Organic Chemistry Class Online. We covered all the Organic Chemistry Class Online in this post for free so that you can practice well for the exam.
Install our MCQTUBE Android app from the Google Play Store and prepare for any competitive government exams for free.
These types of competitive MCQs appear in the exams like SSC, Railways, Defence, CDS, NDA, State PSC & CSE Exams, etc. We created all the competitive exam MCQs into several small posts on our website for your convenience.
You will get their respective links in the related posts section provided below.
Related Posts:
MCQ on Organic Chemistry for Students
Which one of the following properties is NOT true for graphite?
(a) Hybridisation of each carbon atom of sp3
(b) Hybridisation of each carbon atom is sp²
(c) Electrons are delocalized over the whole sheet of atoms
(d) Each layer is composed of hexagonal rings.
Option a – Hybridisation of each carbon atom of sp3
Which one of the following statements is not correct?
(a) All carbons in diamonds are linked by a carbon-carbon single bond.
(b) Graphite is a layered structure in which layers are held together by weak van der Waals forces.
(c) Graphite layers are formed by hexagonal rings of carbon atoms.
(d) Graphite layers are held together by a carbon-carbon single bond.
Option d – Graphite layers are held together by a carbon-carbon single bond
The polarity is produced in the molecule by the interaction of two pi-bonds or between a pi-bond and lone pair of – electrons present on an adjacent atom. The above statement is true for which of the following?
(a) Inductive effect
(b) Electromeric effect
(c) Resonance effect
(d) Hyperconjugation
Option c – Resonance effect
Which one of the following is the correct sequence in increasing order of molecular weights of the hydrocarbons?
(a) Methane, ethane, propane and butane
(b) Propane, butane, ethane and methane
(c) Butane, ethane, propane and methane
(d) Butane, propane, ethane and methane
Option a – Methane, ethane, propane and butane
The characteristic odour of garlic is due to
(a) a chloro compound
(b) a sulphur compound
(c) a fluorine compound
(d) acetic acid
Option b – a sulphur compound
Which one of the following is an active component of the oil of clove?
(a) Menthol
(b) Eugenol
(c) Methanol
(d) Benzaldehyde
Option b – Eugenol
Consider the following statements about acetylene: 1. It is used in the welding industry 2. It is a raw material for preparing plastics 3. It is easily obtained by mixing silicon carbide and water of these statements
(a) 1 and 2 are correct
(b) 1 and 3 are correct
(c) 2 and 3 are correct
(d) 1, 2 and 3 are correct
Option a – 1 and 2 are correct
The flavour of apple is mainly due to which one of the following?
(a) Formalin
(b) Benzene
(c) Ethanol
(d) Benzaldehyde
Option c – Ethanol
Which of the following has the maximum density?
(a) Chloroform
(b) Water
(c) Benzene
(d) Ice
Option b – Water
The addition of ethylene dibromide to petrol
(a) increases the octane number of fuel
(b) helps eliminate lead oxide
(c) removes the sulphur compound in petrol
(d) serves as a substitute for tetraethyl lead
Option d – serves as a substitute for tetraethyl lead
The offending substance in the liquor tragedies leading to blindness etc. is
(a) ethyl alcohol
(b) amyl alcohol
(c) benzyl alcohol
(d) methyl alcohol
Option d – methyl alcohol
Molecules which of the following has a cage-like structure? 1. Diamond 2. Graphite 3. Fullerenes Select the correct answer using the code given below :
(a) 1, 2 and 3
(b) 2 and 3 only
(c) 2 only
(d) 3 only
Option d – 3 only
How is carbon black obtained?
(a) By heating wood at a high temperature in absence of air
(b) By heating coal at a high temperature in absence of air
(c) By burning hydrocarbons in a limited supply of air
(d) By heating coal at a high temperature in presence of air
Option c – By burning hydrocarbons in a limited supply of air
In paper chromatography
(a) the moving phase is liquid and the stationary phase is solid
(b) the moving phase is liquid and the stationary phase is liquid
(c) the moving phase is solid and the stationary phase is solid
(d) the moving phase is solid and the stationary phase is liquid
Option b – the moving phase is liquid and the stationary phase is liquid
For the separation of two immiscible liquids which method is used?
(a) Chromatography
(b) Fractionating column
(c) Fractional distillation
(d) Separating funnel
Option d – Separating funnel
Freon used as refrigerant is chemically known as
(a) chlorinated hydrocarbon
(b) fluorinated hydrocarbon
(c) chlorofluoro hydrocarbon
(d) fluorinated aromatic compound
Option c – chlorofluoro hydrocarbon
Which one among the following is a sin-smelling agent added to an LPG cylinder to help the detection of gas leakage?
(a) Ethanol
(b) Thioethanol
(c) Methane
(d) Chloroform
Option b – Thioethanol
The date of manufacture of food items fried in oil should be checked before buying because oils become rancid due to
(a) oxidation
(b) reduction
(c) hydrogenation
(d) decrease in viscosity
Option a – oxidation
The main constituent of Gobar gas is
(a) Ethane
(b) Methane
(c) Propane
(d) Acetylene
Option b – Methane
Which one among the following fuels is used in gas welding?
(a) LPG
(b) Ethylene
(c) Methane
(d) Acetylene
Option d – Acetylene
Methyl Isocyanate gas, which was involved in the disaster in Bhopal in December 1984, was used in the Union Carbide factory for the production of
(a) Dyes
(b) Detergents
(c) Explosives
(d) Pesticides
Option d – Pesticides
The best method for the separation of naphthalene and benzoic acid from their mixture is :
(a) distillation
(b) sublimation
(c) chromatography
(d) crystallisation
Option b – sublimation
In steam distillation, the vapour pressure of volatile organic compounds is
(a) equal to atmospheric pressure
(b) double the atmospheric pressure
(c) less than atmospheric pressure
(d) more than atmospheric pressure
Option d – more than atmospheric pressure
Fractional distillation is used when
(a) there is a large difference in the boiling point of liquids
(b) there is a small difference in the boiling points of liquids
(c) the boiling points of liquids are the same
(d) the liquids form a constant boiling mixture
Option b – there is a small difference in the boiling points of liquids
Chromatography is a valuable method for the separation, isolation, purification and identification of the constituents of a mixture and it is based on the general principle of
(a) phase rule
(b) phase distribution
(c) interphase separation
(d) phase operation
Option b – phase distribution
We covered all the organic chemistry class online above in this post for free so that you can practice well for the exam.
Check out the latest MCQ content by visiting our mcqtube website homepage.
Also, check out:
