Welcome to Schoolngr.com

Search SchoolNGR

Wednesday, 20 May 2026
Register . Login

Chemistry Past Questions and Answers

Chemistry Questions

Question 526:
JAMB 1987
An element Z, contained 90% of <sup style='font-size: smaller;'>16</sup><sub style='font-size: smaller;'>8</sub>Z and 10% of Z<sup style='font-size: smaller;'>18</sup><sub style='font-size: smaller;'>18</sub> its relative atomic mass is?
SchoolNGR Classroom
  • A 16.0
  • B 16.2
  • C 17.0
  • D 17.8
View Answer & Explanation
Question 527:
JAMB 1987
Use the option above to answer this question. Which is the correct set of results for tests conducted respectively on fresh lime juice and ethanol.
SchoolNGR Classroom
  • A A
  • B B
  • C C
  • D D
View Answer & Explanation
Question 528:
JAMB 1987
The times taken for iodine to be liberated in the reaction between sodium thiosulphate and hydrochloric acid at various temperature are as follows. These results suggest that
SchoolNGR Classroom
  • A For a 10<sup style='font-size: smaller;'>o</sup> rise in temperature, rate of reaction is double
  • B For a 10 <sup style='font-size: smaller;'>o</sup> rise in temperature, rate of reaction is halved
  • C Time taken for iodine to appear does not depend on temperature
  • D For a 10 <sup style='font-size: smaller;'>o</sup> rise in temperature rate of reaction is tripled
View Answer & Explanation
Question 529:
JAMB 1988
Which of the following statements is NOT correct?
SchoolNGR Classroom
  • A The average kinetic energy of a gas is directly proportional to its temperature
  • B At constant tempearture, the volume of a gas increases as the pressure increases
  • C The pressure of a gas is inversely proportional to its volume
  • D The temperature of a gas is directly proportional to its volume
  • E The collisions of molecules with each other are inelastic
View Answer & Explanation
Question 530:
JAMB 1988
Which of the following statements is NOT correct?
SchoolNGR Classroom
  • A The average kinetic energy of a gas is directly proportional to its temperature
  • B At constant tempearture, the volume of a gas increases as the pressure increases
  • C The pressure of a gas is inversely proportional to its volume
  • D The temperature of a gas is directly proportional to its volume
  • E The collisions of molecules with each other are inelastic
View Answer & Explanation

Stay Updated

Follow us on:


Subjects