HEC USAT-E (Pre-Engineering) Chemistry: Most Repeated MCQs with Answers

Practise HEC USAT-E (Pre-Engineering) Chemistry most repeated MCQs in sets of about 20 questions with instant answers and explanations. This page focuses on …

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HEC USAT-E (Pre-Engineering) Chemistry Most Repeated sample MCQs

  1. Q1. What is the compressibility factor for an ideal gas?

    • A) 1
    • B) 0
    • C) 2
    • D) -1

    Answer: 1

  2. Q2. The energy of an electron in the 2nd orbit of He+ is

    • A) -13.6 eV
    • B) -6.8 eV
    • C) -27.2 eV
    • D) -54.4 eV

    Answer: -27.2 eV

  3. Q3. The rate constant for a reaction is 0.01 M-1s-1. The order of the reaction is

    • A) 1
    • B) 2
    • C) 0
    • D) 3

    Answer: 2

  4. Q4. What is the hybridization of NH3?

    • A) sp2
    • B) sp3
    • C) sp
    • D) dsp2

    Answer: sp3

  5. Q5. The reaction of alcohols with SOCl2 gives

    • A) Alkyl halides
    • B) Alkenes
    • C) Alkynes
    • D) Alkanes

    Answer: Alkyl halides

  6. Q6. The most stable carbocation among the following is

    • A) Tertiary butyl carbocation
    • B) Secondary butyl carbocation
    • C) Primary butyl carbocation
    • D) Methyl carbocation

    Answer: Tertiary butyl carbocation

  7. Q7. Williamson's synthesis is used to prepare

    • A) Ethers
    • B) Alcohols
    • C) Aldehydes
    • D) Ketones

    Answer: Ethers

  8. Q8. The compound that is used as an antiseptic is

    • A) Phenol
    • B) Ethanol
    • C) Diethyl ether
    • D) Glycerol

    Answer: Phenol

  9. Q9. The dehydration of alcohols gives

    • A) Alkenes
    • B) Alkanes
    • C) Alkynes
    • D) Alkyl halides

    Answer: Alkenes

  10. Q10. The reaction of alcohols with PBr3 gives

    • A) Alkyl bromides
    • B) Alkenes
    • C) Alkynes
    • D) Alkanes

    Answer: Alkyl bromides

  11. Q11. The compound that is used as a solvent is

    • A) Diethyl ether
    • B) Phenol
    • C) Ethanol
    • D) Glycerol

    Answer: Diethyl ether

  12. Q12. The boiling point of alcohols is higher than that of corresponding alkanes due to

    • A) Hydrogen bonding
    • B) Van der Waals forces
    • C) Dipole-dipole interactions
    • D) Ionic interactions

    Answer: Hydrogen bonding

  13. Q13. The compound that is most acidic among the given options is

    • A) Phenol
    • B) o-Nitrophenol
    • C) m-Nitrophenol
    • D) p-Nitrophenol

    Answer: o-Nitrophenol

  14. Q14. The order of boiling points of the following is: CH3CH2CH2OH, CH3CH2OCH3, CH3CH2CH3

    • A) CH3CH2CH2OH > CH3CH2OCH3 > CH3CH2CH3
    • B) CH3CH2CH3 > CH3CH2OCH3 > CH3CH2CH2OH
    • C) CH3CH2OCH3 > CH3CH2CH2OH > CH3CH2CH3
    • D) CH3CH2CH2OH > CH3CH2CH3 > CH3CH2OCH3

    Answer: CH3CH2CH2OH > CH3CH2OCH3 > CH3CH2CH3

  15. Q15. The reaction of phenol with CH3COCl gives

    • A) Phenyl acetate
    • B) Acetophenone
    • C) Benzaldehyde
    • D) Benzoic acid

    Answer: Phenyl acetate

  16. Q16. The boiling point of diethyl ether is lower than that of

    • A) Ethanol
    • B) Propanol
    • C) Butanol
    • D) All of the above

    Answer: All of the above

  17. Q17. The reaction of alcohols with PCl5 gives

    • A) Alkyl chlorides
    • B) Alkyl phosphates
    • C) Alkenes
    • D) Alkyl halides and POCl3

    Answer: Alkyl halides and POCl3

  18. Q18. The acidity of phenol is increased by

    • A) Electron-donating groups
    • B) Electron-withdrawing groups
    • C) Alkyl groups
    • D) Aryl groups

    Answer: Electron-withdrawing groups

  19. Q19. The reaction of ethers with cold concentrated H2SO4 gives

    • A) Alkyl hydrogen sulfates
    • B) Alkyl sulfates
    • C) Alkenes
    • D) Alcohols

    Answer: Alkyl hydrogen sulfates

  20. Q20. The reaction of phenol with Na2Cr2O7 / H2SO4 gives

    • A) Benzoquinone
    • B) Benzaldehyde
    • C) Benzoic acid
    • D) Phenol

    Answer: Benzoquinone

What are most repeated Chemistry MCQs for HEC USAT-E (Pre-Engineering)?

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