Teacha
  • Courses
  • Mock Exams
  • For Tutors
  • For Schools
  • Pricing
Log InStart Free
  1. Past Questions
  2. /
  3. DELSU
  4. /
  5. Chemistry
  6. /
  7. 2011/2012
  8. /
  9. Q10
Question 10

The partial pressure of oxygen in a sample of air is 452mmHg and the total pressure is 780mmHg. What is the mole fraction oxygen?

  • A.0.203
  • B.0.579
  • C.2.030
  • D.5.790
Objective

Question details

Exam body
DELSU
Subject
Chemistry
Year
2011/2012
Question no.
#10
Type
Objective
Previous · Q9Which of the following metals is purified commercially by electrolysis? Next · Q11 The component of air that can be removed by alkaline pyrogallol solution is

More from this paper

  • Q5Which of the following is used to hasten the ripening of fruits?
  • Q6The maximum number of electrons in the L-shell of an atom is
  • Q7A solid substance with high melting and boiling points is likely to be a/an
  • Q8The advantage of detergent over soap is that detergent
  • Q12What quantity of aluminum is deposited when a current of 10A is passed througha…
  • Q13The mixture of gases used in photographer's flash tube is
See all Chemistry 2011/2012 questions
Teacha

Africa's learning & exam readiness platform. Built for students, tutors, and schools.

Platform

  • Courses
  • Mock Exams
  • Past Questions

For You

  • I'm a Tutor
  • I'm a School
  • Pricing

© 2025 Teacha. Built for African learners, tutors, and schools. Teacha is not affiliated with WAEC, NECO, or JAMB. All past questions are sourced from publicly available materials.

Privacy PolicyTerms of UseCookie Policy