Chemistry, 1987, JAMB Exam, Exam, Paper 1 | Objectives

Paper Info

Year :

1987

Title :

Chemistry

Exam :

JAMB Exam

Paper 1 | Objectives

31 - 34 of 34 Questions

#	Question	Ans
31.	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 Show Content Detailed Solution Mass number of Z = 16 while that of Z is 18 90 x 16 = 14.4 10 x 18 = 1.8 100 1 100 1 it relative atomic mass = 14.4 + 1.8 = 162	B
32.	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	A
33.	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	A
34.	The structure of benzoic acid is A. A B. B C. C D. D	D

31.	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 Show Content Detailed Solution Mass number of Z = 16 while that of Z is 18 90 x 16 = 14.4 10 x 18 = 1.8 100 1 100 1 it relative atomic mass = 14.4 + 1.8 = 162	B
32.	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	A

33.	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	A
34.	The structure of benzoic acid is A. A B. B C. C D. D	D