Question 2
Marks : +2 | -2
Pass Ratio : 100%
A reaction has reactants 2 moles of NaOH and 1 mole of H2SO4, and products Na2SO4 and H2O, what are the total moles of products?
Explanation: Material Balance for Na: 2*1 = n1*2 => n1 = 1, for H: 2*1 + 1*2 = n2*2 => n2 = 2, => total moles of products = 1 + 2 = 3.
Question 6
Marks : +2 | -2
Pass Ratio : 100%
The equation of material balance, (Final condition + Sum of outputs) is equal to which of the following?
Explanation: Equation of material balance is Final condition – Initial condition = Sum of inputs – Sum of outputs, => Final condition + Sum of outputs = Initial condition + Sum of inputs.
Question 8
Marks : +2 | -2
Pass Ratio : 100%
In a random reaction 2 mole of CH4 and 1 mole of C2H4 are reacted, and 1 mole of C3H8 and 1 mole of CxHy are produced, what is x*y?
Explanation: Material balance for C: 2*1 + 1*2 =1*3 +1*x, => x = 1, for H: 2*4 + 1*4 = 1*8 + 1*y, => y = 4, => x*y = 4.
Question 9
Marks : +2 | -2
Pass Ratio : 100%
A combustion reaction has reactants 1 mole of CxHy and 2 moles of O2 and products 1 mole of CO2 and 2 mole of H2O, what is x + y?
Explanation: Moles of C, H and O in reactants = Moles of C, H and O in products, => C: 1*x = 1*1 => x = 1, H: 1*y = 2*2 => x + y = 5.