1. What is the chemical name of
washing soda?
2. When sodium hydrogen carbonate is added to water, the hydrogen ion concentration decreases. What is the nature of the solution? Acidic or basic?
3. Write the chemical name and formula of bleaching powder.
2. When sodium hydrogen carbonate is added to water, the hydrogen ion concentration decreases. What is the nature of the solution? Acidic or basic?
3. Write the chemical name and formula of bleaching powder.
4. 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?
(b) Why does this milk take a long
time to set as curd?
5. Plaster of Paris should be stored
in a moisture proof container. Explain why?
6. What is a neutralization reaction?
Give two examples.
7. Explain how pH change in the river
water can endanger the lives of aquatic animals like fish.
8. What happens when (i)
plaster of Paris is heated to 473 K? (ii) Plaster of Paris is mixed with water?
9. Which gas is usually liberated
when an acid reacts with a metal? Illustrate with an example. How will you
test
for the presence of this gas?
10. Explain the pH change as the
cause of tooth decay. How can tooth decay caused by pH change be
prevented?
11. Name the raw material used for
the preparation of plaster of Paris. Write an equation to show the
reaction
between Plaster of Paris and water. What will happen if heating is not
controlled while preparing
plaster of Paris?
12. (i) Why are acids not stored in
meal containers? Containers made from which material are safe to store
acids.
(ii) Explain why dry hydrochloric
acid not conducts electricity but its aqueous solution conducts electricity.
(iii) Why are commercial samples of
bleaching powder not completely soluble in water?
Or
Write one activity to show the
reaction of acids with metal carbonates/bicarbonates salts.
13. (i) What is a salt?
(ii) Why aqueous solution of sodium
carbonate is basic in nature?
(iii)Why is an aqueous solution of
ammonium chloride acidic in nature?
14.(a) What is acid rain? How does it
affect our aquatic life?
(b)What happens during a bee sting?
What is its remedy?
(c)Two solutions X and Y are tested
with universal indicator. Solution X turns orange whereas solution Y
turns red.
Which of the solution is a stronger acid?
15. (i) Write the chemical names and
formula of bleaching powder.
(ii) Why does bleaching powder smell
of chlorine when exposed to air?
(iii) Write chemical equation to
represent the action of dilute hydrochloric acid on bleaching powder.
Solution
Solution
Searches related to 10th class Science Acid , Base
and salt
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Acid Bases And Salts Notes for class
X
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solved question Acid Bases And Salts
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