Carbon and Its Compounds Class 10 MCQ

Class 10 Science Chapter 4 MCQ Carbon and Its Compounds

MCQ on Carbon and Its Compounds Class 10

Select and write the most appropriate option of the four options for each of the questions :

Question 1.
– CHO represents in functional group (      )
A) esters
B) carboxylic acid
C) alcohols
D) aldehydes
Answer:
D) aldehydes

Question 2.
A function group mainly determines the (      )
A) physical properties
B) chemical properties
C) both A & B
D) None of these
Answer:
B) chemical properties

Question 3.
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 4.
Drinking alcohol is very harmful and it mins the health “Drinking alcohol” stands for  (      )
A) drinking methyl alcohol
B) drinking ethyl alcohol
C) drinking propyl alcohol
D) drinking isopropyl alcohol
Answer:
B) drinking ethyl alcohol

Question 5.
Artificial flavour for orange is obtained from (      )
A) amly acetate
B) isomyl valerate
C) methyl butyrate
D) octyl acetate
Answer:
D) octyl acetate

Question 6.
The ionic part of synthetic detergent is  (     )
A) – OSO₃ – Na⁺
B) – COO- Na⁺
C) -COO- H⁺
D) – COO- CH⁺₃
Answer:
A) – OSO₃ – Na⁺

Question 7.
The difference in the formula and molecular masses of CH₃OH and C₂H₅OH is
A) CH₃ and 16U
B) CH₂ and 14U
C) CH₄ and 18U
D) CH₄ and 16U
Answer:
B) CH₂ and 14U

Question 8.
Which of the following statements about graphite and diamond is true ?
A) They have the same crystal structure
B) They have the same degree of hardness
C) They have the same electrical conductivity
D) They can undergo the same chemical reactions
Answer:
D) They can undergo the same chemical reactions

Question 9.
Which of the following is ethanol ?
A) CH₃CHO
B) CH₃COOH
C) CH₃CH₂OH
D) CH₃COOCH₃
Answer:
C) CH₃CH₂OH

Question 10.
Which of the following contains covalent bond ?
A) MgCl₂
B) CaF₂
C) Al₂O₃
D) HCl
Answer:
D) HCl

Question 11.
The number of covalent bonds in C₄H₁₀ is………….
A) 10
B) 8
C) 13
D) 12
Answer:
C) 13

Question 12.
Which amongst the following will conduct electricity ?
A) C₆H₁₂O₆
B) KCl_(s)
C) C₂H₅OH
D) NaCl₆
Answer:
D) NaCl₆

Question 13.
The self linkage property (catonation) is maximum in
A) carbon
B) silicon
C) sulphur
D) phosphorus
Answer:
A) carbon

Question 14.
Ethane and ethene can be distinguished by
A) Br₂(l)
B) Br₂ (aq) water
C) Cl₂
D) I₂
Answer:
B) Br₂ (aq) water

Question 15.
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:
C) carbon dioxide only

Question 16.
Which of the following statements are usually correct for carbon compounds ? These
i) are good conductors of electricity.
ii) are poor conductors of electricity.
iii) have strong forces of attraction between their molecules
iv) do not have strong forces of attraction between their molecules.
A) (i) and (iii)
B) (ii) and (iii)
C) (i) and (iv)
D) (ii) and (iv)
Answer:
D) (ii) and (iv)

Question 17.
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:
A) only single bonds

Question 18.
Buckminster fullerene is an allotropic form of
A) phosphorus
B) sulphur
C) carbon
D) tin
Answer:
C) carbon

Question 19.
Oils on treating with hydrogen in the presence of palladium of nickel catalyst form fats. This is an example of ( )
A) addition reaction
B) substitution reaction
C) displacement reaction
D) oxidation reaction
Answer:
A) addition reaction

Question 20.
Which of the following is the correct representation of electron dot structure of nitrogen?

