Acids, Bases and Salts Class 10 Worksheet with Answers

Definitions and general properties

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Definitions and general properties under Acids, Bases and Salts for Grade 10 CBSE.

Preview questions (no answers)

1.
$Curd cannot be stored in copper or brass vessels because:$
A. $It is basic$
B. $It reacts with the metal to form toxic salts$
C. $It turns into water$
D. $The vessel will melt$
2.
$The aqueous solution of sodium chloride is known as:$
A. $Baking soda$
B. $Bleach$
C. $Brine$
D. $Lime water$
3.
$Which salt is used in fire extinguishers?$
A. $Sodium carbonate$
B. $Sodium hydrogen carbonate$
C. $Sodium chloride$
D. $Calcium sulfate$
4.
$Vinegar contains which of the following acids?$
A. $Methanoic acid$
B. $Citric acid$
C. $Acetic acid$
D. $Lactic acid$
5.
$Which of the following sets of properties is characteristic of most bases (alkalis) in their aqueous state?$
A. $Sour taste, turns blue litmus red, pH less than 7$
B. $Bitter taste, turns red litmus blue, pH less than 7$
C. $Sour taste, turns red litmus blue, pH greater than 7$
D. $Bitter taste, turns red litmus blue, pH greater than 7$
6.
$H^{+}$
A. $OH^{-}$
B. $H_{2}$
C. $O^{2-}$
D. $H_{3}O^{+}$
7.
$A white fabric with a yellow turmeric stain turns reddish-brown when it comes into contact with a soap solution. This color change indicates that the soap solution is:$
A. $Acidic in nature$
B. $Basic in nature$
C. $Neutral in nature$
D. $Highly concentrated with salt$
8.
$CuSO_4 \cdot 5H_2O$
A. $Copper is reduced to copper(I).$
B. $It loses its water of crystallization.$
C. $It reacts with atmospheric oxygen.$
D. $CuO$
9.
$Which one of the following is not a base according to Arrhenius theory?$
A. $NaOH$
B. $KOH$
C. $NH_4OH$
D. $C_2H_5OH$
10.
$The pH of the gastric juices released during digestion is:$
A. $Less than 7$
B. $More than 7$
C. $Equal to 7$
D. $Equal to 0$

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Concept of pH scale

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Concept of pH scale under Acids, Bases and Salts for Grade 10 CBSE.

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Preview questions (no answers)

1.
$HCl$
A. $0$
B. $7$
C. $14$
D. $10$
2.
$Our body works within the pH range of:$
A. $2.0 to 3.0$
B. $7.0 to 7.8$
C. $5.0 to 6.0$
D. $9.0 to 10.0$
3.
$If the pH of a solution is 8, it is a:$
A. $Strong base$
B. $Weak base$
C. $Strong acid$
D. $Weak acid$
4.
$Which of the following is not an indicator used to find pH?$
A. $Universal indicator$
B. $pH paper$
C. $Methyl orange$
D. $Sodium chloride$
5.
$OH^-$
A. $OH^-$
B. $OH^-$
C. $OH^-$
D. $OH^-$
6.
$CO_2$
A. $H^+$
B. $H^+$
C. $H^+$
D. $H^+$
7.
$Tooth decay starts when the pH of the mouth falls below 5.5. Bacteria present in the mouth produce acids by the degradation of sugar and food particles. Based on the process shown in the diagram, which of the following substances would be most effective in neutralizing the produced acid and preventing decay?$
A. $Toothpaste (which is generally basic)$
B. $Lemon juice (which contains citric acid)$
C. $Vinegar (which contains acetic acid)$
D. $A soft drink (which contains carbonic acid)$
8.
$A solution of pH 9 is diluted 1000 times with water. The pH of the final solution will be:$
A. $6$
B. $12$
C. $Approximately 7$
D. $Exactly 8.5$
9.
$NaHSO_4$
A. $It is 7 because it is a salt$
B. $Na$
C. $H$
D. $It cannot be determined$
10.
$0.001 \text{ M } NaOH$
A. $3$
B. $11$
C. $7$
D. $10$

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Importance of pH in everyday life

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Importance of pH in everyday life under Acids, Bases and Salts for Grade 10 CBSE.

