JAMB Chemistry 2019 Objective — Question 7
Question 7 of 40 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2019 Objective paper, with the correct answer and a full explanation.
Advertisement
Which of the following is a double salt?
- A. KAl(SO₄)₂.12H₂OCorrect
- B. K₃Fe(CN)₆
- C. KHSO₄
- D. Mg(OH)NO₃
Explanation
A double salt is a mixture of two simple salts and contains two different cations and one anion (or vice versa). Alum, KAl(SO₄)₂.12H₂O, is a classic example. (K₃Fe(CN)₆ is a complex salt; KHSO₄ is an acid salt; Mg(OH)NO₃ is a basic salt.)
Advertisement
Sign up free to unlock
- Score tracking
- Practice history
- Saved questions
- Progress dashboard
- Personalized sessions
- Weak-topic breakdown
…and/or go further with premium services and No Ads.