Free PDF Download of CBSE Class 10 Science Chapter 2 Acid Base and Salt Assertion Reason Questions for Class 10 Science. Assertion and Reason Questions for Class 10 Science with Answers were Prepared Based on the Latest Exam Pattern. Students can solve NCERT Class 10 Science Acid Base and Salt to know their preparation level.
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Acid-Base and Salt Class 10 Assertion Reason Questions
The following questions consist of two statements – Assertion (A) and Reason (R). Answer these questions by selecting the appropriate option given below:
(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
(b) If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
(c) If Assertion is correct but Reason is incorrect.
(d) If Assertion is incorrect but Reason is correct
Assertion: While dissolving an acid or base in water, the acids must always be added slowly to water with constant stirring.
Reason: Dissolving an acid on a base in water is a highly exothermic reaction
(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
Assertion: Phenolphthalein gives pink color in the basic solution.
Reason: Phenolphthalein is a natural indicator.
(c) Assertion (A) is true but reason (R) is false
Assertion: HCl gas does not change the color of dry blue litmus paper.
Reason: HCl gas dissolves in the water present in wet litmus paper to form H+ ions
(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
Assertion: H2CO3 is a strong acid.
Reason: A strong acid dissociates completely or almost completely in water
(d) Assertion (A) is false but reason (R) is true
Assertion: Sodium hydroxide reacts with zinc to produce hydrogen gas.
Reason: Acids react with active metals to produce hydrogen gas.
(b) If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
Assertion: Salts are the products of an acid-base reaction.
Reason: Salt may be acidic or basic
(b) If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
Assertion: Ammonia solution is an alkali.
Reason: Ammonia solution turns blue litmus paper red.
(c) Assertion (A) is true but reason (R) is false
Assertion: Weak acids have low electrical conductivity.
Reason: Strong acids and weak acids have equal concentration of hydrogen ions in their solutions
(c) Assertion (A) is true but reason (R) is false
Assertion: Baking soda creates acidity in the stomach.
Reason: Baking soda is alkaline.
(d) If Assertion is incorrect but Reason is correct
Assertion: During electrolysis of a concentrated aqueous solution of sodium chloride, hydrogen is produced at the anode and chlorine gas is produced at the cathode.
Reason: Ions get attracted to oppositely charged electrodes.
(d) If Assertion is incorrect but Reason is correct
Assertion: To dilute concentrated sulphuric acid water is added to the acid slowly.
Reason: A lot of heat energy will be given out in the dilution of concentrated sulphuric acid.
(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
Assertion: The aqueous solutions of glucose and alcohol do not show an acidic character.
Reason: Aqueous solutions of glucose and alcohol do not give H+ ions.
(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
Assertion (A): Acids turn blue litmus paper red.
Reason (R): Acids release hydrogen ions (H+) in water, which can react with the blue litmus paper, turning it red.
(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
Assertion (A): Bases turn red litmus paper blue.
Reason (R): Bases release hydroxide ions (OH-) in water, which can react with the red litmus paper, turning it blue.
(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
Assertion (A): The reaction between an acid and a base is called realization.
Reason (R): In a neutralization reaction, an acid and a base react to form salt and water.
(d) Assertion (A) is false but reason (R) is true
Assertion (A): Salts are ionic compounds formed from the neutralization of acids and bases.
Reason (R): In a neutralization reaction, the hydrogen ions (H+) from the acid combine with the hydroxide ions (OH-) from the base to form water, and the remaining ions combine to form a salt.
(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
Assertion (A): pH is a measure of the acidity or basicity of a solution.
Reason (R): pH is a logarithmic scale that represents the concentration of hydrogen ions (H+) in a solution.
(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
Assertion (A): Acidic solutions have a pH less than 7.
Reason (R): In acidic solutions, the concentration of hydrogen ions (H+) is greater than the concentration of hydroxide ions (OH-).
(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
Assertion (A): Basic solutions have a pH greater than 7.
Reason (R): In basic solutions, the concentration of hydroxide ions (OH-) is greater than the concentration of hydrogen ions (H+).
(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
Assertion (A): A strong acid completely ionizes in water to release hydrogen ions (H+).
Reason (R): Strong acids are highly reactive and readily dissociate into ions in water.
(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
Assertion (A): A weak base partially dissociates in water to release hydroxide ions (OH-).
Reason (R): Weak bases have a lower degree of ionization and do not completely dissociate into ions in water.
(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
Assertion (A): Acid rain can cause damage to buildings and statues made of marble or limestone.
Reason (R): Acid rain contains acidic pollutants that react with the calcium carbonate present in marble or limestone, leading to their erosion and degradation.
(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
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