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Acids, Bases and Salts EXERCISES Solutions
- Q1: A solution turns red litmus blue, its pH is likely to be
- Q2: A solution reacts with crushed egg-shells to give a gas that turns lime-water milky. The solution contains
- Q3: 10 mL of a solution of $NaOH$ is found to be completely neutralised by 8 mL of a given solution of $HCl$. If we take 20 mL of the same solution of $NaOH$, the amount $HCl$ solution (the same solution as before) required to neutralise it will be
- Q4: Which one of the following types of medicines is used for treating indigestion?
- Q5(a): Write word equations and then balanced equations for the reaction taking place when – (a) dilute sulphuric acid reacts with zinc granules.
- Q5(b): Write word equations and then balanced equations for the reaction taking place when – (b) dilute hydrochloric acid reacts with magnesium ribbon.
- Q5(c): Write word equations and then balanced equations for the reaction taking place when – (c) dilute sulphuric acid reacts with aluminium powder.
- Q5(d): Write word equations and then balanced equations for the reaction taking place when – (d) dilute hydrochloric acid reacts with iron filings.
- Q6: Compounds such as alcohols and glucose also contain hydrogen but are not categorised as acids. Describe an Activity to prove it.
- Q7: Why does distilled water not conduct electricity, whereas rain water does?
- Q8: Why do acids not show acidic behaviour in the absence of water?
- Q9(a): Five solutions $A, B, C, D$ and $E$ when tested with universal indicator showed pH as 4,1,11,7 and 9, respectively. Which solution is (a) neutral?
- Q9(b): Five solutions $A, B, C, D$ and $E$ when tested with universal indicator showed pH as 4,1,11,7 and 9, respectively. Which solution is (b) strongly alkaline?
- Q9(c): Five solutions $A, B, C, D$ and $E$ when tested with universal indicator showed pH as 4,1,11,7 and 9, respectively. Which solution is (c) strongly acidic?
- Q9(d): Five solutions $A, B, C, D$ and $E$ when tested with universal indicator showed pH as 4,1,11,7 and 9, respectively. Which solution is (d) weakly acidic?
- Q9(e): Five solutions $A, B, C, D$ and $E$ when tested with universal indicator showed pH as 4,1,11,7 and 9, respectively. Which solution is (e) weakly alkaline?
- Q9(f): Five solutions $A, B, C, D$ and $E$ when tested with universal indicator showed pH as 4,1,11,7 and 9, respectively. Arrange the pH in increasing order of hydrogen-ion concentration.
- Q10: Equal lengths of magnesium ribbons are taken in test tubes $A$ and $B$. Hydrochloric acid ($HCl$) is added to test tube $A$, while acetic acid ($CH_3COOH$) is added to test tube $B$. Amount and concentration taken for both the acids are same. In which test tube will the fizzing occur more vigorously and why?
- Q11: Fresh milk has a pH of 6. How do you think the pH will change as it turns into curd? Explain your answer.
- Q12(a): A milkman adds a very small amount of baking soda to fresh milk. (a) Why does he shift the pH of the fresh milk from 6 to slightly alkaline?
- Q12(b): A milkman adds a very small amount of baking soda to fresh milk. (b) Why does this milk take a long time to set as curd?
- Q13: Plaster of Paris should be stored in a moisture-proof container. Explain why?
- Q14: What is a neutralisation reaction? Give two examples.
- Q15: Give two important uses of washing soda and baking soda.
Chapters in CBSE - Class 10 Science
- Chemical Reactions and Equations
- Metals and Non-metals
- Carbon and its Compounds
- Life Processes
- Control and Coordination
- How Do Organisms Reproduce?
- Heredity and Evolution
- Light – Reflection and Refraction
- The Human Eye and the Colourful World
- Electricity
- Magnetic Effects of Electric Current
- Our Environment
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