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4651

In welding and cutting of metals, the organic gas commonly used in the heating process is

  • A. methane
  • B. propene
  • C. butane
  • D. ethyne
View Answer & Discuss (3) JAMB 2025
4652

Bronze is used in making

  • A. musical instruments and ornaments
  • B. coins and medals
  • C. electromagnets and cutlery
  • D. aircrafts and ship
View Answer & Discuss (13) JAMB 2025
4653

Find the hydrogen ion, H\(^+\) concentration and hydroxide ion, OH\(^-\) concentration in 0.06 moldm\(^{-3}\) solution of H\(_2\)SO\(_4\).

  • A. 1.2 x 10\(^{-2}\) ; 8.3 x 10\(^{-13}\)
  • B. 1.2 x 10\(^{-1}\) ; 8.3 x 10\(^{-13}\)
  • C. 1.2 x 10\(^{-1}\) ; 8.3 x 10\(^{-14}\)
  • D. 1.2 x 10\(^{-2}\) ; 8.3 x 10\(^{-14}\)
View Answer & Discuss (7) JAMB 2025
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4654

After breathing in a test tube that contains acidified K\(_2\)Cr\(_2\)O\(_7\), a man noticed a change in the colour of the acidified K\(_2\)Cr\(_2\)O\(_7\) from orange to green. This suggests the presence of 

  • A. alkanoic acid
  • B. alkanal
  • C. alkanol
  • D. alkanone
View Answer & Discuss (1) JAMB 2025
4655

The reaction above illustrated is

  • A. spontaneous
  • B. endothermic
  • C. exothermic
  • D. reversible
View Answer & Discuss JAMB 2025
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