Question 531:

• JAMB 1988

The ion that may be assumed to have negligible concentration in a sample of water that lathers readily with soap is?

A. Mg⁺
B. K⁺
C. CO₂^2-
D. HCO₃

Question 532:

• JAMB 1988

A substance S is isomorphous with another substance R. When a tiny crystals of S is added into a supersaturated solution of R?

A. S dissolves in the solution
B. Crystals of R are precipitated
C. There is no observable change
D. R and S react to generate heat

Question 533:

• JAMB 1988

Which of the following dilute solutions has the lowest pH value?

A. Calcium trioxocarbonate (IV)
B. Sodium trioxocarbonate (IV)
C. Hydrochloric acid
D. Ethanoic acid

Question 534:

• JAMB 1988

Which of the following in aqueous solution is neutral to litmus?

A. NH₄CI
B. NaCO₃
C. FeCl₃
D. NaCl

Question 535:

• JAMB 1988

What volume of a 0.1 M H₃PO₄ will be required to neutralize 45.0 cm³ of a 0.2 M NaOH?

A. 10.0 cm³
B. 20.0 cm³
C. 27.0 cm³
D. 30.0 cm³