry for Class 11 students. It includes multiple choice questions, short answer questions, and long answer questions to assess your understanding of chemical concepts and equations. Prepare to put your knowledge to the test with internal choices available in the exam format.
