Teacha
  • Courses
  • Mock Exams
  • For Tutors
  • For Schools
  • Pricing
Log InStart Free
  1. Past Questions
  2. /
  3. UNN
  4. /
  5. Chemistry
  6. /
  7. 2009/2010
  8. /
  9. Q11
Question 11

Which of the following ions is a pollution in drinking water even in trace quantities?

  • A.Ca2+
  • B.Pb2+
  • C.Mg2+
  • D.Fe3+
Objective

Question details

Exam body
UNN
Subject
Chemistry
Year
2009/2010
Question no.
#11
Type
Objective
Previous · Q10During the electrolysis of CuSO 4 solution using Platinum electrodes, which of… Next · Q12 The solubility of a salt of molar mass 100g at 20°C is 0.34mol/dm 3 . If 3.4g of…

More from this paper

  • Q7Which of the following has the lowest pH?
  • Q8Which of the following is an acid salt?
  • Q9CrO 2+ + 14H - + 6I ----> 2Cr 2+ + 3I 2 + 7H 2 O The change in the oxidation…
  • Q13Catalyst is important in chemical industry in that
  • Q14An alkanoic acid has a molecular mass of 88. Name the acid. (C = 12, O = 16, H =…
  • Q15Ethyne undergoes the following reactions except
See all Chemistry 2009/2010 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