Teacha
  • Courses
  • Mock Exams
  • For Tutors
  • For Schools
  • Pricing
Log InStart Free
  1. Past Questions
  2. /
  3. NDA
  4. /
  5. Chemistry
  6. /
  7. 2018/2019
  8. /
  9. Q27
Question 27

Which one of the following pairs of gases is the cause of occurrence of most of the explosion of mines?

  • A.Carbon dioxide and methane
  • B.Methane and Air
  • C.Oxygen and Acetylene
  • D.Hydrogen and Oxygen
Objective

Question details

Exam body
NDA
Subject
Chemistry
Year
2018/2019
Question no.
#27
Type
Objective
Previous · Q26The number of waves in n x 10th Bolur's Orbit are __. Next · Q28 The electronic configuration of excited carbon atom is __

More from this paper

  • Q23If d represents the density of a gas and k is a constant, the rate of gaseous…
  • Q24Graphite conducts electricity because ___.
  • Q25CO (g) + ½ O 2(g) → CO 2(g) ΔH = -285KJmol -1 . What is the energy change in…
  • Q29Which of the following processes is Iron being oxidized?
  • Q30The composition of gun powder is __.
  • Q31The graph above demonstrates the effect of ___.
See all Chemistry 2018/2019 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