WAEC and NECO CBT Software for Computers and Laptops - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
Your School's Whatsapp Group - Join Us now

Chemistry Past Questions

Clear Selections
Change Subject Post a Question Check Syllabus Study My Bookmarks Past Questions Videos Watch Video Lessons Download App

WAEC and NECO CBT Software for Computers and Laptops - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
Your School's Whatsapp Group - Join Us now
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
1356
When excess ethanol is heated to 145 oC in the presence of concentrated sulphuric acid, the product is
  • A. diethyl ether
  • B. ethyne
  • C. diethyl sulphate
  • D. acetone
  • E. ethanoic acid
View Answer & Discuss (16) JAMB 1979
1357
Which of the following raw materials would be required from the smelting of iron ore in a blast furnace?
  • A. CaCO 3
  • B. Zn(NO3)2
  • C. CuSO4
  • D. AICI3
  • E. CaSO4
View Answer & Discuss (2) JAMB 1979
1358
A piece of metal (M) is dissolved in nitric acid and the resulting solution is treated with a small quantity of sodium hydroxide to produce a white precipitate (B) which redissolves on the addition of excess alkali. The precipitate (B)when ignited in a crucible produces the oxide of the metal(m). The METAL M is
  • A. Zn
  • B. Cu
  • C. Al
  • D. Au
  • E. Ca
View Answer & Discuss (13) JAMB 1979
WAEC and NECO CBT App for Mobile Devices - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
Post UTME Past Questions Agent
Your School's Whatsapp Group - Join Us now
1359

Pick out the correct statement

  • A. Zinc heated to redness reacts with steam to give oxygen and zinc oxide
  • B. Zinc heated to redness reacts with steam to give oxygen and hydrogen
  • C. Zinc does not react with hot or cold water
  • D. Zinc reacts with hot water to form zinc oxide and hydrogen
  • E. Zinc reacts very easily with cold water to give zinc oxide and hydrogen
View Answer & Discuss (19) JAMB 1979
1360

Consider the following exothermic reaction \(2SO_{2(g)} + O_{2(g)} = 2SO_{3(g)}\) . If the temperature of the reaction is reduced from 800ºC to 500ºC, and no other change takes place, then

  • A. the reaction rate increases
  • B. concentration of SO3 decreases
  • C. concentration of SO3 increases
  • D. SO2 gas becomes unreactive
  • E. O2 gas becomes unreactive
View Answer & Discuss (4) JAMB 1979
Start a Free Practice Test
 
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
Your School's Whatsapp Group - Join Us now
WAEC and NECO CBT Software for Computers and Laptops - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
Post UTME Past Questions Agent