Answer:
(D)

Question 21.
Structural formula of ethyne is

Answer:
(A)

Question 22.
Chlorine reacts with saturated hydrocarbons at room temperature in the
A) absence of sunlight
B) presence of sunlight
C) presence of water
D) presence of HCl
Answer:
B) presence of sunlight

Question 23.
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:
B) 12 covalent bonds

Question 24.
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:
C) sodium ethoxide and hydrogen

Question 25.
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 26.
Carbon forms four covalent bonds by sharing its four valance electrons with four equivalent 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 27.
The correct electron dot structure of a water molecule is

Answer:
(C)

Question 28.
Which of the following does not belong to the same homologous series ? (      )
A) CH₄
B) C₂H₆
C) C₃H₈
D) C₄H₈
Answer:
D) C₄H₈

Question 29.
The hetero atoms present in CH₃ – CH₂ – O – CH₂ – CH₂Cl are (      )
i) oxygen
ii) carbon
iii) hydrogen
iv) chlorine
A) (i) and (ii)
B) (ii) and (iii)
C) (iii) and (iv)
D) (i) and (iv)
Answer:
D) (i) and (iv)

Question 30.
Which of the following represents soponification reaction ?

Answer:
(D)

Question 31.
Ethanol reacts with Na metal to form (      )
A) CH₃ONa + H₂
B) C₂H₅ONa + H₂
C) CH₃COONa + H₂
D) CH₃COOH + H₂O
Answer:
B) C₂H₅ONa + H₂

Question 32.
The alcoholic drinks contain (      )
A) CH₃OH
B) CH₃CH₂OH
C) CH₃COOH
D) CH₃COOH₃
Answer:
B) CH₃CH₂OH

Question 33.
The blindness and death is caused by consuming adultrated liquor contains. ( )
A) CH₃OH
B) CH₃COOH
C) CH₃COCH₃
D) CH₃CHO
Answer:
A) CH₃OH

Question 34.
Ethanol, on heating at 443K with cone. H₂SO₄ gives (      )
A) CH₂ = CH₂
B) HC = CH
C) CH₄
D) C₂H₆
Answer:
A) CH₂ = CH₂

Question 35.
When sodium hydrogen carbonate is added to ethanoic acid a gas evolves consider the following statements about the gas evolved ?  (      )
a) It turns lime water milky
b) It is evolved with a brisk effervescence
c) It has a smell of burning sulphur
d) It is also by product of respiration
The correct statement are
A) (a) and (b) only
B) (b) and (d) only
C) (a), (c) and (d)
D) (a), (b) and (d)
Answer:
D) (a), (b) and (d)

Question 36.
Which of the following compound contains double bond ? (      )
A) H₂O
B) CH₄
C) NH₃
D) O₂
Answer:
D) O₂

Question 37.
The property of carbon atom by virtue of which it forms bond with other carbon atoms is called  (      )
A) Chemical bonding
B) Polymerisation
C) Catenation
D) Carbonisation
Answer:
C) Catenation

Question 38.
A curdy solid is formed when (      )
A) soap is added to soft water
B) soap is added to hard water
C) detergent is added to soft water
D) detergent is added to hard water
Two statements are given below as Assertion (A) and Reason (R). Read the statements and choose the correct option.
Answer:
B) soap is added to hard water

Question 39.
Assertion (A) : Carbon is the only element that can form large number of compounds.
Reason (R) : Carbon is tetravalent and shows the property of catenation. ( )
A) Both A and R are true and R is the correct explanation of A.
B) Both A and R are true but R is not the correct explanation of A.
C) A is true but R is false.
D) A is false but R is true.
Answer:
D) A is false but R is true.

Question 40.
Assertion (A) : If the first member of homologous series is methanal, its third member will be propanal. ( )
Reason (R) : All the members of a homologous series show similar chemical properties.
A) Both A and R are true and R is the correct explanation of A.
B) Both A and R are true but R is not the correct explanation of A
C) A is true but R is false.
D) A is false but R is true.
Answer:
B) Both A and R are true but R is not the correct explanation of A

Question 41.
Assertion (A) : Diamond and graphite are allotropes of carbon. ( )
Reason (R): Some elements can have several different structural forms while in the same physical state. These forms are called allotropes.
A) Both A and R are true and R is the correct explanation of A.
B) Both A and R are true but R is not the correct explanation of A
C) A is true but R is false.
D) A is false but R is true.
Answer:
A) Both A and R are true and R is the correct explanation of A.

