Acids, bases and salts - Jamb Chemistry Past Questions and Answers

Question 36:

• JAMB 1985

Tetraoxosulphate (IV) ions are finally tested using?

A. Acidified silver nitrate
B. Acidified barium chloride
C. Ime-water
D. Dilute hydrochloric acid
E. Acidified lead nitrate

Question 37:

• JAMB 1985

An aqueous solution of an inorganic salt gave white precipitate (i) soluble in excess aqueous NaOH (ii) insoluble in excess aqueous NH₃ (iii) with dilute HCl. The cation present in the inorganic salt is?

A. Na₄⁺
B. Ca⁺⁺
C. Zn⁺⁺
D. Al⁺⁺⁺
E. Pb₊₊

Question 38:

• JAMB 1985

Some properties of chemical substances are mentioned below... i. sour taste ii. slippery touch iii. yields alkaline gas with ammonium salt iv. has pH less than 7 v. turns phenolphthalein pink.
Which of the above are NOT typical properties of alkalis?

A. I, iv and v
B. Iv and v
C. I and iv
D. Ii and v
E. Ii, iii and iv

Question 39:

• JAMB 1986

Which of the following salts when dissolved in water will NOT give the corresponding pH value?

A. NaHSO₄, pH < 5
B. Na₂CO₃, pH > 8
C. Na₂Cl,pH = 7
D. NaHCO, pH < 6

Question 40:

• JAMB 1986

Which of the following salts when dissolved in water will NOT give the corresponding pH value?

A. NaHSO₄, pH < 5
B. Na₂CO₃, pH > 8
C. Na₂Cl,pH = 7
D. NaHCO, pH < 6