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Preview questions (no answers)

1.
$The pH scale was developed to measure the concentration of:$
A. $Oxygen ions$
B. $Hydrogen ions$
C. $Chlorine ions$
D. $Sodium ions$
2.
$H^+$
A. $pH 1$
B. $pH 5$
C. $pH 7$
D. $pH 10$
3.
$Tomato is a natural source of which acid?$
A. $Acetic acid$
B. $Citric acid$
C. $Tartaric acid$
D. $Oxalic acid$
4.
$Antacids react with excess acid in the stomach to produce salt and water. This is a ____ reaction.$
A. $Displacement$
B. $Decomposition$
C. $Neutralization$
D. $Combination$
5.
$NaOH$
A. $2$
B. $4$
C. $7$
D. $13$
6.
$Which of the following salts will give a basic solution when dissolved in water?$
A. $NaCl$
B. $KCl$
C. $Na_2CO_3$
D. $NH_4Cl$
7.
$Adding an acid to water is an ________ process.$
A. $Endothermic$
B. $Exothermic$
C. $Isothermal$
D. $Adiabatic$
8.
$H^+$
A. $0.01 mol/L$
B. $0.1 mol/L$
C. $2 mol/L$
D. $0.001 mol/L$
9.
$Which of the following is NOT a biological importance of pH?$
A. $Regulating the speed of light in the eye's vitreous humor$
B. $Maintaining blood homeostasis$
C. $Enabling enzyme activity in the stomach$
D. $Preventing tooth decay via saliva buffering$
10.
$The pH of a sample of coffee is 5.0. This means coffee is:$
A. $Mildly acidic$
B. $Strongly acidic$
C. $Mildly basic$
D. $Neutral$

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Preparation and uses of Sodium Hydroxide, Bleaching powder, Baking soda, Washing soda and Plaster of Paris

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Preparation and uses of Sodium Hydroxide, Bleaching powder, Baking soda, Washing soda and Plaster of Paris under Acids, Bases and Salts for Grade 10 CBSE.

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Preview questions (no answers)

1.
$What is the common name of Calcium Sulphate Hemihydrate?$
A. $Washing Soda$
B. $Baking Soda$
C. $Plaster of Paris$
D. $Bleaching Powder$
2.
$Tartaric acid is added to baking soda to ________ the bitter taste of the sodium carbonate formed.$
A. $Neutralize$
B. $Increase$
C. $Maintain$
D. $Double$
3.
$Which of these is used for bleaching wood pulp in paper factories?$
A. $Baking Soda$
B. $Bleaching Powder$
C. $Washing Soda$
D. $Plaster of Paris$
4.
$The 'Chlor' in Chlor-alkali process stands for:$
A. $Chlorate$
B. $Chlorine$
C. $Chloride$
D. $Chloroform$
5.
$Baking powder is a mixture containing baking soda and a mild edible acid like tartaric acid. If a baker mistakenly uses only baking soda to bake a cake, the cake will likely have a bitter taste. Which substance formed during heating is responsible for this bitterness?$
A. $Carbon dioxide$
B. $Water vapor$
C. $Sodium tartrate$
D. $Sodium carbonate$
6.
$A student adds a few drops of dilute sulphuric acid to a sample of bleaching powder in a test tube. A gas with a characteristic pungent smell is evolved. Identify the gas and the property of the bleaching powder it demonstrates.$
A. $Chlorine gas; it shows that bleaching powder contains available chlorine.$
B. $Oxygen gas; it shows that bleaching powder is a stable oxide.$
C. $Hydrogen gas; it shows that bleaching powder is an active metal.$
D. $Carbon dioxide gas; it shows that bleaching powder is a carbonate salt.$
7.
$During the electrolysis of brine, a base and two different gases are produced. If the base collected at the cathode reacts with the gas collected at the anode, a compound used as a common household bleaching agent is formed. Identify this compound.$
A. $CaOCl_2$
B. $NaCl$
C. $NaOCl$
D. $Na_2CO_3$
8.
$Which of the following compounds has the common name 'pearl ash' but is often confused with washing soda in industrial contexts?$
A. $Sodium Carbonate$
B. $Potassium Carbonate$
C. $Calcium Carbonate$
D. $Magnesium Carbonate$
9.
$Which of the following gases is liberated when bleaching powder is left in the open for a long time?$
A. $Oxygen$
B. $Carbon dioxide$
C. $Chlorine$
D. $Hydrogen$
10.
$CaCl_2$
A. $Ca(HCO_3)_2$
B. $CaCO_3$
C. $CaO$
D. $Ca(OH)_2$

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Define acids and bases using H+ and OH- ions and test them with indicators

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Define acids and bases using H+ and OH- ions and test them with indicators under Acids, Bases and Salts for Grade 10 CBSE.