Question 42.
Assertion (A) : Carbon monoxide is extremely poisonouse in nature. ( )
Reason (R) : Carbon monoxide is formed by complete combustion of carbon.
A) Both A and R are true and R is the correct explanation of A
B) Both A and R are true but R is not the correct explanation of A
C) A is true but R is false.
D) A is false but R is true.
Answer:
C) A is true but R is false.

Question 43.
Assertion (A) : Cooking oil decolourises bromine water. ( )
Reason (R) : Cooking oil is a saturated compound.
A) Both A and R are true and R is the correct explanation of A
B) Both A and R are true but R is not the correct explanation of A.
C) A is true but R is false.
D) A is false but R is true.
Answer:
B) Both A and R are true but R is not the correct explanation of A.

Question 44.
Assertion (A) : Carbon compounds can form chain, branched and ring structures.
Reason (R) : Carbon exhibits the property of catenation.   (     )
A) Both A and R are true and R is the correct explanation of A.
B) Both A and R are true but R is not the correct explanation of A
C) A is true but R is false.
D) A is false but R is true.
Answer:
A) Both A and R are true and R is the correct explanation of A.

Question 45.
Assertion (A) : Soaps are not suitable for washing purpose when water is hard.
Reason (R) : Soaps have relatively weak cleansing action.   (     )
A) Both A and R are true and R is the correct explanation of A.
B) Both A and h are true but R is not the correct explanation of A
C) A is true but R is false.
D) A is false but R is true.
Answer:
B) Both A and h are true but R is not the correct explanation of A

Question 46.
Assertion (A) : Ethanol is present in alcoholic drinks. ( )
Reason (R) : Ethanol has formula CH₃OH.
A) Both A and R are true and R is the correct explanation of A
B) Both A and R are true but R is not the correct explanation of A
C) A is true but R is false.
D) A is false but R is true.
Answer:
C) A is true but R is false.

Question 47.
Assertion (A) : Butane exhibits isomerism. (     )
Reason (R) : Butane is a saturated hydrocarbon.
A) Both A and R are true and R is the correct explanation of A
B) Both A and R are true but R is not the correct explanation of A
C) A is true but R is false.
D) A is false but R is true.
Answer:
B) Both A and R are true but R is not the correct explanation of A

Question 48.
Assertion (A) : Methane is simplest saturated hydrocarbon. (     )
Reason (R) : Methane belongs to alkene.
A) Both A and R are true and R is the correct explanation of A
B) Both A and R are true but R is not the correct explanation of A
C) A is true but R is false.
D) A is false but R is true.
Answer:
C) A is true but R is false.

Question 49.
A compound with which of the following functional groups is MOST LIKELY to cause the decomposition of baking soda to produce carbon dioxide ?

A) P
B) Q
C) R
D) S
Answer:
D) S

Question 50.
Which of the following sets of materials can be used for conducting a saponification reaction for the preparationd Soap ? (      )
A) Ca(OH)₂ and neem oil
B) NaOH and neem oil
C) NaOH and mineral oil
D) Ca(OH)₂ and mineral oil
Answer:
B) NaOH and neem oil

Question 51.
A student adds a few drops of ethanoic acid to test tubes X, Y and Z containing aqueous solutions of sodium chloride sodium hydroxide and sodium carbonate respectively. If he now brings a burning splinter near the mouth of the test tubes immediately after adding the ethanoic acid in each one of them in which of the test tube or test tubes the flame gets extinguished ?
A) X and Y
B) Y and Z
C) X and Z
D) only Z
Answer:
B) Y and Z

Question 52.
Consider the following comments about saponification reactions : (      )
I. Heat is evolved in these reactions
II. For quick precipitation of soap sodium chloride is added to the reaction mixture.
III. Saponification reactions are special kind of neutralization reactions.
IV. Soaps are basic salts of long chain bitty acids.
The correct comments are :
A) I, II and III
B) II, III and IV
C) I, II and IV
D) Only I and IV
Answer:
C) I, II and IV

Question 53.
In order to study saponification reaction we first prepare 20% solution of sodium hydroxide. If we record the temperature of this solution just after adding sodium hydroxide flakes to waiter and also tests its nature using litmus, it may be concluded that the process of making this solution is : ( )
A) exothermic and the solution is alkaline.
B) endothermic and the solution is alkaline.
C) endothermic and the solution is acidic.
D) exothermic and the solution is acidic.
Answer:
A) exothermic and the solution is alkaline.

