Chemistry · Science General

Alcohols, Ethers and Carboxylic Acids

391 Questions

Alcohols, ethers, and carboxylic acids questions explore organic chemistry reactions, chemical formulas, and compound identifications. The topics cover practical applications like antifreeze production and specific chemical conversions. This material helps candidates preparing for science oriented competitive exams.

Organic reactionsChemical compounds identificationAlcohol conversionCarboxylic acid propertiesIndustrial chemical applications

Alcohols, Ethers and Carboxylic Acids Questions

Multiple choice

The BEST agent used for fixation of Pap smear is

  1. ethyl alcohol

  2. acetone

  3. formalin

  4. xylol
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Ethyl alcohol (95% ethanol) is the standard fixative for Pap smears. It rapidly fixes cells, preserves cellular morphology, and prevents artifact formation. The smear should be immersed in alcohol immediately after collection or sprayed with fixative. Acetone is a dehydrant but not ideal for cytology. Formalin causes shrinkage artifacts. Xylol is a clearing agent used in histology processing, not for cytology fixation.

Multiple choice

Methanol is prepared industrially by

  1. catalytic reduction of carbon monoxide in the presence of ZnO-Cr2O3

  2. reaction of methane with steam at 900°C with a Ni catalyst

  3. reduction of formaldehyde with lithium aluminium hydride

  4. reaction of formaldehyde with aqueous sodium hydroxide solution
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Methanol is industrially produced by catalytic hydrogenation of carbon monoxide (CO + 2H2 → CH3OH) under high pressure and temperature. ZnO-Cr2O3 is the catalyst used. Steam reforming of methane produces syngas (CO + H2), not methanol. LiAlH4 is too expensive for industrial use. Formaldehyde is an oxidation product of methanol, not a precursor.

Multiple choice

Uretane is formed when

  1. isocyante reacts with alcohol

  2. phenol is heated with excess of formaldehydes

  3. excess phenol is heated with formaldehydes

  4. propylene is treated with Ziegler-Natta catalyst

  5. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This option is correct.

Multiple choice

Ethanol disolves in water because

  1. ethanol donates proton to water

  2. it is an acid base reaction

  3. they form hydrogen bonding

  4. ethanol gets ionised in water
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

ANS.   3.