Teacha
  • Courses
  • Mock Exams
  • For Tutors
  • For Schools
  • Pricing
Log InStart Free
  1. Past Questions
  2. /
  3. ABU
  4. /
  5. Chemistry
  6. /
  7. 2019/2020
  8. /
  9. Q7
Question 7

The oxidation state of calcium in CaCl2 is __________

  • A.+1
  • B.+2
  • C.+3
  • D.+4
Objective

Question details

Exam body
ABU
Subject
Chemistry
Year
2019/2020
Question no.
#7
Type
Objective
Previous · Q6What is the solubility of a salt X at 25°C if the saturated solution of the… Next · Q8 When air, which contains the gases: oxygen, nitrogen, carbon dioxide, water…

More from this paper

  • Q2A solution of sodium trioxocarbonate(IV)contains 10.6g in 250cm 3 of soluttion…
  • Q3The shape of the water molecule is
  • Q4The pH of four solutions W, X, Y, Z are 4, 6, 8, 10, respectively, therefore
  • Q5The process of converting start to ethanol is known as
  • Q9What mass of water is produced when 8.0g of hydrogen reacts with excess oxygen?…
  • Q10All the following will liberate a gas when reacted with dilute hydrochloric acid…
See all Chemistry 2019/2020 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