Grade 10 Chemistry Hydrocarbons MCQs Quiz with Answers Hydrocarbons Multiple Choice Questions and Answers (MCQs), hydrocarbons quiz answers ...
- Grade 10 Chemistry Hydrocarbons MCQs Quiz with Answers
Hydrocarbons Multiple Choice Questions and Answers (MCQs), hydrocarbons quiz answers PDF for online degree courses. MCQs on alkanes, alkenes ana alkynes for online learning. Multiple Choice Questions (MCQ) on hydrocarbons with choices double bond, single bond, triple bond, and coordinate covalent bond for taking online classes.
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MCQ 1: When two carbon atoms share two electron pairs then they form
- single bond
- double bond
- triple bond
- coordinate covalent bond
Answer B
MCQ 2: All are wrong about alkenes, but that they are
- saturated hydrocarbons
- soluble in water
- unsaturated hydrocarbons
- insoluble in organic solvents
Answer C
MCQ 3: What is the physical state of the first four alkanes?
- solid
- liquid
- gas
- plasma
Answer C
MCQ 4: What is the color of bromine?
- brown
- red
- orange
- reddish-brown
Answer D
MCQ 5: Loss of hydrogen halide is called
- halogenation
- dehydration
- Dehydrohalogenation
- hydrogenation
Answer C
MCQ 6: Which of the following is given off during ripening fruits and vegetables?
- ethane
- ethene
- Ethyne
- methane
Answer B
MCQ 7: Acetylene is also called
- Ethyne
- ethene
- ethane
- methane
Answer A
MCQ 8 : Oxy-acetylene torches can produce temperature as high as
- 30 degrees
- 300 degrees
- 3000 degrees
- 30000 degrees
Answer C
MCQ 9 : Chloroform is also called
- chloromethane
- dichloromethane
- Trichloromethane
- tetra chloromethane
Answer C
MCQ 10: The molecular formula of ethane is
- CH4
- C2H6
- C3H8
- C4H10
Answer B
MCQ 11: Which of the following is used as antifreeze in automobile radiators?
- ethane
- methane
- lycopene
- ethylene glycol
Answer D
MCQ 12: What is the term used for the reaction of a substance with oxygen or air that causes the rapid release of heat and the appearance of a flame?
- oxidation
- combustion
- burning
- reduction
Answer B/C
MCQ 13: In alkanes (saturated hydrocarbons) each carbon atom forms
- 2 bonds
- 4 bonds
- 6 bonds
- 8 bonds
Answer B
MCQ 14: Which of the following is used as an anesthetic?
- dichloromethane
- tetra chloromethane
- methyl chloride
- chloroform
Answer D
MCQ 15: How does chlorine react?
- explosively
- slowly in dark but rapidly in strong sunlight
- requires high temperature or strong sun light
- essentially unreactive
Answer B
MCQ 16: Which of the following are saturated hydrocarbons?
- alkanes
- alkenes
- alkynes
- alkyl radicals
Answer A
MCQ 17: How does iodine react?
- explosively
- slowly in dark but rapidly in strong sunlight
- requires high temperature or strong sun light
- essentially unreactive
Answer D
MCQ 18: Which of the following is not true about lighter alkanes?
- their combustion can be controlled
- they produce large amount of heat per gram
- they are expensive and rare
- they are widely used as fuel
Answer C
MCQ 19: What is the color of the flame with which most alkanes burn?
- orange
- yellow
- red
- blue
Answer D
MCQ 20: What type of reaction do alkynes undergo across the triple bond?
- elimination reaction
- substitution reaction
- addition reaction
- halogenation
Answer C
MCQ 21: Glyoxal formed by loss of two water molecules by tetrahydroxy ethane oxidizes to
- ethylene glycol
- acetylene
- oxalic acid
- benzoic acid
Answer C
MCQ 22: What is produced by the complete combustion of an alkane?
- carbon dioxide and water
- carbon dioxide, water and heat
- carbon monoxide, carbon and water
- hydrogen and carbon dioxide
Answer B
MCQ 23: What is the physical state of higher alkanes?
- solid
- liquid
- gas
- plasma
Answer A
MCQ 24: What is given by the incomplete combustion of methane?
- carbon dioxide and water
- carbon dioxide, water and heat
- carbon monoxide, carbon and water
- hydrogen and carbon dioxide
Answer C
MCQ 25: The reaction in which one chlorine atom becomes attached with one carbon and the other one with other carbon atom is called
- elimination reaction
- substitution reaction
- halogenation
- addition reaction
Answer D
MCQ 26: What is the term used for the process in which there is an addition of nascent hydrogen?