Question 54.
Several factories were pouring their wastes in rivers A and B. Water samples were collected from these two rivers. It was observed that sample collected from river A was acidic while that of river B was basic. The factories located near A and B are (      )
A) Soaps and detergents factories near A and alcohol distillery near B.
B) Soaps and detergents factories near B and alcohol distillery near A.
C) Lead storage battery manufacturing factories near A and soaps and detergents factories near B.
D) Lead storage battery manufacturing factories near B and soaps and detergents factories near A.
Answer:
B) Soaps and detergents factories near B and alcohol distillery near A.

Question 55.
A student takes four test tubes marked P, Q, R and S of 25 ml capacity and fill 10 ml of distilled water in each. He dissolves one spoon full of four different salts in each as-KCl in P, NaCl in Q, CaCl₂ in R and MgCl₂ in S. He then adds about 2 ml of a sample of soap solution to each of the above test tubes. On shaking the contents of each of the test tubes, he is likely to observe a good amount of lather (foam) in the test tubes marked :  (      )
A) P and Q
B) R and S
C) P, Q and R
D) P, Q and S
Answer:
A) P and Q

Question 56.
While preparing soap a small quantity of common salt is generally added to the reaction mixture of vegetable oil and sodium hydroxide. Which one of the following may be the purpose of adding common salt ? (    )
A) To reduce the basic nature of the soap
B) To make the soap neutral
C) To enhance the cleansing power of the soap
D) To favour the precipitation of the soap
Answer:
D) To favour the precipitation of the soap

Question 57.
A student takes about 4 mL of distilled water in four test tubes marked P, Q, R and He then dissolves in each test tube an equal amount of one salt in one test tube, namely sodium sulphate in P, potassium sulphate in Q. calcium sulphate in R and magnesium sulphate in S. After that he adds an equal amount of soap solution in each test tube. On shaking each of these test tubes well, he observes a good amount of lather (foam) in the test tubes marked ( )
A) P and Q
B) Q and R
C) P, Q and S
D) P, Q and S
Answer:
A) P and Q

Question 58.
A student takes about 6 mL of distilled water in each of the four test tubes P, Q, R and S, then dissolves an equal amount of four different salts namely sodium chloride in ‘P’, potassium chloride in ‘Q’, calcium chloride in ‘R’ and magnesium chloride in ‘S’. He then adds 10 drops of soap solution to each test tube and shakes its contents. The test tubes in which scum (insoluble substance) is formed with soap are. (  )
A) P and Q
B) Q and R
C) R and S
D) Q and S
Answer:
A) P and Q

Question 59.
Which of the following statements describes the combustion of carbon compounds correctly?A) Carbon compounds release heat and light without burning.
B) Carbon compounds do not burn in the presence of oxygen.
C) Carbon compounds release heat and light on burning.
D) Carbon compounds release oxygen on burning.
Answer:
C) Carbon compounds release heat and light on burning.

Question 60.
Which of the following statements about carbon compounds is incorrect ? (      )
A) The general formula for alkenes can be written as C_nH_2n
B) Alkenes differ by a – CH₂ – unit in their successive members.
C) Alkanes and alkynes also follow specific general formulas.
D) Alkenes and alkynes are examples of carbon compounds with unsaturated bonds.
Answer:
B) Alkenes differ by a – CH₂ – unit in their successive members.

