Science
Consider the pH value of the following acidic samples :
| S. No. | Sample | pH Value |
|---|---|---|
| 1. | Lemon Juice | 2.2 |
| 2. | Gastric Juice | 1.2 |
| 3. | Vinegar | 3.76 |
| 4. | Dil. Acetic acid | 3.0 |
The decreasing order of their H+ ion concentration is
- 3 > 4 > 1 > 2
- 2 > 1 > 3 > 4
- 2 > 1 > 4 > 3
- 3 > 4 > 2 > 1
Acids Bases Salts
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Answer
2 > 1 > 4 > 3
Reason — The number of H+ ion concentration determines the acidic strength of the sample. The pH and hydrogen ion concentration are inversely related i.e., as the value of pH increases, the H+ ion concentration decreases hence decreasing order of their H+ ion concentration is 2 > 1 > 4 > 3.
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Related Questions
Study the experimental set-up shown in given figure and choose the correct option from the following:
P Q Change observed in calcium hydroxide solution 1.K2CO3 Cl2 gas No change 2.KHCO3 CO2 gas No change 3.KHCO3 H2 gas Turns milky 4.K2CO3 CO2 gas Turns milky Which one of the following reactions is categorized as a thermal decomposition reaction?
- 2H2O (l) ⟶ 2H2(g) + O2 (g)
- 2AgBr(s) ⟶ 2Ag(s) + Br2(g)
- 2AgCl(s) ⟶ 2Ag(s) + Cl2(g)
- CaCO3(s) ⟶ CaO(s) + CO2(g)
The pair(s) which will show displacement reaction is/are
(i) NaCl solution and copper metal
(ii) AgNO3 solution and copper metal
(iii) Al2(SO4)3 solution and magnesium metal
(iv) ZnSO4 solution and iron metal
- (ii) only
- (ii) and (iii)
- (iii) and (iv)
- (i) and (ii)
Which one of the following structures correctly depicts the compound CaCl2?
