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Organic Chemistry - Some Basic Principles and Techniques Test - 5

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Organic Chemistry - Some Basic Principles and Techniques Test - 5
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Weekly Quiz Competition
  • Question 1
    1 / -0
    The correct stability order for the following species is

  • Question 2
    1 / -0
    0.395 g of an organic compound by Carius method for the estimation of S gave 0.582 g of BaSO4. The percentage of S in the compound is
  • Question 3
    1 / -0

    What is the type of hybridisation of each carbon in the compound (CH3)2CO?

    Solution

    The hybridisation of the C in CH3 (all are single bonds) is sp3 and that of C of >C=O (double bond) bond is ​​sp2

  • Question 4
    1 / -0

    Which of the following organic compound Wohler synthesised from an inorganic compound, ammonium cyanate in the presence of heat:

    Solution

    The reaction can be given as starting with solutions of potassium cyanate and ammonium chloride which are mixed, heated and cooled again to get ammonium cyanate salt which on decomposition gives the urea.

  • Question 5
    1 / -0
    The general formula CnH2nO2 could be for open chain
  • Question 6
    1 / -0
    Aniline is purified by
  • Question 7
    1 / -0

    The following compound is:

    Solution

    Tropone or 2,4,6-cycloheptatrien-1-one is a non-benzenoid aromatic compound. The compound consists of a ring of seven carbon atoms with three conjugated alkene groups and a ketone group.

  • Question 8
    1 / -0
    The compounds CH3OC3H7 and C2H5OC2H5 exhibit
  • Question 9
    1 / -0
    The boiling point of glycerol is 563 K, but it decomposes below 563 K. It is purified by
  • Question 10
    1 / -0
    Pick out the wrong statement.
  • Question 11
    1 / -0
    How many s and p bonds are there in a molecule of tetracyanoethylene?
     
  • Question 12
    1 / -0

    Propanal and propanone are

    Solution

    Two or more compounds having the same molecular formula but different functional groups are called functional isomers and this phenomenon is termed as functional group isomerism. For example, the molecular formula C3H6O represents both a ketone and aldehyde: CH3COCH3 and CH3CH2CHO

  • Question 13
    1 / -0

    Which of the following reactions represents a, g elimination reaction?

  • Question 14
    1 / -0
    Of the five isomeric hexanes, the isomer which can give two monochlorinated compounds is
  • Question 15
    1 / -0
    Which of the following has the most nucleophilic nitrogen?
  • Question 16
    1 / -0

    The molecular formula C3H8O represents two alcohols: propan-1-ol and propan-2-ol. This property is called as:

    Solution

    propan-1-ol and propan-2-ol are positional isomers as they differ only in the position of functional group -OH.

    Positional isomers are isomers that have the same carbon skeleton and the same functional groups but differ from each other in the location of the functional groups on or in the carbon chain.

  • Question 17
    1 / -0
    Which type of isomers are formed by the compounds methoxymethane and ethanol?
  • Question 18
    1 / -0

    Compounds containing carbon atoms joined together in the form of a ring as following are:

    Solution

    An alicyclic compound is an organic compound that is both aliphatic and cyclic. They contain one or more all-carbon rings which may be either saturated or unsaturated, but do not have aromatic character.

  • Question 19
    1 / -0
    Which of the following is not a cyclic compound?
  • Question 20
    1 / -0
    Which of the following compounds will exhibit geometrical isomerism?
  • Question 21
    1 / -0

    The IUPAC name of which of the following compounds is incorrect?

  • Question 22
    1 / -0
    Which of the following is optically active?
  • Question 23
    1 / -0
    The number of isomers, including stereoisomers, possible for the compound having molecular formula C4H8 is
  • Question 24
    1 / -0
    Which of the following is not true regarding electromeric effect?
  • Question 25
    1 / -0
    0.4 g of an organic compound gave 0.188 g of silver bromide by a halogen estimation method. The percentage of bromine in the compound is (atomic mass of Ag = 108, atomic mass of Br = 80)
  • Question 26
    1 / -0

    Covalent bonds are formed with other carbon atoms due to

    Solution

    Catenation is the linkage of atoms of the same element into longer chains.Catenation  occurs most readily in carbon, which forms covalent bonds with other carbon atoms to form longer chains and structures. This is the reason for the presence of the vast number of organic compounds in nature.

  • Question 27
    1 / -0

    A known mass of an organic compound is heated with fuming nitric acid in the presence of silver nitrate. This is:

    Solution

    The Carius method in analytical chemistry is a method for the quantitative determination of halogens in organic substances. It involves heating a known mass of an organic compound with fuming nitric acid in the presence of silver nitrate contained in a hard glass tube known as carius tube, in a furnace. The halogen present forms the corresponding silver halide (AgX). It is filtered, washed, dried and weighed.

  • Question 28
    1 / -0
    Which of the following compounds contains amide functional group?
  • Question 29
    1 / -0
    An organic compound containing C, H and N gives the following on analysis:

    C = 40%, H = 13.33% and N = 46.67%

    What would be its empirical formula?
  • Question 30
    1 / -0
    The common name of 2-butanone is
  • Question 31
    1 / -0
    Which of the following is s-butyl phenylvinyl methane?
  • Question 32
    1 / -0

    Hyperconjugation in an organic compound is a

    Solution

    Hyperconjugation is the stabilizing interaction that results from the interaction of the electrons in a C-H σ-bond with an adjacent empty p orbital or a π orbital to give an extended molecular orbital that increases the stability of the system. It is a permanent effect.

  • Question 33
    1 / -0
    Which of the following groups does not have priority over formyl (-CHO) group in nomenclature?
  • Question 34
    1 / -0
    The order of stability of the following carbocations is:

  • Question 35
    1 / -0

    Benzene and other related unsaturated ring compounds (benzenoid) such as given below are called:

    Solution

    Aromatic compounds follow Huckels (4n+2)π electrons rule. They can be benzenoid or non-benzenoid. They may also be heterocyclic.

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