MCQs for Class 10 Science Chapter 4 Carbon and its Compounds

MCQs for Class 10 Science Chapter 4 Carbon and its Compounds: In this article, we have covered all the important MCQs for Free for Class 10 Term 1 2021-22 Board Exams. In accordance with the latest pattern, Padhle is here with MCQ Questions for Class 10.

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MCQ for Class 10 Science Chapter 4 Carbon and its Compounds

Question 1:
The isomeric pair is
(a) Ethane and propane
(b) Propane and butane
(c) Ethane and ethane
(d) Butane and 2-methylpropane
Answer : (d) Butane and 2-methylpropane

Question 2:
Which of the given is used to oxidize ethanol to ethanoic acid?
(a) Alkaline KMnO₄
(b) Conc. H₂SO₄
(c) Acidified K₂Cr₂O₇
(d) All of these
Answer : (d) All of these

Question 3:
Which is a denatured spirit?
(a) Ethanol only
(b) Ethanol and methanol (50%)
(c) Ethanol and methanol (5%)
(d) Methanol only
Answer : (c) Ethanol and methanol (5%)

Question 4:
The isomeric pair is
(a) ethane and propane
(b) propane and butane
(c) ethane and ethane
(d) butane and 2-methyl propane

Answer : (d) butane and 2-methyl propane

Question 5:
The by-product of soap is
(a) Isoprene
(b) Glycerol
(c) Butene
(d) Ethylene glycol

Answer : (b) Glycerol

Question 6:
Covalent compounds
(a) Have high melting and boiling point
(b) Are mostly soluble in water
(c) Are formed between atoms of metals and non-metals
(d) Are formed by the sharing of electrons in the bonding atoms
Answer : (d) Are formed by the sharing of electrons in the bonding atoms

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Question 7:
Vinegar is a solution of
A. 30% – 40% acetic acid in alcohol
B. 5% – 8% acetic acid in alcohol
C. 5% – 8% acetic acid in water
D. 15% -20% acetic acid in water
Answer : C. 5% – 8% acetic acid in water

Question 8:
Which of the given can be used for the denaturation of ethyl alcohol?
A. Methyl alcohol
B. Pyridines
C. Copper sulphate
D. All of these
Answer: All of these

Question 9:
Soaps are formed by saponification of
A. Alcohols
B. Glycosides
C. Simple esters
D. Carboxylic acids
Answer: C. Simple esters

Question 10:
Carbon exists in the atmosphere in the form of
A. Only carbon monoxide
B. Carbon monoxide in traces and carbon dioxide
C. Only carbon dioxide
D. Coal
Answer: C. Only carbon dioxide

Question 11:
Which of the following statements are usually correct for carbon compounds? These
(a) Are good conductors of electricity.
(b) Are poor conductors of electricity.
(c) Have strong forces of attraction between their molecules.
(d) Do not have strong forces of attraction between their molecules.
A. (A) & (C)
B. (B) & (C)
C. (A) & (D)
D. (B) & (D)
Answer : D. (B) & (D)

Question 12:
A molecule of ammonia (NH₃) has
A. Only single bonds
B. Only double bonds
C. Only triple bonds
D. Two double bonds and one single bond
Answer : (d) Are formed by the sharing of electrons in the bonding atoms

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Question 13:
Two neighbours of homologous series differ by
A. _CH
B. _CH₂
C. _CH₃
D. _CH₄
Answer: B. _CH₂

Question 14:
Which one of the given is an unsaturated hydrocarbon?
A. Acetylene
B. Butane
C. Propane
D. Decane
Answer: A. Acetylene

Question 15:
Which of the given is an odd compound?
A. Ethene
B. Ethane
C. Propene
D. Acetylene
Answer: B. Ethane

