Thermodynamics (4 Marks) - Short Answer type Questions
1. State and explain Hess's law of constant heat summation. Explain with one example.
2. State the first law of thermodynamics. Explain its mathematical notation.
3. Explain the terms
a) Entropy b) Heat Capacity c) Enthalpy of formation and d) Enthalpy of combustion.
Very Short Answer type Questions
1. The equilibrium constant for a reaction is 10. What will be the value of ΔG(-)?
(R = 8.314 J.K.−1 mol−1, T = 300 K)
2. Given N2 (g) + 3 H2 (g) → 2 NH3 (g); ΔH° = -92.4 K.J. mol−1.
What is the standard enthalpy of formation of NH 3 gas?
3. State 2nd & 3rd laws of thermodynamics.
4. What are "extensive and intensive properties?"
5. Give the equation that gives the relationship between ΔU and ΔH.
Chemical Equilibrium and Acids - Bases (6 Marks)
Short Answer type Questions
1. Derive the relationship between kp and kc for the equilibrium reactions.
a) 2 SO2 (g) + O2 (g) 2 SO3 (g) and
b) N2 (g) + 3 H2 (g) 2 NH3 (g)
2. State Le Chatlier's principle. Discuss the principle for the industrial synthesis of NH3 (or SO3).
3. Explain Lewis Acid - Base theory with suitable examples.
4. Explain the concept of Bronsted acids and Bronsted bases.
5. What is "Salt Hydrolysis"? Aqueous solution of NH4Cl is acidic where as aqueous solution of CH3COONa is basic. Why? Explain.
6. Explain the following.
a) Common ion effect b) Solubility product
7. What are Buffer solutions? Classify with one example each.
Very Short Answer type Questions
1. Calculate pH of 0.05 M NaOH solution.
2. Concentration of Hydrogen ion is 3.8 × 10−3 M. What is its pH?
3. What is homogeneous equilibrium? Give two examples.
4. What is heterogeneous equilibrium? Give 2 examples.
5. What is the value of kw at room temperature? What are its units?
6. Define pH. Calculate the pH of 0.05 M Ba(OH)2 aqueous solution.
7. 50 ml of 1 M CH3COOH solution, when added to 50 ml of 0.5 M NaOH gives
a solution with pH value 'x'. Find the value of 'x'. (pka of acetic acid is 4.8)
8. The solubility of Ag2CrO4 is 1.3 × 10−4 mol L−1. What is the solubility product?
9. What is the pH of 10−8 M HCl?
10. kc for the reaction, N2 (g) + 3 H2 (g) 2 NH3 (g) is 0.5 at 400 K. Find kp.
Hydrogen and its compounds (4 Marks)
Short Answer type Questions
1. What is hardness of water? Write i) ion - exchange method ii) Calgon's method for the removal of permanent hardness of water.
2. Write few lines on the utility of Hydrogen as a fuel.
3. Write the chemical reactions to justify that hydrogen peroxide can function as oxidising as well as reducing agent.
4. Discuss with relevant chemical equations, various methods of preparing hydrogen peroxide.
5. Explain the terms
a) SYNGAS b) Coal gasification C) autoprotolysis and d) interstitial hydride.
Jr Inter Important Questions - 4 and 5 Chapters
Following are important questions from Inter first year Chemistry of AP Board.
States of Matter - Gases and Liquids (6 marks) - Short Answer type Questions
1. Write any four postulates of the kinetic molecular theory of gases.
2. Derive "Charles law" and "Graham's law" of diffusion from kinetic gas equation.
(Learn Boyle's Law and Dalton's Law also)
3. State and explain "Graham's law of diffusion".
360 cm3 of CH4 gas diffused through a porus membrane in 15 minutes. Under similar conditions, 120 cm3 of another gas diffused in 10 minutes. Find the molar mass of the gas.
