CHE1505 Assignment 03 2024

UNISA  2024  CHE1505-24-Y  Welcome Message  Assessment 3

QUIZ




Started on Friday, 28 June 2024, 5:16 PM
State Finished
Completed on Friday, 28 June 2024, 5:49 PM
Time taken 33 mins 30 secs


Question 1
Complete

Marked out of 2.00




A universal indicator can indicate the full range of pH values on the pH scale by
colour changes. Acid changes the colour of the universal indicator towards:


a. yellow, orange and red colours

b. yellow, green and blue colours

c. White, blue and black colours

d. green, blue and purple colours




Question 2
Complete

Marked out of 2.00




Whose definition of acids and bases emphasizes the role of an electron pair?


a. Lewis

b. Bronsted-Lowry

c. Faraday

d. Arrhenius




Question 3
Complete

Marked out of 2.00




Which of the following compounds cannot be Bronsted-Lowry bases?


a. NH3

b. NH4+ A
-
c. SH

d. H2O