Question 16:
Which of the given represents a saponification reaction?
A. CH₃COONa + NaOH + CaO → CH₄ + Na₂CO₃
B. CH₃COOH + C₂H₅ + H₂SO₄ → CH₃COOC₂H₅ + H₂O
C. 2CH₃COOH + 2Na → 2CH₃COONa + H₂
D. CH₃COOC₂H₅ + NaOH → CH₃COONa + C₂H₅OH
Answer: D. CH₃COOC₂H₅ + NaOH → CH₃COONa + C₂H₅OH

Question 17:
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: D. 50% – 60% acetic acid in water

Question 18:
Ethanol reacts with sodium and forms two products. These are
A. Sodium ethanoate and hydrogen
B. Sodium ethanoate and oxygen
C. Sodium ethoxide and hydrogen
D. Sodium ethoxide and oxygen
Answer : A. Sodium ethanoate and hydrogen

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Question 19:
How many carbon atoms are present in one molecule of ethanol?
A. One
B. Two
C. Three
D. Four
Answer : B. Two

Question 20:
How many carbon atoms are present in one molecule of ethanoic acid?
A. One
B. Two
C. Three
D. Four
Answer : B. Two

Question 21:
How many single bonds are present in methane?
A. Four
B. Five
C. Six
D. Three
Answer : A. Four

Question 22:
Which of the given has a triple bond?
A. Hydrogen molecule
B. Oxygen molecule
C. Nitrogen molecule
D. Ammonia molecule
Answer : C. Nitrogen molecule

Question 23:
Which allotrope of carbon is in the form of the geodesic globe?
A. Graphite
B. Diamond
C. Fullerene
D. Carbon nanotube
Answer : C. Fullerene

Question 24:
Which of the given is a noble gas?
A. Carbon
B. Argon
C. Nitrogen
D. Hydrogen
Answer : B. Argon

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Question 25:
The heteroatoms present in CH₃ ─ CH₂ ─ O ─ CH₂ ─ CH₂Cl are:
(a) Oxygen
(b) Carbon
(c) Hydrogen
(d) Chlorine
A. (A) & (B)
B. (B) & (C)
C. (C) & (D)
D. (A) & (D)
Answer : D. (A) & (D)

Question 26:
The name of the compound, CH₃ ─ CH₂ ─ CHO is:
A. Propanal
B. Propanone
C. Ethanol
D. Ethanal

Answer : A.Propanal

Question 27:
Major constituent of LPG is……………
A. Ethene
B. Butane
C. Propane
D. Pentane
Answer : B. Butane

Question 28:
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 29:
Mineral acids are stronger acids than carboxylic acids because
(a) Mineral acids are completely ionised
(b) Carboxylic acids are completely ionised
(c) Mineral acids are partially ionised
(d) Carboxylic acids are partially ionised
A. (A) & (D)
B. (B) & (C)
C. (A) & (B)
D. (C) & (D)
Answer : A. (A) & (D)

Question 30:
Butanone is a four-carbon compound with the functional group ______
A. Carboxylic acid
B. Aldehyde
C. Ketone
D. Alcohol
Answer : C. Ketone

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Question 31:
Solubility of alcohol in water is due to
(a) low density of alcohol
(b) volatile nature of alcohol
(c) ionisation
(d) hydrogen bonding

Answer : (d) hydrogen bonding

Question 32:
A soap molecule has a
(a) hydrophobic head and hydrophobic tail
(b) hydrophobic head and hydrophilic tail
(c) hydrophilic head and hydrophilic tail
(d) hydrophilic head and hydrophobic tail
Answer : (d) hydrophilic head and hydrophobic tail

Question 33:
I.U.P.A.C. name of acetaldehyde is:
(a) Ethanol
(b) Ethanal
(c) Methanol
(d) Methanal

Answer : (b) Ethanal

Question 34:
In diamond, each carbon atom is bonded to four other carbon atoms to form
(a) a hexagonal array
(b) a rigid three-dimensional structure
(c) a structure in the shape of a football
(d) a structure of a ring
Answer : (b) a rigid three-dimensional structure

Question 35:
Butanone is a four-carbon compound with the functional group ______
A. Carboxylic acid
B. Aldehyde
C. Ketone
D. Alcohol
Answer : C. Ketone

