Organic Chemistry Class 11 MCQ for NEET. We covered all the Organic Chemistry Class 11 MCQ for NEET in this post for free so that you can practice well for the exam.
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MCQ on Organic Chemistry Class 11 for NEET Students
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
Cyclohexane, a hydrocarbon, floats on water because
(a) it is immiscible with water
(b) its density is low compared to water
(c) it is a non-polar substance
(d) it is immiscible and lighter than water
Option d – it is immiscible and lighter than water
The functional group present in CH3COOC₂H5 is
(a) ketonic
(b) aldehydic
(c) ester
(d) carboxylic
Option c – ester
The treatment of acetic acid with lithium aluminum hydride (LiAlH4) produces
(a) methanol
(b) ethanol
(c) ethanal
(d) methanal
Option b – ethanol
Pentane has the molecular formula C5H12. It has
(a) 5 covalent bonds
(b) 12 covalent bonds
(c) 16 covalent bonds
(d) 17 covalent bonds
Option c – 16 covalent bonds
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
A reagent used to test unsaturation in an alkene is
(a) ammonical Cu₂Cl₂
(b) ammonical AgNO3 solution
(c) solution of Br₂ in CCl4
(d) conc. H₂SO4
Option c – solution of Br₂ in CCl4
The most satisfactory method to separate a mixture of sugars is
(a) fractional crystallization
(b) sublimation
(c) chromatography
(d) benedict reagent
Option c – chromatography
An organic compound ‘A’ with molecular formula C₂H4O₂ turns blue litmus to red and gives brisk effervescence with sodium hydrogen carbonate. Identify the compound
(a) Methanoic acid
(b) Ethanoic acid
(c) Propanoic acid
(d) Butanoic acid
Option b – Ethanoic acid
Glacial acetic acid is
(a) 100% acetic acid-free of water
(b) solidified acetic acid
(c) gaseous acetic acid
(d) frozen acetic acid
Option a – 100% acetic acid-free of water
When ethanoic acid reacts with ethanol a sweet-smelling product is formed. The functional group of the product is
(a) aldehyde
(b) ketone
(c) alcohol
(d) ester
Option d – ester
Which of the following decolorizes alkaline KMnO4 solution?
(a) Ethane
(b) Ethene
(c) Methane
(d) Propane
Option b – Ethene
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
Covalency is
(a) the number of electrons donated by an atom
(b) the number of electrons contributed by an atom for sharing
(c) the number of electrons contributed by an atom to form an ionic bond
(d) the total number of electrons shared between two covalently bonded atoms.
Option b – the number of electrons contributed by an atom for sharing
Identify the correct ratio of the hydrogen atoms present in propane and propyne.
(a) 1: 2
(b) 2: 1
(c) 3: 2
(d) 2 : 3
Option b – 2: 1
What is the difference in the formulae and molecular masses of CH3 OH and C₂H5OH?
(a) CH3 and 16 units
(b) CH₂ and 14 units
(c) CH4 and 18 units
(d) CH3 and 16 units
Option b – CH₂ and 14 units
In which of the following is ethanol used?
(a) Tincture iodine
(b) Cough syrup
(c) Alcoholic drinks
(d) All of the above
Option d – All of the above
Dehydration of ethyl alcohol to ethylene is carried by heating it with :
(a) conc H₂SO4 at 200 K
(b) acidified KMnO4 solution
(c) alkaline KMnO4 solution
(d) conc H₂SO4 at 443 K
Option d – conc H₂SO4 at 443 K
We cannot 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.
Water gas is
(a) CO + CO₂
(b) CO + N₂
(c) CO + H₂
(d) CO + N₂ + H₂
Option c – CO + H₂
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