Retrosynthesis Organic Chemistry. We covered all the Retrosynthesis Organic Chemistry in this post for free so that you can practice well for the exam.
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MCQ on Retrosynthesis Organic Chemistry for Students
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
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
Ethanoic acid was added to sodium bicarbonate solution and the gas evolved was tested with a burning splinter. The following four observations were reported: A. The gas burns with the pop sound and the flame get extinguished. B. The gas does not burn but the splinter burns with a pop sound. C. The flame extinguishes and the gas does not burn. D. The gas burns with a blue flame and the splinter burns brightly. The correct observation is reported in
(a) A and B
(b) B and C
(c) C only
(d) D only
Option c – C only
Oils on treating with hydrogen in the presence of palladium or nickel catalyst form fats. This is an example of
(a) Addition reaction
(b) Substitution reaction
(c) Displacement reaction.
(d) Oxidation reaction
Option a – Addition reaction
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 the 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
Vegetable oils which are liquid at room temperature can be converted to solid ghee by the process of
(a) dehydrogenation
(b) hydrogenation
(c) halogenation
(d) dehydration
Option b – hydrogenation
Which of the following does not belong to the same homologous series?
(a) CH4
(b) C₂H6
(c) C3H8
(d) C4H8
Option d – C4H8
Ethanol reacts with sodium and forms two products. These are
(a) sodium ethanoate and hydrogen
(b) sodium ethanoate and oxygen
(c) sodium ethoxide and hydrogen
(d) sodium ethoxide and oxygen
Option c – sodium ethoxide and hydrogen
The final product of the chlorination of methane in the sunlight is
(a) CH3Cl
(b) CH₂Cl₂
(c) CHCl3
(d) CCl4
Option d – CCl4
Benzene with molecular formula C6H6 has
(a) six single and six double bonds
(b) twelve single and six double bonds
(c) twelve single and three double bonds
(d) six single bonds and three double bonds
Option c – twelve single and three double bonds
The by-product of the soap industry is
(a) glycerol
(b) glycol
(c) isoprene
(d) acid
Option a – glycerol
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 of blood to carry oxygen, is formed when a candle burns.
Option d – carbon monoxide gas, which reduces the ability of blood to carry oxygen, is formed when a candle burns
The IUPAC name of : CH3-C(CH3) (OH) CH₂ – CH (CH3) CH3 is
(a) 2,4-dimethyl pentane-2-ol
(b) 2,4-dimethyl pentane-4-ol
(c) 2,2-dimethyl butane
(d) butanol-2-on
Option a – 2,4-dimethyl pentane-2-ol
Ram went to the chemistry lab to perform the experiment, which is given as: “He took 3 ml of ethanol in a dry test tube and warm it gently in a water bath, then added a 5% solution of alkaline potassium permanganate drop by drop to this solution.” What did Ram not observe in his experimental test tube:
(a) The purple color of the solution disappears upon heating.
(b) The smell of ethanol comes out
(c) The solution of the test tube turns blue litmus to red.
(d) The smell of vinegar comes out from the test tube.
Option d – The smell of vinegar comes out from the test tube
On the basis of the following features identify the correct option A. Drinks containing ethanol B. These drinks are a major source of income for the government
(a) Alcoholic beverages
(b) Soft drinks
(c) Carbonated beverages
(d) Rectified spirit
Option a – Alcoholic beverages
Two adjacent layers in graphite are bonded by comparatively
(a) strong forces
(b) weak forces
(c) no forces
(d) few strong and few weak forces
Option b – weak forces
The difference in molecular consecutive weight of two members of a homologous series is
(a) 15
(b) 14
(c) 8
(d) 9
Option b – 14
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