Acids, Bases and Salts Sample Questions for Class 7
Question 1
Which of the following has the greatest concentration of hydroxide ions?
A. 8
B. 10
C. 9
D. 8.1
Question 2
Which planet is known as the "Red Planet"?
A. Earth
B. Mars
C. Uranus
D. Venus
Question 3
What will happen to cells placed in an isotonic solution?
A. shrink
B. swell
C. neither shrink nor swell
Question 4
A substance with a pH of 2 is a .
A. strong acid
B. weak acid
C. strong base
D. weak base
Question 5
What is the most accurate way to see acidity or alkalinity?
A. blue litmus paper
B. red litmus paper
C. universal litmus paper
D. indicator