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Preview questions (no answers)

1.
$CO_2$
A. $CaCO_3$
B. $Ca(OH)_2$
C. $Ca(HCO_3)_2$
D. $CaO$
2.
$Which of the following is used as an indicator to distinguish between an acid and a base?$
A. $Sodium chloride$
B. $Methyl orange$
C. $Calcium carbonate$
D. $Water$
3.
$What is the pH range of basic solutions?$
A. $0 to 7$
B. $Exactly 7$
C. $Above 7 to 14$
D. $Below 0$
4.
$Which gas is evolved when a base reacts with a metal like Zinc?$
A. $Oxygen$
B. $Hydrogen$
C. $Carbon dioxide$
D. $Nitrogen$
5.
$When a drop of an unknown solution is put on the pH paper, it turns dark red. The solution is likely to be:$
A. $Lemon juice$
B. $Sodium bicarbonate$
C. $Strong Hydrochloric acid$
D. $Ethanoic acid$
6.
$Which of the following observations is correct when dilute hydrochloric acid is added to iron filings?$
A. $Hydrogen gas and iron chloride are produced$
B. $Chlorine gas and iron hydroxide are produced$
C. $No reaction takes place$
D. $Iron salt and water are produced$
7.
$Which of the following is a weak base?$
A. $NaOH$
B. $KOH$
C. $NH_{4}OH$
D. $Ca(OH)_{2}$
8.
$Consider three solutions: A (pH 2), B (pH 7), and C (pH 12). Which of the following is correct regarding their hydrogen ion concentration?$
A. $H^+$
B. $H^+$
C. $H^+$
D. $H^+$
9.
$Which of the following is the best explanation for why distilled water does not conduct electricity, but rain water does?$
A. $Distilled water is hot, while rain water is cold.$
B. $CO_2$
C. $Distilled water is a compound, whereas rain water is an element.$
D. $Rain water contains more oxygen molecules than distilled water.$
10.
$A solution has a pH of 1. It is diluted 100 times. What will be the approximate new pH of the solution?$
A. $pH = 1.01$
B. $pH = 3$
C. $pH = 100$
D. $pH = 0.01$

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Explain pH scale, neutralisation, and importance of pH in daily life

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Explain pH scale, neutralisation, and importance of pH in daily life under Acids, Bases and Salts for Grade 10 CBSE.

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Preview questions (no answers)

1.
$On the pH scale, a value of 7 represents a neutral solution. Values from 0 to 7 represent _____ solutions and 7 to 14 represent _____ solutions.$
A. $basic, acidic$
B. $acidic, basic$
C. $neutral, acidic$
D. $basic, neutral$
2.
$Which of the following is the most acidic substance listed?$
A. $Saliva$
B. $Blood$
C. $Gastric juice$
D. $Milk$
3.
$If a farmer finds that the pH of the soil is 4.5, what is the nature of the soil?$
A. $Basic$
B. $Acidic$
C. $Neutral$
D. $Alkaline$
4.
$Which of these solutions will turn pH paper yellow-orange?$
A. $Lemon juice$
B. $Concentrated HCl$
C. $Sodium hydroxide$
D. $Water$
5.
$Which of the following is the most likely pH of the digestive juices in the small intestine, where pancreatic enzymes function best?$
A. $1.5 - 2.0$
B. $5.0 - 5.5$
C. $7.5 - 8.5$
D. $12.0 - 13.0$
6.
$Why does a person feel a stinging pain when an ant bites them?$
A. $The ant injects a basic solution into the skin.$
B. $The ant injects methanoic acid into the skin.$
C. $The ant removes the natural oils from the skin.$
D. $The ant injects a neutral salt that crystallizes in the skin.$
7.
$The pH of a sample of orange juice is expected to be in which range?$
A. $Between 2 and 4$
B. $Between 7 and 8$
C. $Between 10 and 12$
D. $Exactly 14$
8.
$H^+$
A. $[H^+]$
B. $[H^+]$
C. $[H^+]$
D. $[H^+]$
9.
$Which of the following would be the best way to determine the pH of a soil sample accurately in a lab?$
A. $Mix soil with distilled water, filter it, and test the filtrate with a pH probe or universal indicator.$
B. $Taste the soil to see if it is sour or bitter.$
C. $Drop a piece of zinc into the dry soil and measure the volume of hydrogen gas released.$
D. $Observe the color of the soil; darker soil is always more acidic.$
10.
$How does the 'Buffer system' in human saliva work to protect the teeth after a small pH drop?$
A. $H^+$
B. $NaOH$
C. $The saliva turns into a solid gel to coat the teeth and block the acid.$
D. $The saliva increases the temperature of the mouth to evaporate the acid.$

