March 6, 2014

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

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