MCQs on Hydrogen Ion Concentration pH Scale and Buffer Solution
1. Range of pH scale is
(a) 7 to 10
(b) 0 to 10
(c) 0 to 14
(d) 7 to 14
Answer:::: (c)
2. Level of pH found in antacid solution
(a) ≤ 6.5
(b) ≥ 7.0
(c) > 10
(d) > 14
Answer:::: (b)
3. Three unknown solutions are given with pH value of 6, 8 & 9.5 respectively. Which solution will contain the maximum OH– ion?
(a) Solution sample-1
(b) Solution sample-2
(c) Solution sample-3
(d) Data are insufficient
Answer:::: (c)
4. pH of neutral salt is
(a) 7
(b) <7 (c) >7
(d) 0
Answer:::: (a)
5. Ammonium sulphate salt is
(a) basic salt
(b) acidic salt
(c) neutral salt
(d) complex salt
Answer:::: (a)
6. When sulphuric acid reacts with eggshell it produces
(a) hydrogen gas
(b) nitrogen gas
(c) carbon monoxide
(d) carbon dioxide gas
Answer:::: (d)
7. In the Chlor-alkali process, the by product gases are
(a) hydrogen only
(b) hydrogen and oxygen gas
(c) hydrogen and chlorine gas
(d) chlorine and nitrogen gas
Answer:::: (c)
8. The following salt is not hygroscopic in nature
(a) NaCl
(b) MgCl
(c) CaCl2
(d) KCl
Answer:::: (a)
9. When more and more water is diluted with acids its H+ ion concentration will
(a) increase
(b) decrease
(c) remains the same
(d) depends on the type of acids
Answer:::: (b)
10. When acids react with metal oxide it produces
(a) water and salt
(b) salts and hydrogen gas
(c) salts only
(d) no reaction takes place
Answer:::: (a)
