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Acids Bases And Salts Class 10 MCQ
1. What is Salt?
a) Acid – Base
b) Base – Acid
c) Acid + Base
d) None
Answer: c
2. What happens when a solution of an acid is mixed with a solution of a base in a test tube?
a) Temperature of the solution decreases
b) Temperature of the solution increases
c) Temperature of the solution remains the same
d) None
Answer: b
3. Which of the following is the strongest hydracid known?
a) HCN
b) HClO4
c) HCl
d) HNO3
Answer: b
4. Water in case of HCl acts as a/an ___________, in case of ammonia acts as a/an ________
a) base, base
b) base, acid
c) acid, base
d) acid, acid
Answer: b
5. Which of the following is not a Lewis acid?
a) aluminium chloride
b) sodium ion
c) sulphur tetrafluoride
d) hydroxide ion
Answer: d
6. 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: c
7. 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: b
8. 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: a
9. 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: b
10. Tomato is a natural source of which acid?
a) Acetic acid
b) Citric acid
c) Tartaric acid
d) Oxalic acid
Answer: d
11. 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: c
12. Na2CO3 . 10H2O is
a) washing soda
b) baking soda
c) bleaching powder
d) tartaric acid
Answer: a
13. At what temperature is gypsum heated to form Plaster of Paris?
a) 90°C
b) 100°C
c) 110°C
d) 120°C
Answer: b
14. How many water molecules does hydrated calcium sulphate contain?
a) 5
b) 10
c) 7
d) 2
Answer: d
15. 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: d
16. 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: d
17. 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: d
18. Lime water reacts with chlorine to give
a) bleaching powder
b) baking powder
c) baking soda
d) washing soda
Answer: c
19. Nettle sting is a natural source of which acid?
a) MetiWanoic acid
b) Lactic acid
c) Citric acid
d) Tartaric acid
Answer: a
20. Tooth enamel is made up of
a) calcium phosphate
b) calcium carbonate
c) calcium oxide
d) potassium
Answer: a
21. 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: a
22. 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: c
23. Sodium hydroxide is a
a) weak base
b) weak acid
c) strong base
d) strong acid
Answer: c
24. An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change?
a) Baking powder
b) Lime
c) Ammonium hydroxide solution
d) Hydrochloric acid
Answer: d
25. When copper oxide and dilute hydrochloric acid react, colour changes to
a) white
b) bluish-green
c) blue-black
d) black
Answer: b
26. Sodium hydroxide is used
a) as an antacid
b) in manufacture of soap
c) as a cleansing agent
d) in alkaline batteries
Answer: b
27. Sodium hydroxide turns phenolphthalein solution
a) pink
b) yellow
c) colourless
d) orange
Answer: a
28. Chemical formula of washing soda is
a) Na2C03 . 7H2O
b) Na2C03 . 5H2O
c) Na2C03 . 2H2O
d) Na2C03 . 10H2O
Answer: d
29. Lewis concept does explain the behaviour of __________
a) bases
b) salts
c) protonic acids
d) amphoteric substances
Answer: c
30. Which of the following is a Lewis base?
a) ammonia
b) magnesium chloride
c) aluminium chloride
d) sodium ion
Answer: a
31. Which of the following substances cannot act as both acid as well as a base?
a) amphoteric substance
b) amphiprotic substance
c) ampholyte
d) protophilic
Answer: d
32. A strong acid has a ______________
a) weak conjugate acid
b) weak conjugate base
c) strong conjugate base
d) strong conjugate acid
Answer: b
33. A proton donor is a ____________ substance.
a) protongenic
b) protophilic
c) amphoteric
d) amphiprotic
Answer: a
34. HCl is an Arrhenius ___________
a) acid
b) base
c) salt
d) water
Answer: a
35. A solution turns red litmus blue, its pH is likely to be
a) 1
b) 4
c) 5
b) 10
Answer: d
Class 10 Science MCQ
| Chapter 1: Chemical reactions and equations | MCQs and Answers | Online Test |
| Chapter 2: Acids, bases and salt | MCQs and Answers | Online Test |
| Chapter 3: Metals and Non-metals | MCQs and Answers | Online Test |
| Chapter 4: Carbon and Its Compounds | MCQs and Answers | Online Test |
| Chapter 5: Periodic Classification Of Elements | MCQs and Answers | Online Test |
| Chapter 6: Life Processes | MCQs and Answers | Online Test |
| Chapter 7: Control and Coordination | MCQs and Answers | Online Test |
| Chapter 8: How do Organisms Reproduce? | MCQs and Answers | Online Test |
| Chapter 9: Heredity and Evolution | MCQs and Answers | Online Test |
| Chapter 10: Light Reflection and Refraction | MCQs and Answers | Online Test |
| Chapter 11: The Human Eye and Colourful World | MCQs and Answers | Online Test |
| Chapter 12: Electricity | MCQs and Answers | Online Test |
| Chapter 13: Magnetic Effects of Electric Current | MCQs and Answers | Online Test |
| Chapter 14: Sources of Energy | MCQs and Answers | Online Test |
| Chapter 15: Our Environment | MCQs and Answers | Online Test |
| Chapter 16: Sustainable Management of Natural Resources | MCQs and Answers | Online Test |
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