Question 521:

• JAMB 1987

In which of the following are the aqueous solutions of each of the substances correctly arranged in order to decreasing acidity?

A. Ethanoic acid, milk or magnesia, sodium chloride, hydrochloric acid and sodium hydroxide
B. Ethanoic acid, hydrochloric acid, milk of magnesia, sodium chloride and sodium chloride and sodium hydroxide
C. Hydrochloride acid, ethanol acid, sodium chloride, milk of magnesia and sodium hydroxide
D. Hydrochloride acid, sodium hydroxide sodium chloride, ethanol acid, and milk of magnesia

Question 522:

• JAMB 1987

If 24.83 cm³ of 0.15 M NaOH is titrated to its end point with 39.45 cm³
of HCl, what is the molarity of the HCl?

A. 0.094 M
B. 0.150 M
C. 0.940 M
D. 1.500 M

Question 523:

• JAMB 1987

The atomic numbers of two elements X and Y are 12 and 19 respectively. The bond of these two elements is?

A. Ionic
B. Covalent
C. Neutral
D. Co-ordinate

Question 524:

• JAMB 1987

If d represents the density of a gas and K is a constant, the rate of gaseous diffusion r is related to d by the equation?

A. R = k/√d
B. R = kd
C. R =k/d
D. R = k √d

Question 525:

• JAMB 1987

An isotope has an atomic number of 17 and a mass number of 36. Which of the following gives the correct number of neutrons and protons in an atom of the isotope?

A. Neutrons 53, Protons 17
B. Neutrons 17, Protons 36
C. Neutrons 19, Protons 17
D. Neutrons 36, Protons 17