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4351

During the fractional distillation of crude oil, the fraction that distills at 200 - 250\(^0\) C is

  • A. bitumen
  • B. diesel
  • C. kerosene
  • D. petrol
View Answer & Discuss (4) JAMB 2024
4352

A liquid hydrocarbon obtained from fractional distillation of coal tar that is used in the pharmaceutical industry is

  • A. xylene
  • B. benzene
  • C. hexane
  • D. Toluene
View Answer & Discuss (1) JAMB 2024
4353

An organic compound contains 53.1% Carbon, 6.2% Hydrogen, 12.4% Nitrogen, and 28.3% Oxygen by mass. What is the molecular formula of the compound if its vapour density is 56.5?   [ C =12, H = 1, N = 14, O = 16]. 

  • A. C\(_5\)H\(_7\)NO\(_2\)
  • B. C\(_5\)H\(_6\)NO\(_2\)
  • C. C\(_3\)H\(_6\)NO\(_2\)
  • D. C\(_3\)H\(_7\)NO\(_2\)
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4354

The empirical formula of an organic liquid hydrocarbon is XY. If the relative molar masses of X and Y are 72 and 6 respectively, it's vapour density is likely to be

  • A. 33
  • B. 66
  • C. 39
  • D. 78
View Answer & Discuss (5) JAMB 2024
4355

Biuret test is a chemical test used for detecting the presence of 

  • A. carbohydrates
  • B. proteins
  • C. amines
  • D. alkanoates
View Answer & Discuss (1) JAMB 2024
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