Question 61.
Which of the following pairs is incorrectly matched ? (     )
A) Methane – molecular formula CH₄
B) Carbon compounds – burn in oxygen to give carbon dioxide, water, heat, and light Q
C) Carbon bonding – can form covalent bonds or ionic bonds
D) Alkanes – have the general formula C_nH_2n
Answer:
B) Carbon compounds – burn in oxygen to give carbon dioxide, water, heat, and light Q

Question 62.
Choose the compound that does not produce a yellow, sooty flame when burned:
A) Naphthalene
B) Camphor
C) Alcohol
D) Carbon dioxide
Answer:
D) Carbon dioxide

Question 63.
Arrange the following steps in the  correct sequence : (     )
Step 1 : Identify the number of carbon atoms in the compound.
Step 2 : Determine the presence of a functioned group.
Step 3 : Indicate the functional group using either a prefix or a suffix.
Step 4 : Name the compound using the basic carbon chain modified by the prefix or suffix.
A) Step 1, Step 2, Step 3, Step 4
B) Step 2, Štep 1, Step 3, Step 4
C) Step 1, Step 3, Step 2, Step 4
D) Step 3, Step 1, Step 2, Step 4
Answer:
C) Step 1, Step 3, Step 2, Step 4

Question 64.
Arrange the following melting points of carbon compounds In Increasing order.
I. Methane (CH₄)
2. Ethanol (CH₅CH₂OH)
3. Acetic acid (CH₃COOH)
4. Chloroform (CHCl₃)
A) 4,2,3,1
B) 4,3,2,1
C) 1,2,3,4
D) 1,3,2,4
Answer:
B) 4,3,2,1

Question 65.
Arrange the following compounds in increasing order of foam formation with hard water.
1) Soap solution (less foam)
2) Detergent solution (more foam)
3) Detergent solution (more foam)
4) Detergent solution (more foam)
A) 4, 3, 2,1
B) 1,2, 3, 4
C) 2, 1, 4, 3
D) 1, 3, 2, 4
Answer:
B) 1,2, 3, 4

Question 66.
Arrange the following reactions in the correct sequence to balance them. ( )
1) CH₃CH₂OH + O₂ → CO₂ + H₂O + heat and light
2) CH₄ + O₂ → CO₂ + H₂O + heat and light
3) C + O₂ → CO₂ + heat and light
A) 3, 2, 1
B) 2, 3, 1
C) 1, 3, 2
D) 2, 1, 3
Answer:
C) 1, 3, 2

Question 67.
Assertion : Carbon is a versatile element that can form bonds with other atoms to create large and complex molecules. (     )
Reason: Carbdn has a valency of four, allowing it to bond with four other atoms and produce compounds with specific properties.
A) Both assertion and reason are true, and the reason is the correct explanation of the assertion.
B) Both assertion and reason are true, but the reason is not the correct explanation of the assertion.
C) The assertion is true, but reason is false
D) The assertion is false, but the reason is true.
Answer:
A) Both assertion and reason are true, and the reason is the correct explanation of the assertion.

Question 68.
Assertion: Carbon compounds release a large amount of heat and light when burned.
Reason : Carbon compounds undergo oxidation reactions and react with oxygen to form carbon dioxide.  (     )
A) Both assertion and reason are true, and the reason is the correct explanation of the assertion.
B) Both assertion and reason are true, but the reason is not the correct explanation of the assertion.
C) The assertion is true, but the reason is false.
D) The assertion is false, but the reason is true.
Answer:
A) Both assertion and reason are true, and the reason is the correct explanation of the assertion.

Question 69.
Assertion : Carbon compounds containing multiple carbon atoms can form a homologous series. (     )
Reason: A homologous series is a group of compounds with similar chemical prop­erties that have the same functional group but differ in the number of carbon atoms.
A) Both assertion and reason are true, and the reason is the correct explanation of the assertion.
B) Both assertion and reason are true, but the reason is not the correct explanation of the assertion.
C) The assertion is true, but the reason is false.
D) The assertion is false, but the reason is true.
Answer:
A) Both assertion and reason are true, and the reason is the correct explanation of the assertion.

Question 70.
Assertion : Methane (CH₄) is a carbon compound with a lower boiling point than acetic acid (CH₃COOH).
Reason : The boiling point of a carbon compound generally increases with the in­crease in molecular size and complexity.
A) Both assertion and reason are true, and the reason is the correct explanation of the assertion.
B) Both assertion and reason are true, but the reason is not the correct explanation of the assertion.
C) The assertion is true, but the reason is false.
D) The assertion is false, but the reason is true.
Answer:
C) The assertion is true, but the reason is false.

10th Class Physical Science Bit Bank