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
Gas welding is used for welding broken pieces of iron, we normally use a mixture of
(a) ethane and oxygen
(b) ethene and oxygen
(c) ethyne and oxygen
(d) ethene and air
Option c – ethyne and oxygen
Ethene and ethane can be distinguished from each other by
(a) Blue litmus paper
(b) Red litmus paper
(c) Bromine water
(d) Sodium hydrogen carbonate
Option c – Bromine water
Covalent compounds :
(a) have high melting and boiling points.
(b) are mostly soluble in water.
(c) are formed between atoms of metals and nonmetals
(d) are formed by the sharing of electrons in the bonding atoms.
Option d – are formed by the sharing of electrons in the bonding atoms
The by-product of soap is :
(a) Isoprene
(b) Glycerol
(c) Butene
(d) Ethylene glycol
Option b – Glycerol
When the stopper of a bottle containing a colorless liquid was removed, the bottle gave out a smell like that of vinegar. The liquid in the bottle could be :
(a) hydrochloric acid solution
(b) sodium hydroxide solution
(c) acetic acid solution
(d) saturated sodium hydrogen carbonate solution.
Option c – acetic acid solution
Which of the following cannot distinguish ethanol from ethanoic acid?
(a) Blue litmus
(b) Sodium hydroxide
(c) Sodium hydrogen carbonate
(d) Sodium metal
Option d – Sodium metal
Buckminsterfullerene is an allotropic form of
(a) phosphorus
(b) sulphur
(c) carbon
(d) tin
Option c – carbon
We can not use graphite as a lubricant in space because
(a) there is no atmosphere in space and so graphite sublimes in space.
(b) there is no atmosphere in space and so there is no adsorbed air and water between layers of graphite.
(c) absence of external pressure transforms crystalline graphite into amorphous graphite.
(d) None of the above is correct.
Option a – there is no atmosphere in space and so graphite sublimes in space
It is advised that we should not light a candle in a closed room with people, because
(a) the carbon dioxide formed by burning a candle causes breathlessness.
(b) carbon particles that are formed due to the burning of candles are dangerous for the respiratory tract.
(c) methane gas, which is poisonous in nature, is formed when a candle burns.
(d) carbon monoxide gas, which reduces the ability to carry oxygen, is formed when a candle’s blood burns.
Option d – carbon monoxide gas, which reduces the ability to carry oxygen, is formed when a candle’s blood burns
Which of the following attractive forces exists between different layers of graphite?
(a) Gravitational forces
(b) van der Waals forces
(c) Coulombic forces
(d) None of these
Option b – van der Waals forces
The amount of oxygen used in the combustion of 1 mol of ethene is
(a) 1 mol
(b) 2 mol
(c) 2.5 mol
(d) 3 mol
Option d – 3 mol
Soaps are sodium salts of fatty acids. Which of the following fatty acid does not form soap?
(a) Butyric acid
(b) Oleic acid
(c) Palmitic acid
(d) Stearic acid
Option a – Butyric acid
The oxide of which of the following elements is used as a coolant?
(a) Silicon
(b) Nitrogen
(c) Carbon
(d) Phosphorus
Option c – Carbon
Which one of the following is not an allotrope of carbon?
(a) Soot
(b) Graphite
(c) Diamond
(d) Carborundum
Option d – Carborundum
The soap molecule has an
(a) hydrophilic head and a hydrophobic tail
(b) hydrophobic head and a hydrophilic tail
(c) hydrophobic head and a hydrophobic tail
(d) hydrophilic head and a hydrophilic tail
Option a – hydrophilic head and a hydrophobic tail
In the soap micelles
(a) the ionic end of soap is on the surface of the cluster while the carbon chain is in the interior of the cluster.
(b) ionic end of soap is in the interior of the cluster and the carbon chain is out of the cluster.
(c) both the ionic end and carbon chain are in the interior of the cluster
(d) both ionic end and carbon chain are on the exterior of the cluster
Option a – the ionic end of soap is on the surface of the cluster while the carbon chain is in the interior of the cluster
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
Option b – neon
The best variety of coal is
(a) Anthracite
(b) Bituminous
(c) Lignite
(d) Peat
Option a – Anthracite
Petroleum is also known as
(a) Rock oil
(b) Mineral oil
(c) Crude oil
(d) All of these
Option d – All of these
Water gas is
(a) CO + CO₂
(b) CO + N₂
(c) CO + H₂
(d) CO + N₂ + H₂
Option c – CO + H₂
The nature of products obtained on complete combustion of methane is
(a) acidic, basic
(b) acidic, neutral
(c) basic, neutral
(d) neutral, neutral
Option b – acidic, neutral
The Main Composition of Liquified Petroleum Gas (LPG) is
(a) n-butane, iso-butane, and propane
(b) n-ethane, propane, and hexane
(c) Octane, methane, and butane
(d) only methane and octane
Option a – n-butane, iso-butane, and propane
Water gas is a mixture of carbon monoxide with
(a) Nitrogen
(b) Hydrogen
(c) Methane
(d) Ethane
Option b – Hydrogen
Which of the following is obtained from organic wastes?
(a) Natural gas
(b) Oil gas
(c) Gobar gas
(d) Water gas
Option c – Gobar gas
Ethyl alcohol is used
(a) as a solvent
(b) as a fuel in spirit lamps
(c) as an alcoholic beverage
(d) All the above are correct
Option d – All the above are correct
A colorless liquid sample was tested with a universal pH paper strip. The color of the strip is changed to reddish pink. The sample would be
(a) tap water
(b) sodium hydroxide solution
(c) distilled water
(d) ethanoic acid solution
Option d – ethanoic acid solution
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
Option c – 5-8% acetic acid in water
Soaps are
(a) sodium containing carbon salts of sulphuric acids atoms 10 to 16
(b) sodium carbon atoms salts of fatty acids containing 16 to 18
(c) sodium salts of trihydroxy alcohols
(d) None of the above
Option b – sodium carbon atoms salts of fatty acids containing 16 to 18
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