Acid, Base And Salt
Time: 30 Minute
Questions and Answers
- 1.
In which one of the following solutions the bulb will not glow when electric current passed through it?
- A.
Tap water
- B.
Hydrochloric acid
- C.
Glucose solution
- D.
Dilute sulphuric acid
Correct Answer
C. Glucose solutionExplanation
Glucose solution will not conduct electricity and therefore the bulb will not glow when electric current is passed through it. This is because glucose is a non-electrolyte, meaning it does not dissociate into ions in solution. In contrast, tap water, hydrochloric acid, and dilute sulphuric acid are all electrolytes and will conduct electricity, allowing the bulb to glow when current is passed through them.Rate this question:
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- 2.
Guard tube containing anhydrous calcium chloride is used to
- A.
Absorb water from air
- B.
Absorb colored component
- C.
Absorb N2 from air
- D.
Absorb O2 from air
Correct Answer
A. Absorb water from airExplanation
The correct answer is "Absorb water from air". Anhydrous calcium chloride is a commonly used desiccant, meaning it has the ability to absorb moisture from the surrounding environment. By placing it in a guard tube, it can effectively remove water vapor from the air, preventing any moisture from reaching the desired substance or environment. This is particularly useful in applications where moisture can cause damage or interfere with processes, such as in laboratories or storage of sensitive materials.Rate this question:
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- 3.
Which of the following statements is correct about an aqueous solution of an acid and of a base? (i) Higher the pH, stronger the acid (ii) Higher the pH, weaker the acid (iii) Lower the pH, stronger the base (iv) Lower the pH, weaker the base
- A.
(i) and (iii)
- B.
(ii) and (iii)
- C.
(i) and (iv)
- D.
(ii) and (iv)
Correct Answer
C. (i) and (iv)Explanation
The pH scale measures the acidity or basicity of a solution. A lower pH value indicates a higher acidity, while a higher pH value indicates a higher basicity. Therefore, statement (i) is correct because a higher pH value corresponds to a weaker acid. On the other hand, statement (iv) is correct because a lower pH value corresponds to a stronger base.Rate this question:
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- 4.
Which of the following phenomena occur, when a small amount of acid is added to water? i. Ionisation ii. Neutralisation iii. Dilution iv. Salt formation
- A.
(i) and (ii)
- B.
(i) and (iii)
- C.
(ii) and (iii)
- D.
(ii) and (iv)
Correct Answer
B. (i) and (iii)Explanation
When a small amount of acid is added to water, two phenomena occur. Firstly, ionisation takes place where the acid molecules dissociate into ions in the water. This leads to the formation of hydronium ions (H3O+) and anions. Secondly, dilution occurs as the acid is mixed with water, resulting in a decrease in the concentration of the acid solution. Therefore, the correct answer is (i) and (iii).Rate this question:
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- 5.
In an attempt to demonstrate electrical conductivity through an electrolyte, the following apparatus (Given Figure) was set up. Which among the following statement(s) is(are) correct? i. Bulb will not glow because electrolyte is not acidic ii. Bulb will glow because NaOH is a strong base and furnishes ions for conduction. iii. Bulb will not glow because it depends upon the type of electrolytic solution
- A.
(i) and (iii)
- B.
(ii) and (i)
- C.
(ii) only
- D.
(iii) and (ii)
Correct Answer
C. (ii) onlyExplanation
The correct answer is (ii) only. This is because NaOH is a strong base and when it dissolves in water, it dissociates into ions (Na+ and OH-) which can conduct electricity. Therefore, the bulb will glow due to the presence of ions in the electrolyte. The acidity of the electrolyte does not affect the conductivity in this case.Rate this question:
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- 6.
Which of the following is(are) true when HCl (g) is passed through water? i. It does not ionise in the solution as it is a covalent compound. ii. It ionises in the solution iii. It gives both hydrogen and hydroxyl ion in the solution iv. It forms hydronium ion in the solution due to the combination of hydrogen ion with water molecule
- A.
(i) only
- B.
(iii) only
- C.
(ii) and (iv)
- D.
(iii) and (iv)
Correct Answer
C. (ii) and (iv)Explanation
When HCl (g) is passed through water, it ionizes in the solution, meaning it breaks apart into ions. This is because HCl is a strong acid and readily dissociates in water to form H+ ions. Additionally, it forms hydronium ions (H3O+) in the solution due to the combination of the H+ ions with water molecules. Therefore, the correct answer is (ii) and (iv).Rate this question:
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- 7.
10 ml of a solution of NaOH is found to be completely neutralized by 8 ml of a given solution of HCl. If we take 20 ml of the same solution of NaOH, the amount of HCL (the same solution as before) required to neutralize it will be –
- A.
4 ml
- B.
8 ml
- C.
12 ml
- D.
16 ml
Correct Answer
D. 16 mlExplanation
When 10 ml of NaOH solution is completely neutralized by 8 ml of HCl solution, it means that the two solutions have a 1:1 ratio of their respective moles. Therefore, the number of moles of NaOH in 10 ml is equal to the number of moles of HCl in 8 ml.
If we take 20 ml of the same NaOH solution, the number of moles of NaOH will be twice as much as before. To completely neutralize this amount of NaOH, we would need an equal number of moles of HCl. Since the ratio of moles is 1:1, we would need 16 ml of HCl solution (twice the amount of 8 ml) to neutralize the 20 ml of NaOH solution.Rate this question:
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- 8.
In the following reaction, identify the salt formed NH4OH(aq)+H2SO4(aqà----+2H2O(I)
- A.
NH4NO3
- B.
(NH4)2SO4
- C.
(NH4)3PO4
- D.