- hydrogenation
- dehydration
- reduction
- oxidation
Answer C
MCQ 27: The simplest alkane is
- butane
- propane
- methane
- ethane
Answer C
MCQ 28: Loss of water is called
- hydrogenation
- dehydration
- halogenation
- Dehydrohalogenation
Answer B
MCQ 29: Each Hydrogen atom in an alkane forms
- one bond
- two bonds
- three bonds
- four bonds
Answer D
MCQ 30: The reaction of halogens (Group-VII) and alkane (saturated hydrocarbons) in the presence of sunlight is an example of
- carbation
- halogenation
- substitution
- hydrogenation
Answer C
MCQ 31: Considering the process of reduction of alkyl halides, which of the following is liberated when Zn reacts with aqueous acid?
- hydrogen gas
- nascent hydrogen
- oxygen
- carbon atoms
Answer B
MCQ 32 : What is the state of Trichloromethane at room temperature?
- solid
- liquid
- gas
- plasma
Answer B
MCQ 33: Methane (CH4) is used as
- domestic fuel
- automobile fuel
- urea manufacture
- all of above
Answer D
MCQ 34: What is the physical state of bromine when reacted with an alkene?
- solid
- liquid
- gas
- plasma
Answer B
MCQ 35: Tetrahydroxy ethane loses two water molecules to form
- oxalic acid
- Glyoxal
- acetylene
- ethylene glycol
Answer B
MCQ 36: Tetra halides undergo dehalogenation forming an alkyne on treatment with
- calcium hydroxide
- alcoholic potassium hydroxide
- sodium hydroxide
- Zn dust
Answer D
MCQ 37: Which of the following is true about alkanes?
- they are insoluble in water
- they are more dense than water
- they are essentially polar
- they are reactive towards most ionic compounds
Answer A
MCQ 38: Which of the following has carcinogenic effects at high concentrations?
- tetra chloromethane
- dichloromethane
- methyl chloride
- Trichloromethane
Answer A
MCQ 39: Which color of KMnO4 solution is discharged when an alkene is treated with a dilute alkaline aqueous solution of KMnO4?
- red
- brown
- orange
- pink
Answer D
MCQ 40: Which of the following has two halogen atoms on adjacent carbon atoms?
- vicinal dihalide
- Tetrahalide
- acetylene
- Trichloromethane
Answer A
MCQ 41: Trichloromethane is also called
- chlorophyll
- chloroplast
- chloromethane
- chloroform
Answer D
MCQ 42: Loss of hydrogen halide from alkyl halide gives
- alkenes
- alkanes
- alkynes
- halogens
Answer A
MCQ 43: The reaction of any substance with air is called
- carbation
- halogenation
- sublimation
- combustion
Answer D
MCQ 44: Vicinal dihalide eliminates two molecules of hydrogen halides from adjacent carbon atoms on treatment with
- Zn dust
- calcium hydroxide
- alcoholic potassium hydroxide
- calcium chloride
Answer A
MCQ 45: Which of the following is not true about alkynes?
- they are unsaturated hydrocarbons
- they are saturated hydrocarbons
- they are non-polar
- they dissolve readily in organic solvents
Answer B
MCQ 46 : In alkenes, the two carbon atoms forming double bond are joined to how many atoms?
- one
- two
- three
- four
Answer B
MCQ 47: What is the physical state of alkanes containing five to seventeen carbon atoms?
- solid
- liquid
- gas
- plasma
Answer B
MCQ 48: First three members of alkynes are
- solids
- liquids
- gases
- plasma
Answer C
MCQ 49: Which of the following is not true about alkenes?
- they are unsaturated hydrocarbons
- they are insoluble in water
- they are soluble in organic solvents such as alcohol
- they are soluble in water
Answer D
MCQ 50: Which of the following is used in oxy-acetylene torches for welding and cutting metals?
- Ethyne
- ethene
- ethane
- methane
Answer A
MCQ 51: The molecular formula of methane is
- CH4
- C2H6
- C3H8
- C4H10
Answer A
MCQ 52: What is formed when methane is reacted with chlorine in direct sunlight?
- carbon and HCl
- carbon tetrachloride and HCl
- chloromethane
- dichloromethane
Answer B
MCQ 53 : Which of the following is true about alkynes?
- they are polar
- they do not dissolve in organic solvents
- they are saturated hydrocarbons
- they are non-polar
Answer D
MCQ 54: Which of the following helps to initiate the ripening of fruits and vegetables?
