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Hydrocarbons Te...

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  • Question 1
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    Which is not obtained when metal carbides react with $$H_{2}O$$?

  • Question 2
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    Directions For Questions

    The term carbide is generally applied to compounds in which carbon is bonded to the elements of lower or approximately same electronegativity. This definition excludes the compounds in which oxygen, sulphur, phosphorus, nitrogen, and halogens are united with carbon. Reactive metals (i.e., of groups 1 and 2) form ionic carbides. They hydrolyze to liberate hydrocarbons. Most of them resemble with $$NaCl$$ in the crystal structure. Transition metals form interstitial carbides.

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    Consider the following carbides:
    $$\underset {I}{CaC_2} {\;} \underset {II}{Be_2C} {\;} \underset {III}{MgC_2} {\;} \underset {IV}{SrC_2}$$
    Select the carbide which gives different product on hydrolysis than other carbides.

  • Question 3
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    Which is not obtained when metal carbides react with $$H_2O$$?

  • Question 4
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    Which of these metal carbides on reaction with $$H_2O$$ form $$CH_4$$?

  • Question 5
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    Consider two alternative mechanisms for the chlorination of methane, Which step is crucial in deciding which mechanism is not likely to be observed?
    Mechanism I:

     $$A.\ \:Cl_{2} \rightarrow 2 Cl ^{*}$$
    $$B. \ \:Cl^{*}+CH_{4} \rightarrow HCl+^{*}CH_{3}$$
    $$C. \ \:\dot{C}H_{3}+Cl_{2} \rightarrow CH_{3} Cl+Cl^{*}$$
    Mechanism II: 
    $$D.\ \:Cl_{2} \rightarrow 2 Cl ^{*}$$
    $$E. \ \:Cl^{*}+CH_{4} \rightarrow CH_{3}Cl+H ^{*}$$
    $$F. \ \:H^{*}+Cl_{2} \rightarrow HCl+Cl^{*}$$

  • Question 6
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    What are the numerical values of N and M?

  • Question 7
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    Which of the following pairs of compounds of carbon will undergo combustion as well as addition reaction?

  • Question 8
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    With the help of the following equations and data choose the wrong statement.

  • Question 9
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    Which of the following statement(s) is correct?

  • Question 10
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    Arrange the reactions given below in proper sequence for the conversion of ethane to methane.
    (a) Treatment with sodium hydroxide
    (b) Treatment with aqueous $$KOH$$
    (c) Treatement with $$NaOH+CaO$$
    (d) Halogenation
    (e) Reaction with acidified $${K}_{2}{Cr}_{2}{O}_{7}$$

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