4. State and explain Dalton's Law of partial pressures.
Very Short Answer type Questions
1. Calculate kinetic energy of 5 moles of N2 at 27°C.
2. What is "Boltzmann's constant?" Give its values.
3. Which of the gases diffuses faster among N2, O2 and CH4. Why?
4. Give the ratio of RMS, average and most probable speeds of gas molecules.
5. What is "surface tension"?
6. What is "coefficient of viscosity"? Give its units.
7. Find the rms, average and most probable speeds of O2 at 27°C.
Stoichemistry(6 Marks) - Short Answer type Questions
1. Chemical analysis of a carbon compund, gave the following percentage composition by weight of the elements present, Carbon = 10.06%, Hydrogen = 0.84%, Chlorine = 89.1%. Find the empirical formula of the compound.
2. A carbon compound contains 12.8% Carbon, 2.1% Hydrogen, 85.1% Bromine.
The molecular weight of the compound is 187.9. Find the molecular formula.
Very Short Answer type Questions
1. What volume of CO2 is obtained at STP by heating 4 g of CaCO3?
2. How many moles of glucose are present in 540 g of glucose?
3. The empirical formula of a compound is CH2O. Its molecular weight is 90. Find
the molecular formula of the compound.
4. Calculate the molarity of NaOH in the solution prepared by dissolving 4 g in enough water to form 250 ml of the solution.
5. Calculate the normality of oxalic acid containing 6.3 g of H2C2O4. 2 H2O in 500 ml of solution.
6. Calculate the volume of O2 at STP required to completely burn 100 ml of acetylene.
7. What is disproportionation reaction? Give one example.
8. Assign oxidation number of the underlined elements of the following species.
a) H4P2−O7 b) K2M−n O4
States of Matter - Gases and Liquids (6 marks) - Short Answer type Questions
1. Write any four postulates of the kinetic molecular theory of gases.
2. Derive "Charles law" and "Graham's law" of diffusion from kinetic gas equation.
(Learn Boyle's Law and Dalton's Law also)
3. State and explain "Graham's law of diffusion".
360 cm3 of CH4 gas diffused through a porus membrane in 15 minutes. Under similar conditions, 120 cm3 of another gas diffused in 10 minutes. Find the molar mass of the gas.
4. State and explain Dalton's Law of partial pressures.
Very Short Answer type Questions
1. Calculate kinetic energy of 5 moles of N2 at 27°C.
2. What is "Boltzmann's constant?" Give its values.
3. Which of the gases diffuses faster among N2, O2 and CH4. Why?
4. Give the ratio of RMS, average and most probable speeds of gas molecules.
5. What is "surface tension"?
6. What is "coefficient of viscosity"? Give its units.
7. Find the rms, average and most probable speeds of O2 at 27°C.
Stoichemistry(6 Marks) - Short Answer type Questions
1. Chemical analysis of a carbon compund, gave the following percentage composition by weight of the elements present, Carbon = 10.06%, Hydrogen = 0.84%, Chlorine = 89.1%. Find the empirical formula of the compound.
2. A carbon compound contains 12.8% Carbon, 2.1% Hydrogen, 85.1% Bromine.
The molecular weight of the compound is 187.9. Find the molecular formula.
Very Short Answer type Questions
1. What volume of CO2 is obtained at STP by heating 4 g of CaCO3?
2. How many moles of glucose are present in 540 g of glucose?
3. The empirical formula of a compound is CH2O. Its molecular weight is 90. Find
the molecular formula of the compound.
4. Calculate the molarity of NaOH in the solution prepared by dissolving 4 g in enough water to form 250 ml of the solution.
5. Calculate the normality of oxalic acid containing 6.3 g of H2C2O4. 2 H2O in 500 ml of solution.
6. Calculate the volume of O2 at STP required to completely burn 100 ml of acetylene.
7. What is disproportionation reaction? Give one example.
8. Assign oxidation number of the underlined elements of the following species.
a) H4P2−O7 b) K2M−n O4
Junior Inter Chemistry - Imp Questions from 1-3 Chapters
Following are important questions from Junior Intermediate Chemistry of AP Board. These are long answer type and short answer type questions.
1. ATOMIC STRUCTURE (8 Marks) - Long Answer type Questions
1. What are the postulates of Bohr's model of hydrogen atom? Give any two limitations of this model. Discuss the importance of this model to explain various series of line spectra in Hydrogen atom.
