1. A scale for measuring hydrogen ion concentration in a solution is called [ ]
a) Pauling scale b) pH scale c) Mulliken scale d) All
2. Identify the pH of a solution that turns blue litmus to red [ ]
a) 8 b) 4 c) 9 d) 10
3. The strength of acid or base depends on the concentration of [ ]
a) H3O+ b) OH–
c) Both a and b d) None
4. Which calcium compound does not increase the pH of acidic solids ? [ ]
a) Calcium carbonate b) Calcium hydroxide c) Calcium oxide d) Calcium sulphate
5. Who devised pH scale ? [ ]
a) Sorensen b) Bohr c) Sommerfeld d) Arrhenius4
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Answer:
1 ph scale
2.4
3OH-
4 CALCIUM CARBONATE
5 SORENSEN
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