Question 526:

• JAMB 1987

An element Z, contained 90% of ¹⁶₈Z and 10% of Z¹⁸₁₈ its relative atomic mass is?

A. 16.0
B. 16.2
C. 17.0
D. 17.8

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.

A. A
B. B
C. C
D. D

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

A. For a 10^o rise in temperature, rate of reaction is double
B. For a 10 ^o rise in temperature, rate of reaction is halved
C. Time taken for iodine to appear does not depend on temperature
D. For a 10 ^o rise in temperature rate of reaction is tripled

Question 529:

• JAMB 1988

Which of the following statements is NOT correct?

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

Question 530:

• JAMB 1988

Which of the following statements is NOT correct?

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