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Describe preparation and uses of NaOH, bleaching powder, baking soda, washing soda, and plaster of Paris

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Describe preparation and uses of NaOH, bleaching powder, baking soda, washing soda, and plaster of Paris under Acids, Bases and Salts for Grade 10 CBSE.

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Preview questions (no answers)

1.
$What is the common name of Calcium sulphate hemihydrate?$
A. $Gypsum$
B. $Bleaching powder$
C. $Plaster of Paris$
D. $Washing soda$
2.
$Which gas is evolved when washing soda is treated with an acid?$
A. $Hydrogen$
B. $Chlorine$
C. $Carbon dioxide$
D. $Oxygen$
3.
$The production of sodium hydroxide is called the 'chlor-alkali' process because the products are:$
A. $Chlorine and an acid$
B. $Chlorine and an alkali$
C. $Chlorine and water$
D. $Chlorine and salt$
4.
$Which salt is used in the manufacture of Borax?$
A. $Sodium hydroxide$
B. $Sodium carbonate$
C. $Sodium chloride$
D. $Sodium hydrogen carbonate$
5.
$Which of the following is the correct reaction showing the decomposition of baking soda upon heating?$
A. $2NaHCO_3 \rightarrow Na_2CO_3 + H_2O + CO_2$
B. $NaHCO_3 \rightarrow NaOH + CO_2$
C. $2NaHCO_3 \rightarrow Na_2O + 2CO_2 + H_2$
D. $NaHCO_3 + H_2O \rightarrow NaOH + H_2CO_3$
6.
$Na_2CO_3 \cdot 10H_2O$
A. $NaOH$
B. $It loses all water of crystallization to become soda ash$
C. $It converts into baking soda$
D. $It turns into liquid sodium carbonate$
7.
$The pH of an aqueous solution of baking soda is likely to be:$
A. $Exactly 7$
B. $Less than 7$
C. $Greater than 7$
D. $Zero$
8.
$What happens when Bleaching powder is treated with a large excess of water?$
A. $It forms a suspension of Calcium Hydroxide and releases Chlorine gas slowly.$
B. $It dissolves completely to form a clear solution of Calcium Chloride.$
C. $It explodes due to the rapid release of heat.$
D. $CO_2$
9.
$Which of the following statements about Baking Soda is FALSE?$
A. $It is a highly corrosive organic base.$
B. $It is used in the manufacture of baking powder.$
C. $It is used as an antacid to neutralize excess acid in the stomach.$
D. $It is used in soda-acid fire extinguishers.$
10.
$Cl_2 + 2NaOH \rightarrow NaCl + NaClO + H_2O$
A. $-1$
B. $-1$
C. $-1$
D. $+1$

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Acids, Bases and Salts

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Acids, Bases and Salts under Acids, Bases and Salts for Grade 10 CBSE.

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Preview questions (no answers)