Question 36:
The chemical formulae of propane is :
(a) CH4CH4
(b) C3H8C3H8
(c) C4H10C4H10
(d) C2H6C2H6

Answer : (b) C3H8C3H8

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Question 37:
The first member of the alkyne homologous series is
(a) propyne
(b) ethyne
(c) methane
(d) ethene

Answer : (b) ethyne

Question 38:
Butanone is a four-carbon compound with the functional group:
(a) carboxylic acid
(b) aldehyde
(c) ketone
(d) alcohol

Answer : (c) ketone

Question 39:
Ethane, with the molecular formula C2H6C2H6 has :
(a) 6 covalent bonds
(b) 7 covalent bonds
(c) 8 covalent bonds
(d) 9 covalent bonds.

Answer : (b) 7 covalent bonds

Question 40:
Give the IUPAC name of CH₃COOC₂H₅.
(a) Ethyl ethanoic acid
(b) Butanoate
(c) Ethyl ethanoate
(d) Etyl methyl carboxylic acid

Answer : (d) Etyl methyl carboxylic acid

Question 41:
Identify A and B

MCQ Questions for Class 10 Science Carbon and Its Compounds with Answers 3

Answer : (a)

Question 42:
A hydrocarbon has four carbon atoms. Give its molecular formula if it is an alkene.
(a) C₄H₁₀
(b) C₄H₈
(C) C₄H₆
(d) C₄H₄

Answer : (b) C₄H₈

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Question 43:
Which of the following belongs to homologous series of alkynes?
C₆H₆, C₂H₆, C₂H₄, C₃H₄.
(a) C₆H₆
(b) C₂H₄
(C) C₂H₆
(d) C₃H₄

Answer : (d) C₃H₄

Question 44:
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 45:
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/cm3g/cm3.
(d) it is strong and soft.

Answer : (b) it has a high melting point and slippery layers.

Question 46:
100% pure ethanol is called
(a) Rectified spirit
(b) Absolute alcohol
(c) Denatured alcohol
(d) Power alcohol

Answer : (b) Absolute alcohol

Question 47:
A functional group mainly determines the
(a) Physical properties
(b) Chemical properties
(c) Both
(d) None of these

Answer : (b) Chemical properties

Question 48:
Identify ‘A’ in the following reaction:
CH₃COOH + Na₂CO₃ → A + CO₂ + H₀O
(a) CH₃COONa
(b) CH₂(Na)COOH
(c) NaOH
(d) NaHCO₃

Answer : (a) CH₃COONa

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Question 49:
Addition reactions are undergone by
(a) saturated hydrocarbons (alkanes)
(b) only alkenes
(c) only alkynes
(d) both alkenes and alkynes

Answer : (d) both alkenes and alkynes

Question 50:
Name the functional group present in CH₃COCH₃.
(a) Alcohol
(b) Carboxylic acid
(c) Ketone
(d) Aldehyde

Answer : (c) Ketone

Question 51:
Which of the following will give a pleasant smell of ester when heated with ethanol and a small quantity of sulphuric acid?
(a) CH₃COOH
(b) CH₃CH₂OH
(c) CH₃OH
(d) CH₃CHO

Answer : (a) CH₃COOH

Question 52:
Ethanol on complete oxidation gives
(a) acetic acid/ethanoic acid
(b) CO₂ and water
(c) ethanal
(d) acetone/ethanone

Answer : (b) CO₂ and water

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Question 53:
The isomeric pair is
(a) Ethane and propane
(b) Propane and butane
(c) Ethane and ethane
(d) Butane and 2-methylpropane

Answer : (d) Butane and 2-methylpropane

Question 54:
Ethanol reacts with Na metal to form
(a) CH3ONa+H2CH3ONa+H2
(b) C2H5ONa+H2C2H5ONa+H2
(c) CH3COONa+H2CH3COONa+H2
(d) CH3COOH+H2OCH3COOH+H2O

Answer : (b) C2H5ONa+H2C2H5ONa+H2