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Organic Chemistry NEET MCQ. We covered all the Organic Chemistry NEET MCQ in this post for free so that you can practice well for the exam.
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MCQ on Organic Chemistry for NEET Students
In gas welding used for repairing iron items, which mixture is commonly used?
a) Ethane and oxygen
b) Ethene and oxygen
c) Ethyne and oxygen
d) Ethene and air
Option c – Ethyne and oxygen
Which substance can help identify the difference between ethene and ethane?
a) Blue litmus paper
b) Red litmus paper
c) Bromine water
d) Sodium hydrogen carbonate
Option c – Bromine water
Covalent compounds are best described as
a) Substances with high boiling and melting points
b) Compounds mostly soluble in water
c) Formed by bonding between metals and nonmetals
d) Made by sharing electrons between atoms
Option d – Made by sharing electrons between atoms
What is the main by-product formed during the soap-making process?
a) Isoprene
b) Glycerol
c) Butene
d) Ethylene glycol
Option b – Glycerol
If a bottle emits a vinegar-like smell when opened, the liquid inside is likely
a) Hydrochloric acid solution
b) Sodium hydroxide solution
c) Acetic acid solution
d) Saturated sodium bicarbonate solution
Option c – Acetic acid solution
Which reagent cannot distinguish between ethanol and ethanoic acid?
a) Blue litmus
b) Sodium hydroxide
c) Sodium bicarbonate
d) Sodium metal
Option d – Sodium metal
Buckminsterfullerene is a form of which element?
a) Phosphorus
b) Sulphur
c) Carbon
d) Tin
Option c – Carbon
Why is graphite not used as a lubricant in outer space?
a) Lack of atmosphere causes it to sublime
b) Absence of moisture and air prevents layer movement
c) Low pressure turns graphite amorphous
d) None of the above
Option a – Lack of atmosphere causes it to sublime
Why is it not advisable to burn a candle in a closed room with people inside?
a) Carbon dioxide produced causes discomfort
b) Soot particles harm the respiratory system
c) Poisonous methane is released
d) Carbon monoxide is produced, reducing oxygen transport in blood
Option d – Carbon monoxide is produced, reducing oxygen transport in blood
What type of force keeps graphite layers loosely bonded?
a) Gravitational force
b) van der Waals force
c) Coulombic force
d) None of these
Option b – van der Waals force
How many moles of oxygen are required to completely combust one mole of ethene?
a) 1 mol
b) 2 mol
c) 2.5 mol
d) 3 mol
Option d – 3 mol
Which of the listed fatty acids does not produce soap?
a) Butyric acid
b) Oleic acid
c) Palmitic acid
d) Stearic acid
Option a – Butyric acid
The oxide of which element is commonly used as a cooling agent?
a) Silicon
b) Nitrogen
c) Carbon
d) Phosphorus
Option c – Carbon
Which of the following is not a form of carbon?
a) Soot
b) Graphite
c) Diamond
d) Carborundum
Option d – Carborundum
A soap molecule is composed of
a) A water-attracting head and a water-repelling tail
b) A water-repelling head and a water-attracting tail
c) A head and tail that both repel water
d) A head and tail that both attract water
Option a – A water-attracting head and a water-repelling tail
In soap micelles, which of the following statements is true?
a) The charged (ionic) end of the soap molecule remains on the outer side of the micelle, while the hydrocarbon tail stays within the center.
b) The ionic part is inside the micelle and the carbon chain extends outward.
c) Both the charged end and the hydrocarbon tail are situated inside the micelle.
d) Both ends of the soap molecule remain outside the micelle.
Option a – The charged (ionic) end of the soap molecule remains on the outer side of the micelle, while the hydrocarbon tail stays within the center.
When carbon shares its four valence electrons with hydrogen atoms, what electronic configuration does it achieve?
a) Helium
b) Neon
c) Argon
d) Krypton
Option b – Neon
Which type of coal is considered the highest quality?
a) Anthracite
b) Bituminous
c) Lignite
d) Peat
Option a – Anthracite
What is another name used for petroleum?
a) Rock oil
b) Mineral oil
c) Crude oil
d) All of the above
Option d – All of the above
What does water gas consist of?
a) Carbon monoxide and carbon dioxide
b) Carbon monoxide and nitrogen
c) Carbon monoxide and hydrogen
d) Carbon monoxide, nitrogen, and hydrogen
Option c – Carbon monoxide and hydrogen
What type of substances are produced when methane undergoes complete combustion?
a) Acidic and basic
b) Acidic and neutral
c) Basic and neutral
d) Neutral and neutral
Option b – Acidic and neutral
What are the main components found in Liquified Petroleum Gas (LPG)?
a) n-butane, iso-butane, and propane
b) n-ethane, propane, and hexane
c) Octane, methane, and butane
d) Methane and octane only
Option a – n-butane, iso-butane, and propane
Water gas is composed of carbon monoxide and which other gas?
a) Nitrogen
b) Hydrogen
c) Methane
d) Ethane
Option b – Hydrogen
Which fuel is generated from biodegradable waste?
a) Natural gas
b) Oil gas
c) Gobar gas
d) Water gas
Option c – Gobar gas
Ethyl alcohol is commonly used for which of the following purposes?
a) As a solvent
b) As a fuel in spirit burners
c) As a component in alcoholic drinks
d) All of the above
Option d – All of the above
A colorless liquid turns a universal pH paper strip reddish-pink. What is the most likely identity of the liquid?
a) Tap water
b) Sodium hydroxide solution
c) Distilled water
d) Ethanoic acid solution
Option d – Ethanoic acid solution
What is vinegar primarily composed 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
Option c – 5–8% acetic acid in water
What best describes soaps in chemical terms?
a) Sodium salts of carbon-based sulfuric acid compounds containing 10 to 16 atoms
b) Sodium salts of fatty acids having 16 to 18 carbon atoms
c) Sodium salts derived from trihydroxy alcohols
d) None of the above
Option b – Sodium salts of fatty acids having 16 to 18 carbon atoms
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