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CBSE - Class 10 Science Acids, Bases and Salts Worksheet

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?

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?

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?

A solution reacts with crushed egg-shells to give a gas that turns lime-water milky. The solution contains

a. (a) NaCl b. (b) HCl c. (c) LiCl d. (d) KCl

Plaster of Paris should be stored in a moisture-proof container. Explain why?

Which of following set of substances contain acids?

grapes, lime water

vinegar, soap

curd, milk of magnesium

curd, vinegar

A solution turns red litmus blue, its pH is likely to be

(d) 10

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?

Litmus a natural dye is an extract of

china rose

beetroot

lichen

blue berries

10.

Write word equations and then balanced equations for the reaction taking place when – (b) dilute hydrochloric acid reacts with magnesium ribbon.

11.

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?

12.

Fresh milk has a pH of 6. How do you think the pH will change as it turns into curd? Explain your answer.

13.

Why does distilled water not conduct electricity, whereas rain water does?

14.

Write word equations and then balanced equations for the reaction taking place when – (a) dilute sulphuric acid reacts with zinc granules.

15.

The correct way of making a solution of acid in water is to

add water to acid

add acid to water

mix acid and water simultaneously

add water to acid in a shallow container

16.

Lemon water is basic in nature

a. True b. False

17.

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

a. (a) 4 mL b. (b) 8 mL c. (c) 12 mL d. (d) 16 mL

18.

Compounds such as alcohols and glucose also contain hydrogen but are not categorised as acids. Describe an Activity to prove it.

19.

Phenolphthalein is a synthetic indicator and its colours on acidic and basic solution, respectively are

red and blue

blue and red

pink and colourless

colourless and pink

20.

Give two important uses of washing soda and baking soda.

Worksheet Answers

Option D

Option C

15.

Option B

16.

Option B

17.

19.

Option D

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