please someone provide important MCQ of science class 10 life process and acid bases salt please
Answers
Answer:
1. Some fruits like mango, lemon, raw grapes, orange, etc., have a sour taste due to the presence of:
a. Acetic acid
b. Citric acid
c. Lactic acid
d. Oxalic acid
Answer. b. Citric acid
2. Zinc granules on treating with an acid X, form the zinc sulphate (ZnSO4) salt along with the evolution of a gas Y which burns with a pop sound when brought near to a burning candle. Identify the acid X and gas evolved Y.
a. X- Sulphuric acid and Y- Oxygen gas
b. X- Hydrochloric acid and Y- Oxygen gas
c. X- Sulphuric acid and Y- Hydrogen gas
d. X- Hydrochloric acid and Y- Hydrogen gas
Answer. c. X- Sulphuric acid and Y- Hydrogen gas
3. The figure given below represents the experiment carried out between conc. sulphuric acid and sodium chloride, which react with each other to form HCl gas.
Jagranjosh
Blue litmus paper is brought near the mouth of the delivery tube to check the presence of HCl acid but no change is observed in the color of litmus paper because:
a. The litmus paper used is dry
b. The litmus paper used is moist
c. Blue litmus paper does not change its color with an acid
d. The litmus paper is kept very close to the mouth of the delivery tube
Answer. a. The litmus paper used is dry
4. Which of the following phenomena occur, when a small amount of acid is added to water?
i. Ionisation
ii. Neutralisation
iii. Dilution
iv. Salt formation
(i) and (ii)
(i) and (iii)
(ii) and (iii)
(ii) and (iv)
Answer. b. (i) and (iii)
5. Which of the following indicators turn red in an acidic solution?
i. Phenolphthalein
ii. Litmus
iii. Turmeric
iv. Methyl orange
Choose the correct option:
(i) and (ii)
(ii) and (iii)
Only (ii)
(ii) and (iv)
Answer. d. (ii) and (iv)
6. Dilute acid does not produce carbon dioxide on being treated with:
a. Marble
b. Lime
c. Baking soda
d. Limestone
Answer. b. Lime
7. The sample of soil from a particular place was tested for its pH value. It came out to be 5. Which one of the following should be added to the soil to make it suitable for the plant growth?
i. Calcium chloride
ii. Calcium Hydroxide
iii. Calcium oxide
Choose the correct option:
Both (i) and (ii)
Both (ii) and (iii)
Only (i)
Only (iii)
Answer. b. Both (ii) and (iii)
An ant’s sting can be treated with …………which will neutralise the effect of the chemical injected by the ant’s sting into our skin.
Choose the correct option from the following to be filled in the blank space:
a. Methanoic acid
b. formic acid
c. Baking soda
d. Caustic soda
Answer. c. Baking soda
10. In the following reaction, identify the salt formed
NH4OH (aq) + H2SO4 (aq) → _____ + 2H2O (l)
a. NH4NO3
b. (NH4)2SO4
c. (NH4)3PO4
d. (NH4)2S
Answer. b. (NH4)2SO4
11. Which of the following salt will give acidic solution when dissolved in water?
a. NH4Cl
b. NaCl
c. Na2CO3
d. CH3COONa
Answer. a. NH4Cl
12. Bleaching powder is used as a disinfectant for water to:
a. Make water tastier
b. Remove all the dirt from water
c. Make water germ-free
d. Make water clear
Answer. c. Make water germ-free
13. Which among the following represents the chemical formula for ‘Plaster of Paris’?
Jagranjosh
14. Which one of the following salts will dissolve in water to form an alkaline solution?
a. Potassium carbonate
b. Sodium chloride
c. Sodium carbonate
d. Potassium sulphate
Answer. a. Potassium carbonate
15. Copper sulphate crystals when heated strongly, lose their water of crystallization to give anhydrous copper sulphate accompanied by a change in color from:
a. Blue to green
b. Blue to white
c. Blue to sky blue
d. Blue to grey
Answer. b. Blue to white
.
Explanation:
I couldn't give life process along with it as only 5000 characters can be added
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Class 10 Science MCQs Chapter 2 Acids Bases and Salts
1. What happens when a solution of an acid is mixed with a solution of a base in a test tube?
(i) Temperature of the solution decreases
(ii) Temperature of the solution increases
(in) Temperature of the solution remains the same
(iv) Salt formation takes place
(a) (i) and (iv)
(b) (i) and (iii)
(c) (ii) only
(d) (ii) and (iv)
Answer
Answer: d
2. When hydrogen chloride gas is prepared on a humid day, the gas is usually passed through the guard tube containing calcium chloride. The role of calcium chloride taken in the guard tube is to
(a) absorb the evolved gas
(b) moisten the gas
(c) absorb moisture from the gas
(d) absorb Cl– ions from the evolved gas
Answer/ Explanation
Answer: c
Explaination: Reason: Guard tube drys (absorbs water) from calcium chloride on a humid day.
