41-What statement/s is/are correct regarding pH value?
| a. Higher the value of hydrogen ions lower will be its pH value.
b. As pH increases ,the concentration of OH– ions also increases. |
(A) Option a is correct
(B) Both a and b are correct
(C) Option b is correct
(D) None of the above
42- What is the value of neutral pH?
(A) 0
(B) 7
(C) 14
(D) 17
43- pH value range of human body work is …………..
(A) 8.00-12.00
(B) Less than 7
(C) 7.00-7.8
(D) None of the above
44- What is acid rain?
(A) Rain combines with lots of dirt and gases
(B) Rain combines with nitrogen oxide or hydrogen oxide
(C) Rain combines with sulphur oxide or nitrogen oxide.
(D) None of the above
45- pH value of acid rain is ……………
(A) Less than 5.6
(B) More than 7.5
(C) 7
(D) Less then 14
46-pH value of lemon juice is ………….
(A) About 7.4
(B) About 2.2
(C) About 10
(D) About 14
47- pH value of gastric Juice is……………
(A) About 2.2
(B) About 1.2
(C) About 1.1
(D) About 0.1
48- pH value of Milk of magnesia is…………….
(A) 7
(B) 8
(C) 9
(D) 10
49- pH value of sodium hydroxide solution is………………..
(A) About 12
(B) About 13
(C) About 14
(D) About 15
50-pH value of pure water or blood is………………..
(A) 7.4
(B) 2.3
(C) 1.2
(D) None of the above
ANSWERS:
41-(B), 42-(B), 43-(C), 44-(C), 45-(A), 46-(B), 47-(B), 48-(D), 49-(C), 50-(A)