(NH4)2S
Correct Answer
B. (NH4)2SO4Explanation
When ammonium hydroxide (NH4OH) reacts with sulfuric acid (H2SO4), it forms water (H2O) and a salt. The salt formed in this reaction is (NH4)2SO4, also known as ammonium sulfate.Rate this question:
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- 9.
Identify the correct representation of reaction occurring during chloralkali process
- A.
2NaCl(l) + 2H2O(l) → 2NaOH(l) + Cl2(g) + H2(g
- B.
2NaCl(aq) + 2H2O(aq) → 2NaOH(aq) + Cl2(g) + H2(g)
- C.
2NaCl(aq) + 2H2O(l) → 2NaOH(aq) + Cl2(aq) + H2(aq)
- D.
2NaCl (aq) + 2H2O (l) → 2NaOH (aq) + Cl2(g) + H2(g)
Correct Answer
D. 2NaCl (aq) + 2H2O (l) → 2NaOH (aq) + Cl2(g) + H2(g)Explanation
The correct representation of the reaction occurring during the chloralkali process is 2NaCl (aq) + 2H2O (l) → 2NaOH (aq) + Cl2(g) + H2(g). This is because the reactants, sodium chloride (NaCl) and water (H2O), are both in aqueous form, indicating that they are dissolved in water. The products, sodium hydroxide (NaOH), chlorine gas (Cl2), and hydrogen gas (H2), are also indicated with their respective states of matter.Rate this question:
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- 10.
Which of the following statements is not correct?
- A.
All metal carbonates react with acid to give a salt, water and carbon dioxide
- B.
All metal oxides react with water to give salt and acid
- C.
Some metals react with acids to give salt and hydrogen
- D.
Some non metal oxides react with water to form an acid
Correct Answer
B. All metal oxides react with water to give salt and acidExplanation
The given correct answer is "All metal oxides react with water to give salt and acid." This statement is not correct because metal oxides react with water to form metal hydroxides, not salts and acids.Rate this question:
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- 11.
The following data were collected at the endpoint of a titration performed to find the molarity of an HCl solution. Volume of acid (HCl) used = 14.4 mL Volume of base (NaOH) used = 22.4 mL Molarity of standard base (NaOH) = 0.20 M What is the molarity of the acid solution?
- A.
1.6 M
- B.
0.64 M
- C.
0.31M
- D.
0.13M
Correct Answer
C. 0.31MExplanation
The molarity of the acid solution can be calculated using the formula: Molarity of acid x Volume of acid = Molarity of base x Volume of base. Plugging in the given values, we get: Molarity of acid x 14.4 mL = 0.20 M x 22.4 mL. Solving for the molarity of acid, we find that it is 0.31 M.Rate this question:
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- 12.
When HCl(aq) is exactly neutralized by NaOH(aq), the hydrogen ion concentration in the resulting mixture is
- A.
Always less than the concentration of the hydroxide ions
- B.
Always greater than the concentration of the hydroxide ions
- C.
Always equal than the concentration of the hydroxide ions
- D.
Sometimes greater and sometimes less than the concentration of the hydroxide ionsz
Correct Answer
C. Always equal than the concentration of the hydroxide ionsExplanation
When HCl(aq) is exactly neutralized by NaOH(aq), it forms water and a salt, NaCl. In this reaction, one H+ ion from HCl combines with one OH- ion from NaOH to form water. Since the reaction is stoichiometrically balanced, the number of H+ ions is equal to the number of OH- ions. Therefore, the hydrogen ion concentration in the resulting mixture is always equal to the concentration of the hydroxide ions.Rate this question:
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- 13.
Given the equation: H+ + OH- <-> H2O which type of reaction does the equation represent?
- A.
Esterification
- B.
Decomposition
- C.
Hydrolysis
- D.
Neutralization
Correct Answer
D. NeutralizationExplanation
The given equation represents a neutralization reaction. In a neutralization reaction, an acid (H+) reacts with a base (OH-) to form water (H2O). This type of reaction typically occurs when an acidic and basic solution are mixed together, resulting in the formation of a neutral solution.Rate this question:
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- 14.
A student wishes to prepare approximately 100 milliliters of an aqueous solution of 6M HCl using 12 M HCl. Which procedure is correct?
- A.
Adding 50 mL of 12 M HCl to 50 mL of water while stirring the mixture steadily
- B.
Adding 50 mL of 12 M HCl to 50 mL of water and then stirring the mixture steadily
- C.
Adding 50 mL of water to 50 mL of 12 M HCl while stirring the mixture steadily
- D.
Adding 50 mL of water to 50 mL of 12 M HCl and then stirring the mixture steadily
Correct Answer
A. Adding 50 mL of 12 M HCl to 50 mL of water while stirring the mixture steadilyExplanation
The correct procedure is to add 50 mL of 12 M HCl to 50 mL of water while stirring the mixture steadily. This is because when preparing a solution with a lower concentration, it is recommended to add the concentrated solution (12 M HCl) to the solvent (water) to avoid any potential splashing or spilling. By adding the concentrated solution slowly to the solvent, it allows for better mixing and ensures a more accurate and controlled dilution process.Rate this question:
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- 15.
One of the following does not inject and acidic liquid into the skin through its sting. This us :
- A.
Honey bee
- B.
Ant
- C.
Wasp
- D.
Nettle leaf hair
Correct Answer
C. WaspExplanation
Wasp is the correct answer because unlike honey bees and ants, wasps do not inject acidic liquid into the skin through their sting. Instead, wasps inject a venomous substance that causes pain and irritation. Nettle leaf hair is not a living organism and therefore does not have the ability to inject any substances into the skin.Rate this question:
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May 04, 2023Quiz Edited by
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Oct 29, 2013Quiz Created by
Tanmay Shankar
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