Jamb Chemistry Past Questions For Year 2018
Question 71
Elements P, Q, R, S have 6, 11, 15, 17 electrons respectively, therefore,
- A. P will form an electrovalent bond with R
- B. Q will form a covalent bond with S
- C. R will form an electrovalent bond with S
- D. Q will form an electrovalent bond with S
Question 72
3H\(_{2(g)}\)+ N\(_{2(g)}\)⇔ 2NH\(_{3(g)}\) ; H= -ve
In the reaction above, lowering of temperature will
- A. have no effect on the equilibrium position
- B. increase the rate of both the forward and reverse reactions equally
- C. favour the forward reaction
- D. favour the reverse reaction
Question 73
Sieving is a technique used to separate mixtures containing solid particles of
- A. small sizes
- B. large sizes
- C. different sizes
- D. the same size
Question 74
If the molecular mass of tetraoxosulphate (VI) acid is 98, calculate its vapour density.
- A. 196
- B. 49
- C. 106
- D. 82
Question 75
Which of these alloys contains copper?
- A. solder
- B. steel
- C. permallory
- D. bronze
