Teacha
  • Courses
  • Mock Exams
  • For Tutors
  • For Schools
  • Pricing
Log InStart Free
  1. Past Questions
  2. /
  3. RSUT
  4. /
  5. Chemistry
  6. /
  7. 2011/2012
  8. /
  9. Q10
Question 10

An aqueous solution of a crystalline salt reacts with dilute HCl to give a yellow precipitate and a gas that turned dichromate paper green. The crystalline salt may be

  • A.Na2S2O3.5H2O
  • B.Na2CO3.10H20
  • C.Na2S
  • D.NaHCO3
Objective

Question details

Exam body
RSUT
Subject
Chemistry
Year
2011/2012
Question no.
#10
Type
Objective
Previous · Q9An electron described by the quantum number, n = 4, L = 3 can be located in what…

More from this paper

  • Q3The basic tenet of valence bond electron pair repulsion theory is that the pairs…
  • Q4A chemical equilibrium is established when
  • Q5Oxygen is extracted from water by
  • Q6Excess ethanol was soaked with 3g of pure oxygen in a combustion chamber. How…
  • Q740g of sodium nitrate were. If the solubility of the salt is 10.50 mol/dm 3 at…
  • Q8The energy for the dissociation of molecule AB in kJ in the diagram of energy…
See all Chemistry 2011/2012 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