Extra 40 Multiple Choice Questions (MCQs) with answers from Chapter:4 Carbon and its Compounds for Class 10 CBSE Science:

 

Carbon belongs to which group in the periodic table?
a) Group 12
b) Group 14
c) Group 16
d) Group 18
Ans: (b) Group 14

 

Carbon has how many valence electrons?
a) 2
b) 4
c) 6
d) 8
Ans: (b) 4

 

The property of carbon to form long chains is called:
a) Catenation
b) Isomerism
c) Polymerization
d) Hybridization
Ans: (a) Catenation

 

Which of the following is NOT an allotrope of carbon?
a) Diamond
b) Graphite
c) Fullerene
d) Quartz
Ans: (d) Quartz

 

Which type of bond is present in a diamond?
a) Ionic bond
b) Covalent bond
c) Metallic bond
d) Hydrogen bond
Ans: (b) Covalent bond

 

Diamond is:
a) Good conductor of electricity
b) Bad conductor of electricity
c) Both good and bad conductor
d) Amphoteric in nature
Ans: (b) Bad conductor of electricity

 

Graphite is a good conductor of electricity due to the presence of:
a) Free protons
b) Free electrons
c) Free neutrons
d) Free molecules
Ans: (b) Free electrons

 

Which of the following is a saturated hydrocarbon?
a) Ethene
b) Ethyne
c) Ethane
d) Benzene
Ans: (c) Ethane

 

The general formula of alkanes is:
a) CnH2n
b) CnH2n+2
c) CnH2n-2
d) CnH2nO2
Ans: (b) CnH2n+2

 

The IUPAC name of CH4 is:
a) Methane
b) Methane
c) Methanol
d) Methanolic acid
Ans: (b) Methane

 

The functional group present in alcohols is:
a) -OH
b) -COOH
c) -CHO
d) -CO-
Ans: (a) -OH

 

The molecular formula of ethene is:
a) C2H2
b) C2H4
c) C2H6
d) C3H6
Ans: (b) C2H4

 

The IUPAC name of CH3COOH is:
a) Ethanol
b) Methanolic acid
c) Ethanoic acid
d) Acetone
Ans: (c) Ethanoic acid

 

Which of the following hydrocarbons undergoes addition reaction?
a) Alkanes
b) Alkenes
c) Alkynes
d) Both (b) and (c)
Ans: (d) Both (b) and (c)

 

The process of conversion of vegetable oil into vegetable ghee is known as:
a) Oxidation
b) Hydrogenation
c) Reduction
d) Fermentation
Ans: (b) Hydrogenation

 

The functional group present in aldehydes is:
a) -CHO
b) -COOH
c) -OH
d) -CO-
Ans: (a) -CHO

 

The simplest ketone is:
a) Formaldehyde
b) Acetone
c) Benzene
d) Ethanol
Ans: (b) Acetone

 

The reaction of an alcohol with acetic acid forms:
a) An aldehyde
b) A ketone
c) An ester
d) An acid
Ans: (c) An ester

 

Which property of carbon leads to a large number of organic compounds?
a) Isomerism
b) Catenation
c) Polymerization
d) All of these
Ans: (d) All of these

 

Ethanol is also known as:
a) Acetone
b) Formaldehyde
c) Ethyl alcohol
d) Acetic acid
Ans: (c) Ethyl alcohol

 

The reaction between an alcohol and carboxylic acid forms:
a) Ester
b) Aldehyde
c) Alcohol
d) Amine
Ans: (a) Ester

 

Which gas is released when sodium reacts with ethanol?
a) Hydrogen
b) Oxygen
c) Carbon dioxide
d) Nitrogen
Ans: (a) Hydrogen

 

The reaction of carboxylic acid with base forms:
a) Alcohol
b) Ester
c) Salt and water
d) Hydrocarbon
Ans: (c) Salt and water

 

Methanol is also known as:
a) Methyl alcohol
b) Ethyl alcohol
c) Acetic acid
d) Propanol
Ans: (a) Methyl alcohol

 

Soap is formed by the reaction of:
a) An acid and a base
b) An ester and a base
c) A salt and an acid
d) A metal and a non-metal
Ans: (b) An ester and a base

 

The molecular formula of benzene is:
a) C6H12
b) C6H6
c) C5H10
d) C7H14
Ans: (b) C6H6

 

Vinegar contains:
a) Acetic acid
b) Ethanol
c) Methanol
d) Acetone
Ans: (a) Acetic acid

 

Hard water contains:
a) Calcium and Magnesium salts
b) Sodium and Potassium salts
c) Iron and Zinc salts
d) Copper and Lead salts
Ans: (a) Calcium and Magnesium salts

 

Detergents are preferred over soap because:
a) They form scum in hard water
b) They work in soft water only
c) They work in hard water too
d) They do not dissolve in water
Ans: (c) They work in hard water too

 

 

The process used to break down hydrocarbons into simpler molecules is:
a) Cracking
b) Combustion
c) Hydrogenation
d) Oxidation
Ans: (a) Cracking

31. Which alcohol is used in hand sanitizers?

a) Methanol
b) Ethanol
c) Propanol
d) Butanol
Ans: (b) Ethanol

 

32. Which gas is evolved when carboxylic acids react with carbonates?

a) Hydrogen
b) Oxygen
c) Carbon dioxide
d) Nitrogen
Ans: (c) Carbon dioxide

 

33. Which compound is commonly called wood spirit?

a) Methanol
b) Ethanol
c) Acetone
d) Ethanoic acid
Ans: (a) Methanol

 

34. What is the common name for CH3-CH2-OH?

a) Methanol
b) Ethanol
c) Acetone
d) Ethanoic acid
Ans: (b) Ethanol

 

35. What is the molecular formula of methane?

a) CH4
b) C2H6
c) C3H8
d) C4H10
Ans: (a) CH4

 

36. What is the main component of Liquefied Petroleum Gas (LPG)?

a) Methane
b) Propane and Butane
c) Ethane and Pentane
d) Carbon monoxide
Ans: (b) Propane and Butane

 

37. Ethanoic acid gives what kind of smell?

a) Sweet
b) Vinegar-like
c) Rotten egg
d) Fruity
Ans: (b) Vinegar-like

 

38. Which reaction is called saponification?

a) Formation of soap
b) Formation of alcohol
c) Formation of ketone
d) Formation of aldehyde
Ans: (a) Formation of soap

 

39. What is the IUPAC name of Acetone?

a) Propanone
b) Ethanal
c) Butanol
d) Propanol
Ans: (a) Propanone

 

40. Which metal reacts with acetic acid to produce hydrogen gas?

a) Copper
b) Iron
c) Sodium
d) Gold
Ans: (c) Sodium