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1009 available questions

Chemistry · Question 81

One mole of a reactant reacts with a rate of 0.6 moldm"s*. What is the rate constant of this reaction if reaction is first order?

  1. 1s-1
  2. 0.3s-1
  3. 0.6s-1
  4. 0.9s-1
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Correct answer: C

0.6s-1

Chemistry · Question 82

In cannizzaro's reaction, Benzyl alcohol is obtained from:

  1. benzaldehyde
  2. benzene
  3. picric acid
  4. benzyl chloride
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Correct answer: A

benzaldehyde

Chemistry · Question 83

The carbonyl compound which is attached with at least one H atom at one side is called as ________

  1. Ketones
  2. Aldehydes
  3. Ethers
  4. Alkyl halides
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Correct answer: B

Aldehydes

Chemistry · Question 84

In which of the following molecule hydrogen bond is not present

  1. H2O
  2. HF
  3. CH4
  4. NH3
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Correct answer: C

CH4

Chemistry · Question 85

Which of the following statements is false about the acid-strength of acetic acid

  1. Acetic acid is a stronger acid than monochloroacetic acid.
  2. Acetic acid is a stronger acid than propionic acid.
  3. Acetic acid is a weaker acid than Trichloroacetic acid.
  4. Acetic acid is a weaker acid than formic acid.
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Correct answer: A

Acetic acid is a stronger acid than monochloroacetic acid.

Chemistry · Question 86

What is the common name of the compound CH3-(CH2)2-CH2-CI

  1. Chloropentane
  2. n-Chloropentane
  3. n-pentyl chloride
  4. 1-chloropentane
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Correct answer: C

n-pentyl chloride

Chemistry · Question 87

During base catalyzed reactions, which property of nucleophile increases

  1. Basicity
  2. Nucleophilicty
  3. Electrophilicity
  4. Both b and c
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Correct answer: B

Nucleophilicty

Chemistry · Question 88

Formation of carbon dioxide hinders in calculating the heat of formation of

  1. CC14
  2. O3
  3. CO
  4. C
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Correct answer: C

CO

Chemistry · Question 89

Which of the following elements has the same oxidation number in all of its known compounds

  1. Beryllium
  2. Chlorine
  3. Nitrogen
  4. Bromine
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Correct answer: A

Beryllium

Chemistry · Question 90

Which of the following will not affect the Sal mechanism

  1. Nature of solvent
  2. Carbocation
  3. Nature of nucleophile
  4. Carbanion
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Correct answer: D

Carbanion