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Monday, 06 April 2026
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Chemistry Past Questions and Answers

Jamb Chemistry Questions

Question 21:
3Cl2 + 2NH3 \(\to\) N2 + 6HCl. In the above reaction, ammonia acts as
  • A A reducing agent
  • B An oxidizing agent
  • C An acid
  • D A catalyst
  • E A dry agent
View Answer & Explanation
Question 22:
In the Haber process for the manufacture of ammonia, finely divided iron is used as
  • A An ionizing agent
  • B A reducing agent
  • C A catalyst
  • D A dehydrating agent
  • E An oxidizing agent
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Question 23:
The hybridization of the carbon atom in ethyne is
  • A Sp 4
  • B Sp 3
  • C Sp2
  • D Sp
  • E S
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Question 24:
An organic compound with a vapour density 56.5 has the following percentage composition:C =53.1% N = 12.4%, O = 28.3%, H = 6.2%. The molecular formula of the compound is
Relative atomic masses: N = 14, O = 16, C = 12, H = 1 )
  • A C3H6O2N
  • B C5H6O2N
  • C (C5H7O2N)1/2
  • D C5H7O2N
  • E (C5H7O2N)2
View Answer & Explanation
Question 25:
When the kerosene fraction from petrol is heated at high temperature, a lower boiling liquid is obtained. This process is known as
  • A Polymerization
  • B Refining
  • C Hydrogenation
  • D Cracking
View Answer & Explanation