1.
$H^+$
A. $pH increases$
B. $pH decreases$
C. $pH remains same$
D. $pH first increases then decreases$
2.
$Which of the following is used in the manufacturing of glass, soap, and paper?$
A. $Baking soda$
B. $Washing soda$
C. $Bleaching powder$
D. $Plaster of Paris$
3.
$In the reaction between an acid and a base, what is the role of the water produced?$
A. $It is a catalyst$
B. $It is a product of neutralization$
C. $It is a reactant$
D. $It is an indicator$
4.
$Which of the following salts is formed from a strong acid and a strong base?$
A. $NaCl$
B. $NH_4Cl$
C. $CH_3COONa$
D. $Na_2CO_3$
5.
$pH$
A. $pH < 7$
B. $pH = 7$
C. $pH = 7$
D. $pH > 7$
6.
$Follow the reaction sequence below. What is the nature of 'Solution S' formed in the final step?$
A. $Basic$
B. $Acidic$
C. $Neutral$
D. $Amphoteric$
7.
$pH$
A. $Solution Q is 3 times more acidic than solution P.$
B. $Solution P is 3 times more acidic than solution Q.$
C. $Solution P is 1000 times more acidic than solution Q.$
D. $Solution Q is 1000 times more acidic than solution P.$
8.
$NH_{3}$
A. $NaCl$
B. $NH_{4}Cl$
C. $NH_{4}Cl$
D. $NaHCO_{3}$
9.
$Which of the following is used in the 'Thermite process' after being treated with acid?$
A. $Iron oxide$
B. $Aluminium powder$
C. $Copper sulphate$
D. $Zinc granules$
10.
$Identify the salt that is produced by the reaction of a strong acid and a strong base.$
A. $Ammonium Chloride$
B. $Sodium Acetate$
C. $Sodium Nitrate$
D. $Sodium Carbonate$

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What Do All Acids and All Bases Have in Common

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What Do All Acids and All Bases Have in Common under Acids, Bases and Salts for Grade 10 CBSE.

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Preview questions (no answers)

1.
$HNO_3$
A. $OH^-$
B. $H^+$
C. $Na^+$
D. $Mg^{2+}$
2.
$If a solution turns red litmus paper blue, it most likely contains:$
A. $H^+$
B. $OH^-$
C. $Sugar$
D. $Distilled water$
3.
$Which substance will show acidic behavior only when dissolved in water?$
A. $HCl$
B. $Solid Glucose$
C. $Liquid Alcohol$
D. $Magnesium ribbon$
4.
$The ions responsible for the flow of current in a basic solution are:$
A. $Cl^-$
B. $Na^+$
C. $H^+$
D. $Electrons only$
5.
$A student conducts an experiment to test the electrical conductivity of various liquids. Based on the behavior of electrolytes (acids and bases) and non-electrolytes as shown in the flowchart, which pair of substances correctly fits Path 1 and Path 2 respectively?$
A. $C_2H_5OH$
B. $HNO_3$
C. $NaOH$
D. $C_6H_{12}O_6$
6.
$HX$
A. $HX = C_2H_5OH, X^- = H^+$
B. $HX = NaOH, X^- = Na^+$
C. $HX = HNO_3, X^- = NO_3^-$
D. $HX = C_6H_{12}O_6, X^- = OH^-$
7.
$If a student adds a few drops of concentrated acid to a test tube containing water, what will they observe?$
A. $The test tube becomes cold$
B. $The test tube becomes hot$
C. $The color of water changes to blue$
D. $A gas is evolved with a pop sound$
8.
$Ba(OH)_2$
A. $H_3O^+$
B. $Acids and bases are only acidic or basic when they are in gaseous form; mixing them in water causes them to reach a solid, non-conducting state.$
C. $The observation suggests that the common factor in acids and bases is the presence of the sulfate ion, which becomes inactive when it reacts with barium.$
D. $The conductivity falls because the reaction between any acid and any base is highly endothermic, and the loss of heat prevents ions from moving through the solution.$
9.
$NaCl$
A. $HNO_3$
B. $HNO_3$
C. $HNO_3$
D. $HNO_3$
10.
$pH$
A. $Increase$
B. $Decrease$
C. $Stay the same$
D. $Become 0$

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How Strong Are Acid Or Base Solutions

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How Strong Are Acid Or Base Solutions under Acids, Bases and Salts for Grade 10 CBSE.