- ethane
- ethene
- Ethyne
- methane
Answer B
MCQ 55: Test for the presence of an alkene is called
- iodine test
- benedict's test
- Baeyer's test
- Kolbe's electrolytic method
Answer A
MCQ 56: The red color of tomatoes is due to alkene named
- ethene
- propene
- lycopene
- butene
Answer C
MCQ 57: Which of the following is not true about alkanes?
- they are non-polar
- they are less dense than water
- they are insoluble in water
- they are reactive towards most ionic compounds
Answer D
MCQ 58: Each carbon atom in an alkane forms
- one bond
- two bonds
- three bonds
- four bonds
Answer D
MCQ 59: The reaction in which -OH group is removed from one carbon and H atom from the adjacent carbon atom is called
- substitution reaction
- addition reaction
- elimination reaction
- dehydration
Answer D
MCQ 60: Alkanes (saturated hydrocarbons) have a density
- less than water
- equal to water
- more than water
- more than mercury
Answer A
MCQ 61 : The odor of Ethyne is
- garlic like
- ginger like
- strawberry like
- petrol like
Answer A
MCQ 62: C5-C15 members of alkenes are
- solids
- liquids
- gases
- plasma
Answer B
MCQ 63: What is the correct trend in the reactivity of halogen with an alkane?
- F2 > Cl2> Br2 > I2
- I2 > Cl2 > Br2 > F2
- Br2 > Cl2 > F2 > I2
- F2 > Br2 > Cl2 >I2
Answer A
MCQ 64 : Alkanes that contain 5 to 17 atoms are in
- solid state
- liquid state
- gaseous state
- plasma state
Answer B
MCQ 65: How does bromine react?
- explosively
- slowly in dark but rapidly in strong sunlight
- requires high temperature or strong sun light
- essentially unreactive
Answer C
MCQ 66: When do alkanes readily react with halogens?
- in darkness
- in sunlight
- all the time
- none of above
Answer B
MCQ 67: Which alkanes are widely used as fuel?
- lighter alkanes
- heavier alkanes
- all the alkanes
- alkenes
Answer A
MCQ 68: What is the state of dichloromethane at room temperature?
- solid
- liquid
- gas
- plasma
Answer B
MCQ 69: When bromine water is added to an alkene, the product is
- red
- orange
- colorless
- reddish-brown
Answer C
MCQ 70: Ethylene glycol is used as an
- ripening agent
- fertilizer
- titrating agent
- anti-freeze
Answer D
MCQ 71: How much ethene is required for the ripening of 1 kg of tomatoes?
- 1 mg
- 100 mg
- 10 mg
- 0.1 mg
Answer D
MCQ 72: What is the state of tetrachloromethane at room temperature?
- solid
- liquid
- gas
- plasma
Answer B
MCQ 73: Which of the following processes involves the addition of hydrogen molecule across carbon-carbon multiple-bond?
- dehydration
- Dehydrohalogenation
- dehalogenation
- hydrogenation
Answer D
MCQ 74: After the first three members, the next eight members of alkynes are
- solids
- liquids
- gases
- plasma
Answer B
MCQ 75: What is the term used for the reaction of an alkane and a halogen?
- substitution reaction
- elimination reaction
- Dehydrohalogenation
- hydrogenation
Answer A
MCQ 76: Which of the following is used as a simple test for the presence of unsaturation?
- red colour of bromine solution
- Decolourization of bromine solution
- orange colour of bromine solution
- none of above
Answer B
MCQ 77: How does fluorine react?
- explosively
- slowly in dark but rapidly in strong sunlight
- requires high temperature or strong sun light
- essentially unreactive
Answer A
MCQ 78: Higher members of alkenes are
- solids
- liquids
- gases
- plasma
Answer A
MCQ 79: Higher members of alkynes are
- solids
- liquids
- gases
- plasma
Answer A
MCQ 80: Addition of hydrogen to ethene forms
- methane
- propane
- butane
- ethane
Answer D
MCQ 81 : The odor of Ethyne is
- onion like
- garlic like
- vinegar like
- fruity
Answer B
MCQ 82: What causes the red color of tomatoes?
- lycopene
- ethene
- ethylene glycol
- acetylene
Answer A
MCQ 83: Acetylene is another name of
- ethyne
- propene
- butene
- pentene
Answer A
MCQ 84: Ethene, propene, and butene are
- solids
- liquids
- gases
- plasma
Answer B
MCQ 85: What is the state of methyl chloride at room temperature?
- solid
- liquid
- gas
- plasma
Answer B
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