Teacha
  • Courses
  • Mock Exams
  • For Tutors
  • For Schools
  • Pricing
Log InStart Free
  1. Past Questions
  2. /
  3. UNN
  4. /
  5. Chemistry
  6. /
  7. 2005/2006 DAY 1
  8. /
  9. Q3
Question 3

3g of a mixture of CaO and CaCO3, was heated to a constant mass. If 0.44g of CO2 was liberated, calculate the percentage of CaO in the mixture

  • A.33.3%
  • B.50%
  • C.66.67%
  • D.25%
Objective

Question details

Exam body
UNN
Subject
Chemistry
Year
2005/2006 DAY 1
Question no.
#3
Type
Objective
Previous · Q2Two elements, X and Y, have atomic numbers 8 and 13 respectively. The formula… Next · Q4 An alkanoic acid has a molecular mass of 88. Its molecular formula is

More from this paper

  • Q1Which of the following is a mixture?
  • Q5If the rate of diffusion of oxygen is taken as 1cm 3 /s, what will be the rate…
  • Q6An increase in temperature causes an increase in the pressure of a gas in a…
  • Q7In electrolysis, the chemical reaction which takes place at the anode is
  • Q8In the electrolysis of brine, it is essential to prevent the mixing of the…
  • Q9In what way is equilibrium constant for the forward reaction related to that of…
See all Chemistry 2005/2006 DAY 1 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