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Carbon and its Compounds-Important Questions & Preparation Tips

May 23, 2013 10:04 IST

    In this article you will get the clue that from where and how the questions are being framed from the chapter Carbon and its compounds. Our experts have full confidence that you will not lose any of the questions in the board exam as well as in home exams from this chapter if you will keep the following terms / question in your mind while studying

    • Why is carbon so important in spite of it being present in a very small quantity?
    • Justify the statement: carbon always forms covalent bond?
    • Why is valency of carbon 4?
    • The most important natural resource of hydrocarbons
    • The most unique property of carbon and the form in which carbon occurs
    • Definition of allotrope and about different allotropes of carbon
    • Compare the different physical and chemical properties of diamond and graphite?
    • What are the uses of graphite?
    • Advantage of having sheet like structure in graphite
    • What is pencil led made up of?
    • Which allotrope of carbon is football shape?
    • Why carbon compounds are having low melting and boiling points?
    • List two points to prove that carbon compounds are covalent in nature.
    • How vital force theory was disproved?
    • Why oxides, carbonates, hydrogencarbonates and carbides are not considered as organic compounds?
    • Most of the organic compounds are carbon compounds. Why?
    • Give two properties of carbon responsible for the formation of large numbers of organic compounds
    • Definition and types of hydrocarbon
    • Explain the Properties of alkanes alkenes and alkynes.
    • What is the general formula of saturated hydrocarbons or alkanes?
    • General formula of alkenes and alkynes
    • General formula of alkenes and alkyl group
    • Draw the electron dot structure of ethane, ethene and ethyne
    • What are alkyl group? Give example.
    • What will be the formula for cyclohexane and benzene?
    • Give the IUPAC name and formulae of an organic compound containing single bond and triple bond
    • How can diamonds be made artificially? How does synthetic diamond differ from natural ones?
    • What are homologous series? What is its formula? give example?
    • What are the characteristics of a homologous series?
    • Write the 3rd and 5th member of homologous series of carbon compound represented by the general formula CnH2n-2
    • What are haloalkanes? Give example?
    • Calculate the difference in the molecular formulae and molecular masses for:
    CH3OH and C2H5OH
    C2H5OH and C3H7OH
    C3H7OH and C4H9OH

    • IUPAC System of nomenclature
    • Write the common name of butanone and draw its structure?
    • What are isomers? Give example.
    • Write the structural formulae of any two isomers of hexane (C6H14) other than n-hexane.
    • How does graphite act as a lubricant.
    • Describe the structure of graphite with the help of a diagram?
    • Difference between molecular mass of adjacent homologous
    • Importance of functional group and please remember the important functional groups like aldehydes, ketones, and carboxylic acid
    • Why is LPG considered an excellent fuel?
    • Why does kerosene stove have tiny holes?
    • Disadvantages of incomplete combustion?
    • Explain substitution and addition reactions with an example?
    • How is vegetable ghee prepared? Explain the process?
    • Explain the formation of yester
    • Harmful effects of drinking
    • What is denatured alcohol?
    • Uses of ethanoic acid
    • An organic compound P is constituent of wine and beer. Thus compound, on heating with alkaline potassium permanent forms another organic compound Q which turns blue litmus to red. Identify compound P write the chemical equation of the reaction that take place to form the compound name compound Q
    • C3H7COOC2H5 is the molecular formula of an ester. Write molecular formula of the alcohol and the acid from which it might be prepared.
    • What are detergents?
    • What is soap and explain the process of manufacturing soap?
    • Why common salt is added in soap making process
    • Define micelle
    • Explain with the help of diagram the structure of soap molecule.
    • What is the cleansing action of soap? List the limitations of soap?
    • Behavior of soap with soft and hard water
    • What happens when propanoic acid is warmed with methanol in the presence of a few drops of concentrated sulphuric acid? Write the equation of the reaction involved?
    • Distinguish experimentally between an alcohol and carboxylic acid on the basis of a chemical property?
    • How you will write the molecular formula of alkane, alkene and alkyne if it is given that a hydrocarbon molecule has 3 carbon atoms
    • Identify the buckminsterfullerene from the given number of carbon atom like C90, C60, C70 and C120
    • Two common alcohols, carboxylic acids and esters name

    1. Which of the following statements is true with regard to hydrogen?
    i. Hydrogen reacts to attain a duplet of electrons in its K shell.
    ii. Hydrogen always forms a single covalent bond.
    iii. Hydrogen can form a single and a double covalent bond.
    a. (i)
    b. (i) and (ii)
    c. (i) , (ii) and (iii)
    d. (i) and (iii)

    2. Which of the following compounds of carbon does not consist of ions?
    a. CHCl3
    b. CaCO3
    c. NaHCO3
    d. Ca2C
     
    3. Which of the following statements is not true?
    i. In the earth’s crust carbon is present in the form of minerals.
    ii. In the atmosphere very less amount of carbon is present.
    iii. In the earth’s crust very large amount of carbon is present.
    a. (i)
    b. (i) and (iii)
    c. (iii)
    d.  (ii) and (iii)

    4. Two compounds ‘A’ and ‘B’ are isomers. Which of the following statements, regarding A and B, is true?
    i. Both will have same IUPAC name
    ii. Both will have same structure
    iii. Both are hydrocarbons
    iv. Both have same molecular formula
    a. (i) , (iii) and (iv)
    b. (iii) and (iv)
    c. (iv)
    d.  (iii)

    5. Which of the following compounds is an unsaturated hydrocarbon?
    i. Propane
    ii. Benzene
    iii. Acetylene
    a. (i) and (iii)
    b. (i) and (ii)
    c.  (iii)
    d. (i), (ii) and (iii)

    6. Which of the following bonds is very strong and hence very stable?
    a. Carbon-Carbon bond
    b. Carbon–Iodine bond
    c. Carbon-Silicon bond
    d. Carbon–Sulphur bond

    7. Which of the following statements is not true regarding alkenes?
    a. Alkenes are hydrocarbons.
    b. They are unsaturated compounds.
    c. They can consist of more than one double bond.
    d. The number of hydrogen atoms is always double the number of carbon atoms.

    8. Which of the following is the molecular formula of cyclobutane?

    a. C4H10
    b. C 4H 6
    c. C 4H 8
    d. C 4H 4

    9. Which of the following statements about graphite and diamond is true ?
    a. They have the same crystal structure
    b. They have the same degree of hardness
    c. They have the same electrical conductivity
    d. They can undergo the same chemical reactions

    10. While cooking, if the bottom of the vessel is getting blackened on the outside, it means that
    a.  the food is not cooked completely
    b. the fuel is not burning completely
    c. the fuel is wet
    d. the fuel is burning completely

    11. Cation is formed when
    a. atom gains electrons
    b. atom loses electrons
    c. proton is lost by the atom
    d. atom shared by electrons

    12. Homologous series is a series of compounds in which
    a. The same functional group substitutes for hydrogen in a carbon chain.
    b. Formulae of successive compounds differ by a –CH3 – unit.
    c. Representation is possible by aany formula.
    d. Is collection of compounds with different functional groups.

    13. The I.U.P.A.C name of CH3CH2CH=CH2 is?
    a. Butene
    b. Prop-1-ene
    c. But-1-ene
    d. Butyne

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