English

ہوم / مشق / الکائل ہیلائیڈ / ورک شیٹ

آن لائن مشق کریں

الکائل ہیلائیڈ

Written by Dr. Ayesha Nadeem (Chemistry)

بارہویں جماعت · کیمیا · 8 سوالات

نام: ____________________   تاریخ: ____________

  1. The functional group in an alkyl halide is:

    • A -COOH
    • B -OH
    • C -X (a halogen)
    • D -NH2

  2. Alkyl halides undergo mainly:

    • A Electrophilic addition
    • B Combustion only
    • C Nucleophilic substitution
    • D Polymerisation

  3. Aqueous NaOH converts bromoethane into:

    • A Ethanal
    • B Ethanol
    • C Ethene
    • D Ethane

  4. Ethanolic KOH converts bromoethane mainly into:

    • A Ethanol
    • B Ethane
    • C Ethanoic acid
    • D Ethene

  5. Which halide is the most reactive towards substitution (same alkyl group)?

    • A Iodide
    • B Chloride
    • C All equal
    • D Fluoride

  6. Chloroform has the formula:

    • A CHCl3
    • B CCl4
    • C CH3Cl
    • D CH2Cl2

  7. In an SN2 reaction the nucleophile attacks:

    • A The hydrogen only
    • B From the same side
    • C The solvent
    • D From the side opposite the leaving group

  8. Alkyl chlorides can be made from alcohols by reaction with:

    • A Water
    • B NaCl
    • C PCl5 or SOCl2
    • D NaOH

جوابی کلید

1. C, 2. C, 3. B, 4. D, 5. A, 6. A, 7. D, 8. C

  1. An alkyl halide has a halogen bonded to an alkyl group.

  2. A nucleophile replaces the halogen.

  3. OH- replaces Br-.

  4. Elimination of HBr gives the alkene.

  5. The C-I bond is the weakest, so iodide leaves most easily.

  6. Trichloromethane is CHCl3.

  7. This inverts the configuration.

  8. These reagents replace the OH group with Cl.