Teacha
  • Courses
  • Mock Exams
  • For Tutors
  • For Schools
  • Pricing
Log InStart Free
  1. Past Questions
  2. /
  3. UI
  4. /
  5. Chemistry
  6. /
  7. 2013/2014
  8. /
  9. Q21
Question 21

In which of the following is the entropy change positive?

  • A.Reaction between an acid and a base.
  • B.Addition of concentrated acid to water.
  • C.Dissolution of sodium metal in water.
  • D.Thermal dissociation of ammonium chloride
Objective

Question details

Exam body
UI
Subject
Chemistry
Year
2013/2014
Question no.
#21
Type
Objective
Previous · Q20Given the change of phase: CO 2 (g) changes to CO 2 (s), the entropy of the… Next · Q22 One of these elements is the best reducing agent.

More from this paper

  • Q17A charged car battery has energy that can be converted into another energy…
  • Q18Copper oxide is heated with charcoal to produce carbon monoxide and copper. The…
  • Q19For each oxygen atom in hydrogen peroxide which acts as an oxidant, there is an…
  • Q23The name of the gas driven off at the negative electrode during the electrolysis…
  • Q24The oxidation state of P in H 2 P 2 O 7 -2 is
  • Q25The oxidation state of S in Ca(HSO 3 ) 2 is ..........
See all Chemistry 2013/2014 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