Average molecular weight of air is about ____________________?
Correct answer: B. 29
- A. 21
- B. 29
- C. 23
- D. 79
Explanation
Dry air is mainly nitrogen, with oxygen and small amounts of other gases; its composition gives a weighted average molecular weight of approximately 28.97. Hence the practical value used in calculations is 29.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
Practise Chemical Process Principles
2,710 free Chemical Process Principles MCQs from Chemical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemical Engineering questions like this
Chemical Engineering is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.
More Chemical Process Principles questions
If pH value of a solution is 8, then its pOH value will be ____________________?
The chemical nature of an element is independent of_______________________?
At room temperature, the product [H+] [OH-] in a solution is 10-14 moles/litre. If, [OH-] = 10-6 moles/litre, then the pH of the solution will be ________________________?
What fraction of the total pressure is exerted by oxygen, if equal weights of oxygen and methane are mixed in an empty vessel at 25°C ?
A very dilute solution is prepared by dissolving 'x1' mole of solute in 'x2' mole of a solvent. The mole fraction of solute is approximately equal to_________________?
Atomic ______________ of an element is a whole number?