Class 10th Science Chapter – 4 Carbon and Its Compounds MCQ With Answers

September 22, 2023

Class 10th Science Chapter – 4 Carbon and Its Compounds

Textbook	NCERT
Class	10^th
Subject	Science
Chapter	4^th
Chapter Name	Carbon and Its Compounds
Category	Class 10th Science
Medium	English
Source	Last Doubt

Class 10th Science Chapter – 4 Carbon and Its Compounds MCQ With Answers in Which you will learn such topics: Carbon and its Compounds, Covalent Bonding, Versatile Nature, Compounds, Chemical Propeties, Heteroatoms and Functional Groups, Three Allotropes, Hydrocarbons, Catenation, Tetravalency, Saturated and Unsaturated Carbon Compounds etc. This topics are helpes you to better understanding

Class 10th Science Chapter – 4 Carbon and Its Compounds MCQ With Answers

Chapter – 4

Metals and Non-metals

MCQ

Question 1. Carbon exists in the atmosphere in the form of

(a) Carbon monoxide only
(b) Carbon monoxide in traces and carbon dioxide
(c) Carbon dioxide only
(d) Coal

Answer – (b) Carbon monoxide in traces and carbon dioxide

Question 2. Graphite is used as a lubricant in machines because

(a) It is a good conductor of electricity.
(b) It has a high melting point and slippery layers.
(c) Its density ranges from 1.9 to 2.3 g/cm₃.
(d) It is strong and soft.

Answer – (b) It has a high melting point and slippery layers.

Question 3. The allotrope of carbon which is a good conductor of heat and electricity is

(a) Diamond
(b) Graphite
(c) Charcoal
(d) None of these

Answer – (b) Graphite

Question 4. Which of the following is not considered as crystalline allotrope of carbon?

(a) Coal
(b) Diamond
(c) Graphite
(d) Fullerene

Answer – (a) Coal

Question 5. Which form of carbon is found in Golkonda mines of Karnataka?

(a) Diamond
(b) Graphite
(c) Coal
(d) Coke

Answer – (a) Diamond

Question 6. Lead pencil contains

(a) Graphite
(b) Diamond
(c) Lead
(d) Lead sulphate

Answer – (a) Graphite

Question 7. A few drops of ethanoic acid were added to solid sodium carbonate. The observation made was that

(a) A hissing sound was produced
(b) Brown fumes evolved
(c) Brisk effervescence occurred
(d) A pungent smelling gas evolved

Answer – (c) Brisk effervescence occurred

Question 8. A reagent which can help us to distinguish between alkenes and alkynes is:

(a) Bromine water
(b) Carbon tetrachloride
(c) Alkaline KMnO₄
(d) Ammoniacal cuprous chloride

Answer – (d) Ammoniacal cuprous chloride

Question 9. The soap molecule has a

(a) Hydrophilic head and a hydrophobic tail
(b) Hydrophobic head and a hydrophilic tail
(c) Hydrophobic head and a hydrophobic tail
(d) Hydrophilic head and a hydrophilic tail

Answer – (a) Hydrophilic head and a hydrophobic tail

Question 10. Detergents can be used for washing of clothes

(a) Only in hard water
(b) Only in soft water
(c) Both in soft and hard water
(d) None of the above

Answer – (c) Both in soft and hard water

Question 11. Acetic acid was added to a solid X kept in a test tube. A colourless, Odourless gas Y was evolved. The gas was passed through lime water, which turned milky. It was concluded that

(a) Solid X is sodium hydroxide and the gas Y is CO₂
(b) Solid X is sodium bicarbonate and the gas Y is CO₂
(c) Solid X is sodium acetate and the gas Y is CO₂
(d) Solid X is sodium bicarbonate and the gas Y is SO₂

Answer – (b) Solid X is sodium bicarbonate and the gas Y is CO₂

Question 12. A student while observing the properties of acetic acid would report that this smells like

(a) Vinegar and turns red litmus blue
(b) Rotten egg and turns red litmus blue
(c) Vinegar and turns blue litmus red
(d) Rotten egg and turns blue litmus red

Answer – (c) Vinegar and turns blue litmus red

Question 13. Vinegar is a solution of

(a) 50% – 60% Acetic acid in alcohol
(b) 5% – 8% Acetic acid in alcohol
(c) 5% – 8% Acetic acid in water
(d) 50% – 60% Acetic acid in water

Answer – (c) 5% – 8% Acetic acid in water

Question 14. The portion left on dropping a hydrogen atom from an alkane is called

(a) Functional group
(b) Alkenyl group
(c) Alkyl group
(d) Phenyl group

Answer – (c) Alkyl group

Question 15. Carbon forms four covalent bonds by sharing its four valence electrons with four univalent atoms, e.g., hydrogen. After the formation of four bonds, carbon attains the electronic configuration of

(a) Helium
(b) Neon
(c) Argon
(d) Krypton

Answer – (b) Neon

Question 16. Pentane has the molecular formula C₅H₁₂. It has

(a) 5 Covalent bonds
(b) 12 Covalent bonds
(c) 16 Covalent bonds
(d) 17 Covalent bonds

Answer – (c) 16 Covalent bonds

Question 17. How many electrons are there in the outermost orbit of carbon?

(a) Two
(b) Three
(c) One
(d) Four

Answer – (d) Four

Question 18. Which of these is true for most of the organic compounds?

(a) High melting and boiling points
(b) Low melting point but high boiling point
(c) High melting point but low boiling point
(d) Low melting and boiling points

Answer – (b) Low melting point but high boiling point

Question 19. Hydrocarbons are mainly composed of which of these?

(a) Hydrogen, carbon and nitrogen
(b) Hydrogen and carbon
(c) Hydrogen
(d) Hydrogen, oxygen and carbon

Answer – (b) Hydrogen and carbon

Question 20. How many double bonds are there in a saturated hydrocarbon?

(a) One
(b) Two
(c) Three
(d) Zero

Answer – (d) Zero

NCERT Solution Class 10th Science All Chapters MCQ

Chapter 1 – Chemical Reactions and Equations

Chapter 2 – Acids, Bases, and Salts

Chapter 3 – Metals and Non-Metals

Chapter 4 – Carbon and Its Compounds

Chapter 5 – Life Processes

Chapter 6 – Control and Coordination

Chapter 7 – How Do Organisms Reproduce

Chapter 8 – Heredity

Chapter 9 – Light reflection and refraction

Chapter 10 – Human eye and colorful world