250+ TOP MCQs on Mole and Molecular Weight-IV and Answers

Chemical Process Calculation Multiple Choice Questions & Answers (MCQs) focuses on “Mole and Molecular Weight-IV”.

1-10. A bucket contains 48 gms of NaOH, 56 gms of H2O and 184 gms of H2SO4. (Molecular weights of the components are 40, 18 and 98 respectively)
1. How many moles of NaOH are there in the bucket?
a) 1.0
b) 1.2
c) 1.4
d) 1.6
Answer: b
Clarification: Number of moles = mass / molecular weight.

2. How many moles of H2SO4 are there in the bucket?
a) 1.44
b) 1.88
c) 2.44
d) 2.88
Answer: b
Clarification: Number of moles = mass / molecular weight.

3. How many moles of H2O are there in the bucket?
a) 3.1
b) 3.2
c) 3.3
d) 3.4
Answer: a
Clarification: Number of moles = mass / molecular weight.

4. What are the number moles of Oxygen present there in the bucket?
a) 14.82
b) 13.82
c) 12.82
d) 11.82
Answer: d
Clarification: Moles of Oxygen = Moles of NaOH + Moles of H2O + 4(Moles of H2SO4).

5. How many moles of Hydrogen are there in the bucket?
a) 11.00
b) 11.16
c) 11.56
d) 11.98
Answer: b
Clarification: Moles of H = Moles of NaOH + 2(Moles of H2O) + 2(Moles of H2SO4).

6. What is the weight percentage of H2O?
a) 19.44
b) 14.42
c) 12.56
d) 10.28
Answer: a
Clarification: Weight percentage = mass of the component / Total mass.

7. What is mole percentage of H2SO4?
a) 10.4
b) 20.4
c) 30.4
d) 40.4