Chemistry
Solutions and pH Chemistry
451 Questions
Solutions and pH chemistry focus on the acidity or alkalinity of various substances, from human urine to acidic soils. Questions involve titration calculations, molarity determination, and understanding mole fractions. This topic is a staple in the chemistry sections of state and national level competitive exams.
Calculating solution molarityMole fraction calculationpH value interpretationAcidic soils and pHTitration and neutralization
Solutions and pH Chemistry Questions
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30 g of glucose is disolved in 100ml. of water
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30 ml of glucose is mixed in 1000 ml. of water
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30 ml of glucose is disolved in water so that the total volume is 100 ml.
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30 ml of glucose is mixed with 70 ml. of water
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more than 7
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less than 7
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equal to 7
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unpredictable
B
Correct answer
Explanation
On the pH scale, a pH of less than 7 is acidic.
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greater than the concentration of the hydroxide ions
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lesser than the concentration of the hydroxide ions
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equal to the concentration of the hydroxide ions
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sometime greater and sometime lesser
C
Correct answer
Explanation
In a neutralisation reaction equivalent amount of hydronium and hydroxide ions react in a solution to produce salt and water, so the concentration of H+ is always equal to the concentration of the hydroxide ions.
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pH = 8
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pH > 7
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pH < 7
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pH = - 8
C
Correct answer
Explanation
pH < 7, whatever you dilute the acid it never became basic
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about 10-10 m
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10 -9 - 10 -7 m
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greater than 10 -7 m
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none of these
A
Correct answer
Explanation
In a true solution, the size of solute particles is about 10-10 m.
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basic
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neutral
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acidic
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None of these
B
Correct answer
Explanation
The pH scale ranges from 0 to 14, where 7 is neutral. A pH value between 6.5 and 7.5 is very close to 7 and is generally classified as neutral in soil science and agriculture. Values significantly below 6.5 are acidic, and those significantly above 7.5 are basic.
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acidic
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alkaline
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neutral
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same as body fluid
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none of these
B
Correct answer
Explanation
The pH of human blood is slightly alkaline, typically maintained in a narrow range between 7.35 and 7.45.
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Gram atomic weight
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Gram molecular weight
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Gram molecular solution
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None of the above
C
Correct answer
Explanation
A solution containing one gram molecular weight (one mole) of solute in one litre of solution is defined as a molar solution. The term 'Gram molecular solution' is a synonym for a 1 Molar solution.
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6.5 - 7.5
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7.5 - 8
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8 - 8.5
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6 - 6.5
B
Correct answer
Explanation
The pH of human blood is tightly regulated and typically ranges between 7.35 and 7.45, which is slightly basic.
B
Correct answer
Explanation
Human blood is slightly alkaline, with a normal pH range typically between 7.35 and 7.45. Therefore, 7.5 is the closest value provided.
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sodium hydroxide.
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ammonium sulphate.
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sodium chloride.
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hydrogen chloride.
A
Correct answer
Explanation
A pH of 12 indicates a strongly basic solution. Sodium hydroxide (NaOH) is a strong base, while the others are either neutral or acidic.
A
Correct answer
Explanation
Hydrochloric acid is a strong acid, which means it completely dissociates in water to release a high concentration of hydrogen ions. A strong acid solution typically has a very low pH, usually between 0 and 2.
A
Correct answer
Explanation
For aquatic life to survive, the dissolved oxygen level in water should generally not fall below 4 mg/L.
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temperature of solution
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vapour pressure of solution
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acidity or basicity of solution
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ionic strength of solution
C
Correct answer
Explanation
The pH scale is a logarithmic measure of the concentration of hydrogen ions in a solution, indicating its acidity or basicity.