Acids, Bases and Salts-How Strong Are Acid or Base Solutions? [CBSE (Central Board of Secondary Education) Class-10 (Term 1 & 2 MCQ) Science]: Questions 12 - 20 of 20
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Question 12
Explanation
A scale for measuring hydrogen ion concentration in a solution, called pH scale has been developed. The p in pH stands for ‘potenz’ in German, meaning power. So P = power and H = hydrogen ions.
Indicators – Indicators are substances which indicate the acidic or basic nature of the solution by their colour or odour change. Olfactory indicators are ra…
… (187 more words, 10 figures) …
Question 13
Question 14
Question 15
Question 16
Question 17
Question MCQ▾
Role played by in human digestive system:
Choices
Choice (4) | Response | |
---|---|---|
a. | Permits selective detection, identification and isolation of certain substances | |
b. | Help in digestion of food | |
c. | Enzyme function effectively only at certain | |
d. | Both b. and c. are correct |
Question 18
Question MCQ▾
of a solution means:
Choices
Choice (4) | Response | |
---|---|---|
a. | Negative logarithm of hydrogen ion concentration | |
b. | Strength of acidity of a solution | |
c. | Both a. and b. are correct | |
d. | None of the above |
Question 19
Question MCQ▾
The change in causes:
Choices
Choice (4) | Response | |
---|---|---|
a. | Tooth decay | |
b. | Less growth of plants | |
c. | Both a. and b. are correct | |
d. | Question does not provide sufficient data or is vague |
Question 20
Question MCQ▾
in everyday life is:
Choices
Choice (4) | Response | |
---|---|---|
a. | Self- defence by animals | |
b. | Self- defence by plants | |
c. | Animal and plants are sensitive | |
d. | All a., b. and c. are correct |