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Organic Chemistry

243 MCQ questions with answers and explanations · page 6 of 10

Test yourself▶ 25 question test▶ 50 question test

Q126. Tincture iodine is_

  1. Aaqueous solution of iodine
  2. BIodine solution with acetylene
  3. CIodine solution with benzene
  4. DAlcoholic solution of iodine
Show answer & explanation

Answer: D) Alcoholic solution of iodine

Q127. denatured alcohol_

  1. Ais a form of alcohol
  2. BNot suitable for drinking as it contains toxic substances
  3. CThese are coloured impurities.
  4. DThe taste is sweet
Show answer & explanation

Answer: B) Not suitable for drinking as it contains toxic substances

Q128. Rectified spirit is ____

  1. AMathilde Sprint
  2. B100% Ethyl Alcohol
  3. C95% ethyl alcohol
  4. Dtincture iodine
Show answer & explanation

Answer: C) 95% ethyl alcohol

Q129. Absolute alcohol is—

  1. A90% ethyl alcohol
  2. B95.57% Ethyl Alcohol
  3. C98% ethyl alcohol
  4. D100% Ethyl Alcohol
Show answer & explanation

Answer: D) 100% Ethyl Alcohol

Q130. The solution applied to the face after shaving has a cooling effect. This property is due to the presence of which compound?

  1. Aethyl alcohol
  2. Bmethyl alcohol
  3. CSalicylic acid
  4. DNone of these
Show answer & explanation

Answer: A) ethyl alcohol

Q131. What kind of reaction is fermentation?

  1. Aendothermic
  2. Bexothermic
  3. Creversible
  4. DNone of these
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Answer: B) exothermic

Q132. What is the end product of alcoholic fermentation?

  1. Apyruvic acid
  2. Bacetaldehyde
  3. Cethyl alcohol
  4. DFormic acid
Show answer & explanation

Answer: C) ethyl alcohol

Q133. Which gas is released during fermentation?

  1. Acarbon dioxide
  2. Bsulfur dioxide
  3. Coxygen
  4. Dhydrogen
Show answer & explanation

Answer: A) carbon dioxide

Q134. Gasohol is a mixture of gasoline and which of the following?

  1. Aethyl alcohol
  2. Bmethyl alcohol
  3. Cbutyl alcohol
  4. Dethylene glycol
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Answer: A) ethyl alcohol

Q135. C²H⁵OH is the chemical formula of which of the following?

  1. Aethyl alcohol
  2. Bchlorophyll
  3. Cvinegar
  4. DSugar
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Answer: A) ethyl alcohol

Q136. By what name is methanol known?

  1. Arunning alcohol
  2. Bgrain alcohol
  3. Cwood alcohol
  4. Ddenatured alcohol
Show answer & explanation

Answer: C) wood alcohol

Q137. Alcohol is formed as a result of which reaction?

  1. AFermentation
  2. Bcatalysis
  3. CCombination
  4. Ddisplacement
Show answer & explanation

Answer: A) Fermentation

Q138. When ethylene is reacted with alkaline and cold solution of potassium permanganate, it is obtained ____

  1. Aacetic acid
  2. BFormic acid
  3. Cethylene glycol
  4. DGlycerol
Show answer & explanation

Answer: C) ethylene glycol

Q139. Terylene is prepared by the reaction of tetraphthalic acid and the following:

  1. AXylene
  2. BEthylene
  3. CAcetylene
  4. Dethylene glycol
Show answer & explanation

Answer: D) ethylene glycol

Q140. In cold countries, antifreeze mixtures are used in automobile radiators. What does this mixture contain?

  1. AWater and ethyl alcohol.
  2. Bwater and glycerol
  3. Cwater and ethylene glycol
  4. Dnone of these
Show answer & explanation

Answer: C) water and ethylene glycol

Q141. 40% aqueous solution of formaldehyde is called_

  1. AEthylene
  2. BAcetylene
  3. CPyrenees
  4. DFormalin
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Answer: D) Formalin

Q142. 'Urotropin' used in urinary diseases is made from_

  1. Afrom chloroform
  2. Bfrom acetic acid
  3. Cfrom acetic acid
  4. Dfrom formaldehyde
Show answer & explanation

Answer: D) from formaldehyde

Q143. Urotropin is_

  1. Ahexamethylene diamine
  2. Bhexamethylene triamine
  3. Chexamethylene tetraamine
  4. Dhexamethylene pentaamine
Show answer & explanation

Answer: C) hexamethylene tetraamine

Q144. Aldol condensation cannot occur between

  1. Atwo different aldehydes
  2. Ban aldehyde and an ester
  3. Can aldehyde and a ketone
  4. Dtwo different ketones
Show answer & explanation

Answer: B) an aldehyde and an ester

Q145. The constituent of Pyroligneous Acid is-

  1. Aacetic acid
  2. Bmethyl alcohol
  3. CAcetone
  4. Dall of which
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Answer: D) all of which

Q146. Pyroligneous acid obtained from wood contains ____

  1. A10% ethanol
  2. B10% formaldehyde
  3. C10% acetic acid
  4. D10% formic acid
Show answer & explanation

Answer: C) 10% acetic acid

Q147. Which of the following is an aldehyde?

  1. APropine
  2. BPropanone
  3. CPropanal
  4. DPropanol
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Answer: C) Propanal

Q148. Formic acid is produced by?

  1. ATermite
  2. Bcockroach
  3. Cred ant
  4. DMosquito
Show answer & explanation

Answer: C) red ant

Q149. Which of the following acids is present in ant bites?

  1. AFormic acid
  2. BMalic acid
  3. Cperchloric acid
  4. Dnitric acid
Show answer & explanation

Answer: A) Formic acid

Q150. Which of the following acids is found in apples?

  1. AMalic acid
  2. Bsulfuric acid
  3. CFormic acid
  4. Dnitric acid
Show answer & explanation

Answer: A) Malic acid

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