Chemistry

5.6. The drain cleaner, Drainex contains small bits of aluminium which react with caustic soda to produce dihydrogen. What volume of dihydrogen at 20 °C and one bar will be released when 0.15g of aluminium reacts?

5.5. Pressure of l g of an ideal gas A at 27°C is found to be 2 bar. When 2 g of another ideal gas B is introduced in the same flask at same temperature, the pressure becomes 3 bar. Find the relationship between their molecular masses.

5.3. Using the equation of state PV= nRT, show that at a given temperature, density of a gas is proportional to the gas pressure P.

7.5. Find out the value of K_c for each of the following equilibria from the value of K_p:
(i) 2NOCl (g) ?? 2NO (g) + Cl₂ (g); Kp= 1.8 × 10^–2 at 500 K

(ii) CaCO₃ (s) ? CaO (s) + CO₂(g); Kp= 167 at 1073 K       

7.3. At a certain temperature and total pressure of 10⁵Pa, iodine vapour contains 40% by volume of I atoms

I₂ (g) ? 2I (g)

Calculate K_p for the equilibrium. 

5.4. At 0°C, the density of a gaseous oxide at 2 bar is same as that of dinitrogen at 5 bar. What is the molecular mass of the oxide?

5.3. Using the equation of state PV= nRT, show that at a given temperature, density of a gas is proportional to the gas pressure P.

5.1. What will be the minimum pressure required to compress 500 dm³ of air at 1 bar to 200 dm³ at 30°C?

7.2. What is K_c for the following equilibrium when the equilibrium concentration of each substance is: [SO₂] = 0.60M, [O₂] = 0.82M and [SO₃] = 1.90 M?

2SO₂(g) + O₂(g) ? 2SO₃(g)