3. Which one of the following salts does not con-tain water of crystallisation?
(a) Blue vitriol
(b) Baking soda
(c) Washing soda
(d) Gypsum
Answer
Answer: b
4. In terms of acidic strength, which one of the following is in the correct increasing order?
(a) Water < Acetic acid < Hydrochloric acid
(b) Water < Hydrochloric acid < Acetic acid
(c) Acetic acid < Water < Hydrochloric acid
(d) Hydrochloric acid < Water < Acetic acid
Answer
Answer: a
5. What is formed when zinc reacts with sodium hydroxide?
(a) Zinc hydroxide and sodium
(b) Sodium zincate and hydrogen gas
(c) Sodium zinc-oxide and hydrogen gas
(d) Sodium zincate and water
Answer/ Explanation
Answer: b
Explaination: Reason: Zn + 2NaOH → Ma2Zn02 (Sodium Zincate) + H2
6. Tomato is a natural source of which acid?
(a) Acetic acid
(b) Citric acid
(c) Tartaric acid
(d) Oxalic acid
Answer
Answer: d
7. Brine is an
(a) aqueous solution of sodium hydroxide
(b) aqueous solution of sodium carbonate
(c) aqueous solution of sodium chloride
(d) aqueous solution of sodium bicarbonate
Answer
Answer: c
8. Na2CO3 . 10H2O is
(a) washing soda
(b) baking soda
(c) bleaching powder
(d) tartaric acid
Answer
Answer: a
9. At what temperature is gypsum heated to form Plaster of Paris?
(a) 90°C
(b) 100°C
(c) 110°C
(d) 120°C
Answer
Answer: b
10. How many water molecules does hydrated cal-cium sulphate contain?
(a) 5
(b) 10
(c) 7
(d) 2
Answer/ Explanation
Answer: d
Explaination: Reason: Chemical formula of hydrated calcium sulphate or gypsum is CaSO4.2H2O
11. Sodium carbonate is a basic salt because it is a salt of a
(a) strong acid and strong base
(b) weak acid and weak base
(c) strong acid and weak base
(d) weak acid and strong base
Answer
Answer: d
12. Alkalis are
(a) acids, which are soluble in water
(b) acids, which are insoluble in water
(c) bases, which are insoluble in water
(d) bases, which are soluble in water
Answer
Answer: d
13. Which of the following statements is correct about an aqueous solution of an acid and of a base?
(i) Higher the pH, stronger the acid
(ii) Higher the pH, weaker the acid
(in) Lower the pH, stronger the base
(iv) Lower the pH, weaker the base
(a) (i) and (iii)
(b) (ii) and (iii)
(c) (i) and (iv)
(d) (ii) and (iv)
Answer/ Explanation
Answer: d
Explaination: Reason: Stronger the acid, lesser is the pH. Stronger the base, higher is the pH.
14. The apparatus given in the adjoining figure was set up to demonstrate electrical conductivity.
MCQ Questions for Class 10 Science Acids Bases and Salts with Answers 1
Which of the following statement(s) is (are) correct?
(i) Bulb will not glow because electrolyte is not acidic.
(ii) Bulb will glow because HCl is a strong acid and furnishes ions for conduction.
(iii) Bulb will not glow because circuit is incomplete.
(iv) Bulb will not glow because it depends upon the type of electrolytic solution.
(a) (i) and (iii)
(b) (ii) and (iv)
(c) (ii) only
(d) (iv) only
Answer
Answer: c
15. Lime water reacts with chlorine to give
(a) bleaching powder
(b) baking powder
(c) baking soda
(d) washing soda
Answer/ Explanation
Answer: c
Explaination:
MCQ Questions for Class 10 Science Acids Bases and Salts with Answers 2
16. Nettle sting is a natural source of which acid?
(a) MetiWanoic acid
(b) Lactic acid
(c) Citric acid
(d) Tartaric acid
Answer
Answer: a
17. Tooth enamel is made up of
(a) calcium phosphate
(b) calcium carbonate
(c) calcium oxide
(d) potassium
Answer
Answer: a
18. What is the pH range of our body?
(a) 7.0 – 7.8
(b) 7.2 – 8.0
(c) 7.0 – 8.4
(d) 7.2 – 8.4
Answer
Answer: a
19. Rain is called acid rain when its:
(a) pH falls below 7
(b) pH falls below 6
(c) pH falls below 5.6
(d) pH is above 7
Answer
Answer: c
20. Sodium hydroxide is a
(a) weak base
(b) weak acid
(c) strong base
(d) strong acid
Answer/ Explanation
Answer: c
Explaination: Reason: Sodium hydroxide ionises in water and produces a large amount of hydroxide ions.