2. What are Quantum numbers? Explain the significance of quantum numbers.
2. CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES (8 Marks)
Long Answer type Questions
1. What are first and second Ionisation Enthalpy? Why I.E.2 > I.E.1 Explain four factors influencing Ionisation Enthalpy?
2. What is a periodic property? How the following properties vary in a group and in a period?
a) Atomic radius b) I.E. c) E.N. d) Nature of Oxides e) Electron gain enthalpy
3. Write an essay on s, p, d and f block elements.
3. CHEMICAL BONDING AND MOLECULAR STRUCTURE (8 Marks)
Long Answer type Questions
1. What do you understand by hybridization? Explain the different types of
hybridizations involving 's' and 'p' orbitals.
Short Answer type Questions
1. Give an account of VSEPR theory.
2. Explain sp3d hybridization with one example.
3. Explain sp3d2 hybridization with one example.
4. Explain the formation of coordinate covalent bond with two examples.
5. What is "Hydrogen bond"? Explain the different types of Hydrogen bonds with suitable examples.
6. Explain molecular orbital theory of oxygen molecule (& N2 molecule). Calculate its bond order and explain its magnetic property.
Very Short Answer type Questions
1. What is "Octet rule"?
2. Which of the two ions Ca+2 or Zn+2 is more stable and why?
3. How many sigma and pi bonds are present in
a) C2H2 and b) C2H4
4. If A and B are two different atoms when does AB molecule become covalent?
5. Boiling point of H2O is higher than HF. Why?
6. Why H2O has dipole moment while CO2 does not have?
7. Even though N in NH3 is in sp3 hybridizaiton, the HNH bond angle deviate from 109°28'. Why?
8. Define dipole moment.
9. NH3 has higher dipole moment compared to NF3. Why?
10. Be - F bonds are polar, but dipole moment of BeF2 is zero. Why?
1. ATOMIC STRUCTURE (8 Marks) - Long Answer type Questions
1. What are the postulates of Bohr's model of hydrogen atom? Give any two limitations of this model. Discuss the importance of this model to explain various series of line spectra in Hydrogen atom.
2. What are Quantum numbers? Explain the significance of quantum numbers.
2. CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES (8 Marks)
Long Answer type Questions
1. What are first and second Ionisation Enthalpy? Why I.E.2 > I.E.1 Explain four factors influencing Ionisation Enthalpy?
2. What is a periodic property? How the following properties vary in a group and in a period?
a) Atomic radius b) I.E. c) E.N. d) Nature of Oxides e) Electron gain enthalpy
3. Write an essay on s, p, d and f block elements.
3. CHEMICAL BONDING AND MOLECULAR STRUCTURE (8 Marks)
Long Answer type Questions
1. What do you understand by hybridization? Explain the different types of
hybridizations involving 's' and 'p' orbitals.
Short Answer type Questions
1. Give an account of VSEPR theory.
2. Explain sp3d hybridization with one example.
3. Explain sp3d2 hybridization with one example.
4. Explain the formation of coordinate covalent bond with two examples.
5. What is "Hydrogen bond"? Explain the different types of Hydrogen bonds with suitable examples.
6. Explain molecular orbital theory of oxygen molecule (& N2 molecule). Calculate its bond order and explain its magnetic property.
Very Short Answer type Questions
1. What is "Octet rule"?
2. Which of the two ions Ca+2 or Zn+2 is more stable and why?
3. How many sigma and pi bonds are present in
a) C2H2 and b) C2H4
4. If A and B are two different atoms when does AB molecule become covalent?
5. Boiling point of H2O is higher than HF. Why?
6. Why H2O has dipole moment while CO2 does not have?
7. Even though N in NH3 is in sp3 hybridizaiton, the HNH bond angle deviate from 109°28'. Why?
8. Define dipole moment.
9. NH3 has higher dipole moment compared to NF3. Why?
10. Be - F bonds are polar, but dipole moment of BeF2 is zero. Why?
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