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Preview questions (no answers)

1.
$Which of the following is the best way to prevent tooth decay after eating?$
A. $Eating more sugar$
B. $Rinsing with acid$
C. $Cleaning the mouth with toothpaste (basic)$
D. $Drinking lemon juice$
2.
$Ant sting contains which acid?$
A. $Lactic acid$
B. $Methanoic acid$
C. $Tartaric acid$
D. $Citric acid$
3.
$The pH of a sample of orange juice is 3.5. This means it is:$
A. $Basic$
B. $Neutral$
C. $Acidic$
D. $Highly alkaline$
4.
$OH^{-}$
A. $Increases$
B. $Decreases$
C. $Stays the same$
D. $Becomes zero$
5.
$A student measures the pH of two different solutions, P and Q, and records the results as shown in the diagram. Which of the following statements correctly describes the ion concentrations in these two solutions?$
A. $OH^-$
B. $OH^-$
C. $H^+$
D. $H^+$
6.
$What is the color of pH paper when dipped in a solution of baking soda?$
A. $Red$
B. $Orange$
C. $Blue-green$
D. $Yellow$
7.
$Which of the following salts will give a solution with pH less than 7 when dissolved in water?$
A. $NaCl$
B. $CH_3COONa$
C. $NH_4Cl$
D. $K_2SO_4$
8.
$NaOH$
A. $Increase$
B. $Decrease$
C. $Remain the same$
D. $Become 14$
9.
$OH^{-}$
A. $4$
B. $10$
C. $7$
D. $14$
10.
$In a titration of a strong acid with a strong base, what is the pH at the equivalence point?$
A. $pH 1$
B. $pH 7$
C. $pH 14$
D. $Dependent on concentration$

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More About Salts: Family of Salt, Chemicals from Common Salt

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More About Salts: Family of Salt, Chemicals from Common Salt under Acids, Bases and Salts for Grade 10 CBSE.

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Preview questions (no answers)

1.
$NaOH$
A. $Baking soda$
B. $Caustic soda$
C. $Washing soda$
D. $Bleaching powder$
2.
$Sodium carbonate is a _______ salt.$
A. $Acidic$
B. $Basic$
C. $Neutral$
D. $Amphoteric$
3.
$Which of the following is used for bleaching wood pulp in paper factories?$
A. $Baking soda$
B. $Washing soda$
C. $Bleaching powder$
D. $Common salt$
4.
$The chemical name of baking soda is:$
A. $Sodium carbonate$
B. $Sodium hydrogen carbonate$
C. $Sodium hydroxide$
D. $Sodium chloride$
5.
$In the production of washing soda, which intermediate compound is formed that is subsequently heated?$
A. $Sodium chloride$
B. $Sodium hydrogencarbonate$
C. $Ammonium chloride$
D. $Calcium carbonate$
6.
$Which of the following salts is known as 'Blue Vitriol'?$
A. $FeSO_{4} \cdot 7H_{2}O$
B. $CuSO_{4} \cdot 5H_{2}O$
C. $Na_{2}CO_{3} \cdot 10H_{2}O$
D. $MgSO_{4} \cdot 7H_{2}O$
7.
$Calcium Oxychloride is another name for:$
A. $Baking Soda$
B. $Washing Soda$
C. $Bleaching Powder$
D. $Plaster of Paris$
8.
$Which product of the chlor-alkali process is used as a fuel and in the manufacture of ammonia for fertilizers?$
A. $Chlorine$
B. $Sodium hydroxide$
C. $Hydrogen$
D. $Hydrochloric acid$
9.
$CaSO_{4} \cdot \frac{1}{2} H_{2}O + 1\frac{1}{2} H_{2}O \rightarrow X$
A. $CaSO_{4} \cdot 2H_{2}O$
B. $CaSO_{4}$
C. $CaO$
D. $Ca(OH)_{2}$
10.
$What is the purpose of adding gypsum to cement during manufacturing?$
A. $To speed up the setting process$
B. $To slow down the setting process$
C. $To provide a white color to cement$
D. $To increase the strength of cement$

Download the worksheet for Acids, Bases and Salts - More About Salts: Family of Salt, Chemicals from Common Salt to practice offline. It includes additional chapter-level practice questions.

Acids, Bases and Salts

Definitions and general properties

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Concept of pH scale

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Importance of pH in everyday life

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Preparation and uses of Sodium Hydroxide, Bleaching powder, Baking soda, Washing soda and Plaster of Paris

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Define acids and bases using H+ and OH- ions and test them with indicators

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Explain pH scale, neutralisation, and importance of pH in daily life

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Describe preparation and uses of NaOH, bleaching powder, baking soda, washing soda, and plaster of Paris

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Acids, Bases and Salts

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What Do All Acids and All Bases Have in Common

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How Strong Are Acid Or Base Solutions

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More About Salts: Family of Salt, Chemicals from Common Salt

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