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Class 10 Science Chapter 2 Assertion and Reason Questions - Acids, Bases and Salts

Q1:

Question for Assertion & Reason Type Questions: Acids, Bases and Salts
Try yourself:Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion: After white washing the walls, a shiny white finish on walls is obtained after two to three days.

Reason: Calcium Oxide reacts with Carbon dioxide to form Calcium Hydrogen Carbonate which gives shiny white finish.

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Q2:

Question for Assertion & Reason Type Questions: Acids, Bases and Salts
Try yourself:Assertion (A): When zinc is added to dilute hydrochloric acid, hydrogen is given off.

Reason (R): Hydrogen chloride molecules contain hydrochloric acid and hydrogen atoms

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Q3:

Question for Assertion & Reason Type Questions: Acids, Bases and Salts
Try yourself:Assertion (A): Gas bubbles are observed when sodium carbonate is added to dilute hydrochloric acid.

Reason (R): Carbon dioxide is given off in the reaction.

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Q4:

Question for Assertion & Reason Type Questions: Acids, Bases and Salts
Try yourself:Assertion (A): Ammonia solution is an alkali.

Reason (R): Ammonia solution turns blue litmus paper red.

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Q5:

Question for Assertion & Reason Type Questions: Acids, Bases and Salts
Try yourself:Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion (A): When common salt is kept open, it absorbs moisture from the air.

Reason (R): Common salt contains little magnesium chloride.

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Q6:

Question for Assertion & Reason Type Questions: Acids, Bases and Salts
Try yourself:Assertion (A): Baking soda creates acidity in the stomach.

Reason (R): Baking soda is alkaline.

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Q7:

Question for Assertion & Reason Type Questions: Acids, Bases and Salts
Try yourself:Assertion (A): Plaster of Paris is used by doctors for setting fractured bones.

Reason (R): When Plaster of Paris is mixed with water and applied around the fractured limbs, it sets into a hard mass.

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Q8:

Question for Assertion & Reason Type Questions: Acids, Bases and Salts
Try yourself:Direction: In the Following Questions, A Statement of Assertion (A) Is Followed by A Statement of Reason (R). Mark The Correct Choice As:

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.

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Q9:

Question for Assertion & Reason Type Questions: Acids, Bases and Salts
Try yourself:Assertion : On adding H2SO4 to water the resulting aqueous solution gets corrosive.

Reason: Hydronium ions are responsible for corrosive action.

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Q10:

Question for Assertion & Reason Type Questions: Acids, Bases and Salts
Try yourself:Assertion : Phenolphthalein gives pink colour in basic solution.

Reason : Phenolphthalein is a natural indicator.

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Q11:

Question for Assertion & Reason Type Questions: Acids, Bases and Salts
Try yourself:Assertion: HCl gas does not change the colour of dry blue litmus paper.

Reason: HCl gas dissolves in the water present in wet litmus paper to from H+ ions.

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Q12:

Question for Assertion & Reason Type Questions: Acids, Bases and Salts
Try yourself:Assertion : HCl produces hydronium ions (H3O+) and chloride ions (Cl-) in aqueous solution.

Reason : In presence of water, bases give H+ ions.

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Q13:

Question for Assertion & Reason Type Questions: Acids, Bases and Salts
Try yourself:Assertion: Sodium hydroxide reacts with zinc to produce hydrogen gas.

Reason : Acids react with active metals to produce hydrogen gas.

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Q14:

Question for Assertion & Reason Type Questions: Acids, Bases and Salts
Try yourself:Assertion : Ammonia solution is an alkali.

Reason : Ammonia solution turns blue litmus paper red.

View Solution

Q15:

Question for Assertion & Reason Type Questions: Acids, Bases and Salts
Try yourself:Assertion : To dilute the 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.

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